Biscay (Congress of Deputies constituency)#1993 general election

{{About||the Basque Parliament constituency|Biscay (Basque Parliament constituency)|the Senate constituency|Biscay (Senate constituency)}}

{{Infobox constituency

| name = Biscay

| type = Congress of Deputies
Electoral

| image = SpanishCongressDistricts(Biscay).png

| image_size = 400px

| caption = Location of Biscay within Spain

| district_label = Province

| district = Biscay

| region_label = Autonomous community

| region = Basque Country

| population = File:Green Arrow Up Darker.svg1,160,133 (2024){{cite web |url=https://www.boe.es/diario_boe/txt.php?id=BOE-A-2024-25973 |title=Real Decreto 1210/2024, de 28 de noviembre, por el que se declaran oficiales las cifras de población resultantes de la revisión del Padrón municipal referidas al 1 de enero de 2024 |language=es |website=Boletín Oficial del Estado |access-date=23 December 2024}}

| electorate = File:Red Arrow Down.svg942,983 (2023)

| towns = Bilbao, Barakaldo, Getxo

| year = 1977

| seats = 10 (1977–1993)
9 (1993–2008)
8 (2008–present)

| members = {{unbulleted list

| {{Color box|{{party color|Basque Nationalist Party}}|border=darkgray}} PNV (2)

| {{Color box|{{party color|Spanish Socialist Workers' Party}}|border=darkgray}} PSOE (2)

| {{Color box|{{party color|EH Bildu (2023)}}|border=darkgray}} EH Bildu (2)

| {{Color box|{{party color|People's Party (Spain)}}|border=darkgray}} PP (1)

| {{Color box|{{party color|Sumar (electoral platform)}}|border=darkgray}} Sumar (1)

}}

Biscay ({{langx|eu|Bizkaia}}, {{langx|es|Vizcaya}}) is one of the 52 constituencies ({{langx|es|link=no|circunscripciones}}) represented in the Congress of Deputies, the lower chamber of the Spanish parliament, the Cortes Generales. The constituency currently elects eight deputies. Its boundaries correspond to those of the Spanish province of Biscay. The electoral system uses the D'Hondt method and closed-list proportional representation, with a minimum threshold of three percent.

Electoral system

The constituency was created as per the Political Reform Act 1977 and was first contested in the 1977 general election. The Act provided for the provinces of Spain to be established as multi-member districts in the Congress of Deputies,{{harvp|Law 1/1977|1977|loc=trans. prov. 1}}. with this regulation being maintained under the Spanish Constitution of 1978.{{harvp|Const. Esp.|1978|loc=tit. III, ch. I, art. 68}}. Additionally, the Constitution requires for any modification of the provincial limits to be approved under an organic law, needing an absolute majority in the Cortes Generales.{{harvp|Const. Esp.|1978|loc=tit. VIII, ch. II, art. 141}}.

Voting is on the basis of universal suffrage, which comprises all nationals over 18 years of age and in full enjoyment of their political rights.{{harvp|LOREG|1985|loc=tit. I, ch. I, art. 2}}. The only exception was in 1977, when this was limited to nationals over 21 years of age and in full enjoyment of their political and civil rights.{{harvp|RDL 20/1977|1977|loc=tit. I, art. 2}}.{{sfn|Carreras de Odriozola|Tafunell Sambola|2005|p=1077}} Amendments to the electoral law in 2011 required for Spaniards abroad to apply for voting before being permitted to vote, a system known as "begged" or expat vote ({{langx|es|Voto rogado}}),{{harvp|LOREG|1985|loc=tit. I, ch. VI, art. 75}}.{{cite web |last=Reig Pellicer |first=Naiara |date=16 December 2015 |url=http://www.cafebabel.co.uk/politics/article/spanish-elections-begging-for-the-right-to-vote.html |title=Spanish elections: Begging for the right to vote |website=cafebabel.co.uk |access-date=17 July 2017}} which was abolished in 2022.{{cite news |last=Araque Conde |first=Pilar |date=8 June 2022 |title=El Congreso acaba con el voto rogado: diez años de trabas burocráticas para los residentes en el extranjero |url=https://www.publico.es/politica/congreso-acaba-voto-rogado-diez-anos-trabas-burocraticas-residentes-extranjero.html |language=es |newspaper=Público |location=Madrid |access-date=31 July 2022}} 348 seats are elected using the D'Hondt method and a closed list proportional representation, with an electoral threshold of three percent of valid votes—which includes blank ballots—being applied in each constituency. Each provincial constituency is entitled to an initial minimum of two seats, with the remaining 248 being distributed in proportion to their populations. Ceuta and Melilla are allocated the two remaining seats, which are elected using plurality voting.{{harvp|RDL 20/1977|1977|loc=tit. II, ch. II, art. 19–20}}.{{harvp|LOREG|1985|loc=tit. II, ch. III, art. 162–164}}. The use of the electoral method may result in an effective threshold based on the district magnitude and the distribution of votes among candidacies.{{cite web |last=Gallagher |first=Michael |date=30 July 2012 |url=http://www.tcd.ie/Political_Science/staff/michael_gallagher/ElSystems/Docts/effthresh.php |archive-url=https://web.archive.org/web/20170730092518/http://www.tcd.ie/Political_Science/staff/michael_gallagher/ElSystems/Docts/effthresh.php |url-status=dead |archive-date=30 July 2017 |title=Effective threshold in electoral systems |publisher=Trinity College, Dublin |access-date=22 July 2017}}

The electoral law allows for parties and federations registered in the interior ministry, coalitions and groupings of electors to present lists of candidates. Parties and federations intending to form a coalition ahead of an election are required to inform the relevant Electoral Commission within ten days of the election call—fifteen before 1985—whereas groupings of electors need to secure the signature of at least one percent of the electorate in the constituencies for which they seek election—one permille of the electorate, with a compulsory minimum of 500 signatures, until 1985—disallowing electors from signing for more than one list of candidates. Also since 2011, parties, federations or coalitions that have not obtained a mandate in either chamber of the Cortes at the preceding election are required to secure the signature of at least 0.1 percent of electors in the aforementioned constituencies.{{harvp|RDL 20/1977|1977|loc=tit. IV, art. 30–31 & 34}}.{{harvp|LOREG|1985|loc=tit. I, ch. VI, art. 44 & tit. II, ch. V, art. 169}}.

Deputies

class="wikitable" style="font-size:95%;"

bgcolor="#CCCCCC"

! colspan="3"| Deputies 1977–present

colspan="3"| {{hidden begin|title=Key to parties|contentstyle=font-size:95%; border:solid 1px silver; padding:8px; background:white;}}

{{legend|{{party color|Herri Batasuna}}|HB|border=1px solid #AAAAAA}}

{{legend|{{party color|Amaiur}}|Amaiur|border=1px solid #AAAAAA}}

{{legend|{{party color|EH Bildu (2023)}}|EH Bildu{{efn|From 2023.}}|border=1px solid #AAAAAA}}

{{legend|{{party color|EH Bildu}}|EH Bildu{{efn|Until 2023.}}|border=1px solid #AAAAAA}}

{{legend|{{party color|United Left (Spain)}}|IU|border=1px solid #AAAAAA}}

{{legend|{{party color|Unidas Podemos}}|U.Podemos|border=1px solid #AAAAAA}}

{{legend|{{party color|Podemos (Spanish political party)}}|Podemos|border=1px solid #AAAAAA}}

{{legend|{{party color|Sumar (electoral platform)}}|Sumar|border=1px solid #AAAAAA}}

{{legend|{{party color|Euskadiko Ezkerra}}|EE|border=1px solid #AAAAAA}}

{{legend|{{party color|Spanish Socialist Workers' Party}}|PSOE|border=1px solid #AAAAAA}}

{{legend|{{party color|Basque Solidarity}}|EA|border=1px solid #AAAAAA}}

{{legend|{{party color|Basque Nationalist Party}}|PNV|border=1px solid #AAAAAA}}

{{legend|{{party color|Union of the Democratic Centre (Spain)}}|UCD|border=1px solid #AAAAAA}}

{{legend|{{party color|People's Party (Spain)}}|PP|border=1px solid #AAAAAA}}

{{legend|{{party color|People's Coalition (Spain)}}|CP|border=1px solid #AAAAAA}}

{{legend|{{party color|People's Alliance (Spain)}}|AP|border=1px solid #AAAAAA}}

bgcolor="#CCCCCC"

! Legislature

! Election

! Distribution

Constituent

| 1977

{| style="width:12.5em; font-size:90%; text-align:center; font-family:Courier New;"

style="font-weight:bold"

| style="background:{{party color|Spanish Socialist Workers' Party}}; width:30.00%; color:white;"| 3

| style="background:{{party color|Basque Nationalist Party}}; width:40.00%; color:white;"| 4

| style="background:{{party color|Union of the Democratic Centre (Spain)}}; width:20.00%; color:white;"| 2

| style="background:{{party color|People's Alliance (Spain)}}; width:10.00%; color:white;"| 1

| 1st

| 1979

style="width:12.5em; font-size:90%; text-align:center; font-family:Courier New;"

style="font-weight:bold"

| style="background:{{party color|Herri Batasuna}}; width:20.00%; color:white;"| 2

| style="background:{{party color|Spanish Socialist Workers' Party}}; width:20.00%; color:white;"| 2

| style="background:{{party color|Basque Nationalist Party}}; width:40.00%; color:white;"| 4

| style="background:{{party color|Union of the Democratic Centre (Spain)}}; width:20.00%; color:white;"| 2

| 2nd

| 1982

style="width:12.5em; font-size:90%; text-align:center; font-family:Courier New;"

style="font-weight:bold"

| style="background:{{party color|Herri Batasuna}}; width:10.00%; color:white;"| 1

| style="background:{{party color|Spanish Socialist Workers' Party}}; width:40.00%; color:white;"| 4

| style="background:{{party color|Basque Nationalist Party}}; width:40.00%; color:white;"| 4

| style="background:{{party color|People's Alliance (Spain)}}; width:10.00%; color:white;"| 1

| 3rd

| 1986

style="width:12.5em; font-size:90%; text-align:center; font-family:Courier New;"

style="font-weight:bold"

| style="background:{{party color|Herri Batasuna}}; width:20.00%; color:white;"| 2

| style="background:{{party color|Euskadiko Ezkerra}}; width:10.00%; color:white;"| 1

| style="background:{{party color|Spanish Socialist Workers' Party}}; width:30.00%; color:white;"| 3

| style="background:{{party color|Basque Nationalist Party}}; width:30.00%; color:white;"| 3

| style="background:{{party color|People's Coalition (Spain)}}; width:10.00%; color:white;"| 1

| 4th

| 1989

style="width:12.5em; font-size:90%; text-align:center; font-family:Courier New;"

style="font-weight:bold"

| style="background:{{party color|Herri Batasuna}}; width:20.00%; color:white;"| 2

| style="background:{{party color|Euskadiko Ezkerra}}; width:10.00%; color:white;"| 1

| style="background:{{party color|Spanish Socialist Workers' Party}}; width:20.00%; color:white;"| 2

| style="background:{{party color|Eusko Alkartasuna}}; width:10.00%; color:white;"| 1

| style="background:{{party color|Basque Nationalist Party}}; width:30.00%; color:white;"| 3

| style="background:{{party color|People's Party (Spain)}}; width:10.00%; color:white;"| 1

| 5th

| 1993

style="width:11.25em; font-size:90%; text-align:center; font-family:Courier New;"

style="font-weight:bold"

| style="background:{{party color|Herri Batasuna}}; width:11.11%; color:white;"| 1

| style="background:{{party color|Spanish Socialist Workers' Party}}; width:33.33%; color:white;"| 3

| style="background:{{party color|Basque Nationalist Party}}; width:33.33%; color:white;"| 3

| style="background:{{party color|People's Party (Spain)}}; width:22.22%; color:white;"| 2

| 6th

| 1996

style="width:11.25em; font-size:90%; text-align:center; font-family:Courier New;"

style="font-weight:bold"

| style="background:{{party color|Herri Batasuna}}; width:11.11%; color:white;"| 1

| style="background:{{party color|United Left (Spain)}}; width:11.11%; color:white;"| 1

| style="background:{{party color|Spanish Socialist Workers' Party}}; width:22.22%; color:white;"| 2

| style="background:{{party color|Basque Nationalist Party}}; width:33.33%; color:white;"| 3

| style="background:{{party color|People's Party (Spain)}}; width:22.22%; color:white;"| 2

| 7th

| 2000

style="width:11.25em; font-size:90%; text-align:center; font-family:Courier New;"

style="font-weight:bold"

| style="background:{{party color|Spanish Socialist Workers' Party}}; width:22.22%; color:white;"| 2

| style="background:{{party color|Basque Nationalist Party}}; width:44.44%; color:white;"| 4

| style="background:{{party color|People's Party (Spain)}}; width:33.33%; color:white;"| 3

| 8th

| 2004

style="width:11.25em; font-size:90%; text-align:center; font-family:Courier New;"

style="font-weight:bold"

| style="background:{{party color|Spanish Socialist Workers' Party}}; width:33.33%; color:white;"| 3

| style="background:{{party color|Basque Nationalist Party}}; width:44.44%; color:white;"| 4

| style="background:{{party color|People's Party (Spain)}}; width:22.22%; color:white;"| 2

| 9th

| 2008

style="width:10em; font-size:90%; text-align:center; font-family:Courier New;"

style="font-weight:bold"

| style="background:{{party color|Spanish Socialist Workers' Party}}; width:50.00%; color:white;"| 4

| style="background:{{party color|Basque Nationalist Party}}; width:37.50%; color:white;"| 3

| style="background:{{party color|People's Party (Spain)}}; width:12.50%; color:white;"| 1

| 10th

| 2011

style="width:10em; font-size:90%; text-align:center; font-family:Courier New;"

style="font-weight:bold"

| style="background:{{party color|Amaiur}}; width:25.00%; color:white;"| 2

| style="background:{{party color|Spanish Socialist Workers' Party}}; width:25.00%; color:white;"| 2

| style="background:{{party color|Basque Nationalist Party}}; width:37.50%; color:white;"| 3

| style="background:{{party color|People's Party (Spain)}}; width:12.50%; color:white;"| 1

| 11th

| 2015

style="width:10em; font-size:90%; text-align:center; font-family:Courier New;"

style="font-weight:bold"

| style="background:{{party color|EH Bildu}}; width:12.50%; color:white;"| 1

| style="background:{{party color|Podemos (Spanish political party)}}; width:25.00%; color:white;"| 2

| style="background:{{party color|Spanish Socialist Workers' Party}}; width:12.50%; color:white;"| 1

| style="background:{{party color|Basque Nationalist Party}}; width:37.50%; color:white;"| 3

| style="background:{{party color|People's Party (Spain)}}; width:12.50%; color:white;"| 1

| 12th

| 2016

style="width:10em; font-size:90%; text-align:center; font-family:Courier New;"

style="font-weight:bold"

| style="background:{{party color|EH Bildu}}; width:12.50%; color:white;"| 1

| style="background:{{party color|Unidos Podemos}}; width:37.50%; color:white;"| 3

| style="background:{{party color|Spanish Socialist Workers' Party}}; width:12.50%; color:white;"| 1

| style="background:{{party color|Basque Nationalist Party}}; width:25.00%; color:white;"| 2

| style="background:{{party color|People's Party (Spain)}}; width:12.50%; color:white;"| 1

| 13th

| 2019 (Apr)

style="width:10em; font-size:90%; text-align:center; font-family:Courier New;"

style="font-weight:bold"

| style="background:{{party color|EH Bildu}}; width:12.50%; color:white;"| 1

| style="background:{{party color|Unidas Podemos}}; width:25.00%; color:white;"| 2

| style="background:{{party color|Spanish Socialist Workers' Party}}; width:25.00%; color:white;"| 2

| style="background:{{party color|Basque Nationalist Party}}; width:37.50%; color:white;"| 3

| 14th

| 2019 (Nov)

style="width:10em; font-size:90%; text-align:center; font-family:Courier New;"

style="font-weight:bold"

| style="background:{{party color|EH Bildu}}; width:12.50%; color:white;"| 1

| style="background:{{party color|Unidas Podemos}}; width:12.50%; color:white;"| 1

| style="background:{{party color|Spanish Socialist Workers' Party}}; width:25.00%; color:white;"| 2

| style="background:{{party color|Basque Nationalist Party}}; width:37.50%; color:white;"| 3

| style="background:{{party color|People's Party (Spain)}}; width:12.50%; color:white;"| 1

| 15th

| 2023

style="width:10em; font-size:90%; text-align:center; font-family:Courier New;"

style="font-weight:bold"

| style="background:{{party color|EH Bildu (2023)}}; width:25.00%; color:white;"| 2

| style="background:{{party color|Sumar (electoral platform)}}; width:12.50%; color:white;"| 1

| style="background:{{party color|Spanish Socialist Workers' Party}}; width:25.00%; color:white;"| 2

| style="background:{{party color|Basque Nationalist Party}}; width:25.00%; color:white;"| 2

| style="background:{{party color|People's Party (Spain)}}; width:12.50%; color:white;"| 1

Elections

=2023 general election=

style="text-align:left;" rowspan="2" colspan="2" width="525"\| Parties and alliances ! colspan="3"\| Popular vote ! colspan="2"\| Seats
class="wikitable" style="text-align:right;" \|+ Summary of the 23 July 2023 Congress of Deputies election results in Biscay
width="75"\| Votes ! width="45"\| % ! width="45"\| ±pp ! width="35"\| Total ! width="35"\| +/−
width="1" style="color:inherit;background:{{party color\|Basque Nationalist Party}}"\| \| align="left"\| Basque Nationalist Party (EAJ/PNV) \| 164,188	26.93	style="color:red;"\| –8.29 \| 2	style="color:red;"\| –1
style="color:inherit;background:{{party color\|Socialist Party of the Basque Country–Basque Country Left}}"\| \| align="left"\| Socialist Party of the Basque Country–Basque Country Left (PSE–EE (PSOE)) \| 157,448	25.82	style="color:green;"\| +6.69 \| 2	±0
style="color:inherit;background:{{party color\|EH Bildu (2023)}}"\| \| align="left"\| Basque Country Gather (EH Bildu) \| 125,867	20.64	style="color:green;"\| +5.62 \| 2	style="color:green;"\| +1
style="color:inherit;background:{{party color\|People's Party (Spain)}}"\| \| align="left"\| People's Party (PP) \| 70,533	11.57	style="color:green;"\| +2.75 \| 1	±0
style="color:inherit;background:{{party color\|Sumar (electoral platform)}}"\| \| align="left"\| Unite (Sumar)¹ \| 66,592	10.92	style="color:red;"\| –5.85 \| 1	±0
colspan="7" bgcolor="#C0C0C0"\|
style="color:inherit;background:{{party color\|Vox (political party)}}"\| \| align="left"\| Vox (Vox) \| 16,069	2.64	style="color:green;"\| +0.22 \| 0	±0
style="color:inherit;background:{{party color\|Animalist Party with the Environment}}"\| \| align="left"\| Animalist Party with the Environment (PACMA)² \| 2,729	0.45	style="color:red;"\| –0.15 \| 0	±0
style="color:inherit;background:{{party color\|Workers' Front (Spain)}}"\| \| align="left"\| Workers' Front (FO) \| 929	0.15	New \| 0	±0
style="color:inherit;background:{{party color\|For a Fairer World}}"\| \| align="left"\| For a Fairer World (PUM+J) \| 804	0.13	style="color:green;"\| +0.05 \| 0	±0
style="color:inherit;background:{{party color\|Communist Party of the Workers of Spain}}"\| \| align="left"\| Communist Party of the Workers of the Basque Country (PCTE/ELAK) \| 618	0.10	style="color:green;"\| +0.02 \| 0	±0
style="color:inherit;background:{{party color\|Zero Cuts}}"\| \| align="left"\| Zero Cuts (Recortes Cero) \| 525	0.09	style="color:red;"\| –0.03 \| 0	±0
align="left" colspan="2"\| Blank ballots \| 3,391	0.56	style="color:red;"\| –0.04 \| bgcolor="#E9E9E9" colspan="2"\|
colspan="7" bgcolor="#E9E9E9"\|
style="font-weight:bold;" \| align="left" colspan="2"\| Total \| 609,693	bgcolor="#E9E9E9" colspan="2"\| \| 8	±0
colspan="7" bgcolor="#E9E9E9"\|
align="left" colspan="2"\| Valid votes \| 609,693	99.15	style="color:red;"\| –0.27 \| bgcolor="#E9E9E9" colspan="2" rowspan="5"\|
align="left" colspan="2"\| Invalid votes \| 5,251	0.85	style="color:green;"\| +0.27
style="font-weight:bold;" \| align="left" colspan="2"\| Votes cast / turnout \| 614,944	65.21	style="color:red;"\| –1.55
align="left" colspan="2"\| Abstentions \| 328,039	34.79	style="color:green;"\| +1.55
style="font-weight:bold;" \| align="left" colspan="2"\| Registered voters \| 942,983	bgcolor="#E9E9E9" colspan="2"\|
colspan="7" bgcolor="#E9E9E9"\|
align="left" colspan="7"\| Sources{{cite web \|url=https://infoelectoral.interior.gob.es/es/elecciones-celebradas/resultados-electorales/ \|title=Elecciones celebradas. Resultados electorales \|language=es \|website=Ministry of the Interior \|access-date=24 December 2024}}
colspan="7" style="text-align:left; max-width:790px;"\| {{hidden\|ta1=left\|title=Footnotes:\|content={{ubl \| ¹ Unite results are compared to the combined totals of United We Can and More Country–Ecologist Candidacy in the November 2019 election. \| ² Animalist Party with the Environment results are compared to Animalist Party Against Mistreatment of Animals totals in the November 2019 election.}}}}

=November 2019 general election=

style="text-align:left;" rowspan="2" colspan="2" width="525"\| Parties and alliances ! colspan="3"\| Popular vote ! colspan="2"\| Seats
class="wikitable" style="text-align:right;" \|+ Summary of the 10 November 2019 Congress of Deputies election results in Biscay
width="75"\| Votes ! width="45"\| % ! width="45"\| ±pp ! width="35"\| Total ! width="35"\| +/−
width="1" style="color:inherit;background:{{party color\|Basque Nationalist Party}}"\| \| align="left"\| Basque Nationalist Party (EAJ/PNV) \| 221,979	35.22	style="color:green;"\| +0.88 \| 3	±0
style="color:inherit;background:{{party color\|Socialist Party of the Basque Country–Basque Country Left}}"\| \| align="left"\| Socialist Party of the Basque Country–Basque Country Left (PSE–EE (PSOE)) \| 120,566	19.13	style="color:red;"\| –0.75 \| 2	±0
style="color:inherit;background:{{party color\|Unidas Podemos}}"\| \| align="left"\| United We Can (Podemos–IU) \| 97,125	15.41	style="color:red;"\| –2.31 \| 1	style="color:red;"\| –1
style="color:inherit;background:{{party color\|EH Bildu}}"\| \| align="left"\| Basque Country Gather (EH Bildu) \| 94,669	15.02	style="color:green;"\| +1.66 \| 1	±0
style="color:inherit;background:{{party color\|People's Party (Spain)}}"\| \| align="left"\| People's Party (PP) \| 55,621	8.82	style="color:green;"\| +1.56 \| 1	style="color:green;"\| +1
colspan="7" bgcolor="#C0C0C0"\|
style="color:inherit;background:{{party color\|Vox (political party)}}"\| \| align="left"\| Vox (Vox) \| 15,284	2.42	style="color:green;"\| +0.11 \| 0	±0
style="color:inherit;background:{{party color\|Más País}}"\| \| align="left"\| More Country–Ecologist Candidacy (Más País–Candidatura Ecologista) \| 8,542	1.36	New \| 0	±0
style="color:inherit;background:{{party color\|Citizens (Spanish political party)}}"\| \| align="left"\| Citizens–Party of the Citizenry (Cs) \| 6,929	1.10	style="color:red;"\| –2.01 \| 0	±0
style="color:inherit;background:{{party color\|Animalist Party Against Mistreatment of Animals}}"\| \| align="left"\| Animalist Party Against Mistreatment of Animals (PACMA) \| 3,783	0.60	style="color:red;"\| –0.30 \| 0	±0
style="color:inherit;background:{{party color\|Zero Cuts}}"\| \| align="left"\| Zero Cuts–Green Group (Recortes Cero–GV) \| 753	0.12	style="color:red;"\| –0.05 \| 0	±0
style="color:inherit;background:{{party color\|For a Fairer World}}"\| \| align="left"\| For a Fairer World (PUM+J) \| 494	0.08	style="color:red;"\| –0.04 \| 0	±0
style="color:inherit;background:{{party color\|Communist Party of the Workers of Spain}}"\| \| align="left"\| Communist Party of the Workers of the Basque Country (PCTE/ELAK) \| 491	0.08	style="color:red;"\| –0.01 \| 0	±0
style="color:inherit;background:{{party color\|Internationalist Solidarity and Self-Management}}"\| \| align="left"\| European Solidarity Action Party (Solidaria) \| 270	0.04	style="color:red;"\| –0.04 \| 0	±0
align="left" colspan="2"\| Blank ballots \| 3,806	0.60	style="color:red;"\| –0.06 \| bgcolor="#E9E9E9" colspan="2"\|
colspan="7" bgcolor="#E9E9E9"\|
style="font-weight:bold;" \| align="left" colspan="2"\| Total \| 630,312	bgcolor="#E9E9E9" colspan="2"\| \| 8	±0
colspan="7" bgcolor="#E9E9E9"\|
align="left" colspan="2"\| Valid votes \| 630,312	99.42	style="color:green;"\| +0.11 \| bgcolor="#E9E9E9" colspan="2" rowspan="5"\|
align="left" colspan="2"\| Invalid votes \| 3,665	0.58	style="color:red;"\| –0.11
style="font-weight:bold;" \| align="left" colspan="2"\| Votes cast / turnout \| 633,977	66.76	style="color:red;"\| –6.09
align="left" colspan="2"\| Abstentions \| 315,621	33.24	style="color:green;"\| +6.09
style="font-weight:bold;" \| align="left" colspan="2"\| Registered voters \| 949,598	bgcolor="#E9E9E9" colspan="2"\|
colspan="7" bgcolor="#E9E9E9"\|
align="left" colspan="7"\| Sources

=April 2019 general election=

style="text-align:left;" rowspan="2" colspan="2" width="525"\| Parties and alliances ! colspan="3"\| Popular vote ! colspan="2"\| Seats
class="wikitable" style="text-align:right;" \|+ Summary of the 28 April 2019 Congress of Deputies election results in Biscay
width="75"\| Votes ! width="45"\| % ! width="45"\| ±pp ! width="35"\| Total ! width="35"\| +/−
width="1" style="color:inherit;background:{{party color\|Basque Nationalist Party}}"\| \| align="left"\| Basque Nationalist Party (EAJ/PNV) \| 235,916	34.34	style="color:green;"\| +6.12 \| 3	style="color:green;"\| +1
style="color:inherit;background:{{party color\|Socialist Party of the Basque Country–Basque Country Left}}"\| \| align="left"\| Socialist Party of the Basque Country–Basque Country Left (PSE–EE (PSOE)) \| 136,547	19.88	style="color:green;"\| +5.97 \| 2	style="color:green;"\| +1
style="color:inherit;background:{{party color\|Unidas Podemos}}"\| \| align="left"\| United We Can (Podemos–IU–Equo Berdeak) \| 121,740	17.72	style="color:red;"\| –11.15 \| 2	style="color:red;"\| –1
style="color:inherit;background:{{party color\|EH Bildu}}"\| \| align="left"\| Basque Country Gather (EH Bildu) \| 91,771	13.36	style="color:green;"\| +2.47 \| 1	±0
style="color:inherit;background:{{party color\|People's Party (Spain)}}"\| \| align="left"\| People's Party (PP) \| 49,859	7.26	style="color:red;"\| –5.45 \| 0	style="color:red;"\| –1
style="color:inherit;background:{{party color\|Citizens (Spanish political party)}}"\| \| align="left"\| Citizens–Party of the Citizenry (Cs) \| 21,392	3.11	style="color:red;"\| –0.22 \| 0	±0
colspan="7" bgcolor="#C0C0C0"\|
style="color:inherit;background:{{party color\|Vox (political party)}}"\| \| align="left"\| Vox (Vox) \| 15,839	2.31	style="color:green;"\| +2.21 \| 0	±0
style="color:inherit;background:{{party color\|Animalist Party Against Mistreatment of Animals}}"\| \| align="left"\| Animalist Party Against Mistreatment of Animals (PACMA) \| 6,187	0.90	style="color:green;"\| +0.12 \| 0	±0
style="color:inherit;background:{{party color\|Zero Cuts}}"\| \| align="left"\| Zero Cuts–Green Group (Recortes Cero–GV) \| 1,177	0.17	style="color:red;"\| –0.02 \| 0	±0
style="color:inherit;background:{{party color\|For a Fairer World}}"\| \| align="left"\| For a Fairer World (PUM+J) \| 844	0.12	New \| 0	±0
style="color:inherit;background:{{party color\|Communist Party of the Workers of Spain}}"\| \| align="left"\| Communist Party of the Workers of the Basque Country (PCTE/ELAK) \| 603	0.09	New \| 0	±0
style="color:inherit;background:{{party color\|Internationalist Solidarity and Self-Management}}"\| \| align="left"\| European Solidarity Action Party (Solidaria) \| 528	0.08	New \| 0	±0
align="left" colspan="2"\| Blank ballots \| 4,557	0.66	style="color:green;"\| +0.03 \| bgcolor="#E9E9E9" colspan="2"\|
colspan="7" bgcolor="#E9E9E9"\|
style="font-weight:bold;" \| align="left" colspan="2"\| Total \| 686,960	bgcolor="#E9E9E9" colspan="2"\| \| 8	±0
colspan="7" bgcolor="#E9E9E9"\|
align="left" colspan="2"\| Valid votes \| 686,960	99.31	style="color:red;"\| –0.01 \| bgcolor="#E9E9E9" colspan="2" rowspan="5"\|
align="left" colspan="2"\| Invalid votes \| 4,742	0.69	style="color:green;"\| +0.01
style="font-weight:bold;" \| align="left" colspan="2"\| Votes cast / turnout \| 691,702	72.85	style="color:green;"\| +6.88
align="left" colspan="2"\| Abstentions \| 257,740	27.15	style="color:red;"\| –6.88
style="font-weight:bold;" \| align="left" colspan="2"\| Registered voters \| 949,442	bgcolor="#E9E9E9" colspan="2"\|
colspan="7" bgcolor="#E9E9E9"\|
align="left" colspan="7"\| Sources

=2016 general election=

style="text-align:left;" rowspan="2" colspan="2" width="525"\| Parties and alliances ! colspan="3"\| Popular vote ! colspan="2"\| Seats
class="wikitable" style="text-align:right;" \|+ Summary of the 26 June 2016 Congress of Deputies election results in Biscay
width="75"\| Votes ! width="45"\| % ! width="45"\| ±pp ! width="35"\| Total ! width="35"\| +/−
width="1" style="color:inherit;background:{{party color\|Unidos Podemos}}"\| \| align="left"\| United We Can (Podemos/Ahal Dugu–IU–Equo)¹ \| 179,347	28.87	style="color:red;"\| –0.05 \| 3	style="color:green;"\| +1
style="color:inherit;background:{{party color\|Basque Nationalist Party}}"\| \| align="left"\| Basque Nationalist Party (EAJ/PNV) \| 175,296	28.22	style="color:green;"\| +0.31 \| 2	style="color:red;"\| –1
style="color:inherit;background:{{party color\|Socialist Party of the Basque Country–Basque Country Left}}"\| \| align="left"\| Socialist Party of the Basque Country–Basque Country Left (PSE–EE (PSOE)) \| 86,425	13.91	style="color:green;"\| +0.93 \| 1	±0
style="color:inherit;background:{{party color\|People's Party (Spain)}}"\| \| align="left"\| People's Party (PP) \| 78,965	12.71	style="color:green;"\| +1.31 \| 1	±0
style="color:inherit;background:{{party color\|EH Bildu}}"\| \| align="left"\| Basque Country Gather (EH Bildu) \| 67,653	10.89	style="color:red;"\| –1.60 \| 1	±0
style="color:inherit;background:{{party color\|Citizens (Spanish political party)}}"\| \| align="left"\| Citizens–Party of the Citizenry (C's) \| 20,685	3.33	style="color:red;"\| –0.51 \| 0	±0
colspan="7" bgcolor="#C0C0C0"\|
style="color:inherit;background:{{party color\|Animalist Party Against Mistreatment of Animals}}"\| \| align="left"\| Animalist Party Against Mistreatment of Animals (PACMA) \| 4,865	0.78	style="color:green;"\| +0.12 \| 0	±0
style="color:inherit;background:{{party color\|Zero Cuts}}"\| \| align="left"\| Zero Cuts–Green Group (Recortes Cero–GV) \| 1,176	0.19	style="color:green;"\| +0.02 \| 0	±0
style="color:inherit;background:{{party color\|Blank Seats}}"\| \| align="left"\| Blank Seats (EB/AZ) \| 1,026	0.17	style="color:green;"\| +0.01 \| 0	±0
style="color:inherit;background:{{party color\|Union, Progress and Democracy}}"\| \| align="left"\| Union, Progress and Democracy (UPyD) \| 766	0.12	style="color:red;"\| –0.19 \| 0	±0
style="color:inherit;background:{{party color\|Vox (political party)}}"\| \| align="left"\| Vox (Vox) \| 641	0.10	New \| 0	±0
style="color:inherit;background:{{party color\|Communist Party of the Peoples of Spain}}"\| \| align="left"\| Communist Party of the Peoples of Spain (PCPE) \| 467	0.08	style="color:green;"\| +0.02 \| 0	±0
align="left" colspan="2"\| Blank ballots \| 3,907	0.63	style="color:red;"\| –0.11 \| bgcolor="#E9E9E9" colspan="2"\|
colspan="7" bgcolor="#E9E9E9"\|
style="font-weight:bold;" \| align="left" colspan="2"\| Total \| 621,219	bgcolor="#E9E9E9" colspan="2"\| \| 8	±0
colspan="7" bgcolor="#E9E9E9"\|
align="left" colspan="2"\| Valid votes \| 621,219	98.32	style="color:green;"\| +0.03 \| bgcolor="#E9E9E9" colspan="2" rowspan="5"\|
align="left" colspan="2"\| Invalid votes \| 4,225	0.68	style="color:red;"\| –0.03
style="font-weight:bold;" \| align="left" colspan="2"\| Votes cast / turnout \| 625,444	65.97	style="color:red;"\| –3.44
align="left" colspan="2"\| Abstentions \| 322,636	34.03	style="color:green;"\| +3.44
style="font-weight:bold;" \| align="left" colspan="2"\| Registered voters \| 948,080	bgcolor="#E9E9E9" colspan="2"\|
colspan="7" bgcolor="#E9E9E9"\|
align="left" colspan="7"\| Sources
colspan="7" style="text-align:left; max-width:790px;"\| {{hidden\|ta1=left\|title=Footnotes:\|content={{ubl \| ¹ United We Can results are compared to the combined totals of We Can and United Left–Popular Unity in Common in the 2015 election.}}}}

=2015 general election=

style="text-align:left;" rowspan="2" colspan="2" width="525"\| Parties and alliances ! colspan="3"\| Popular vote ! colspan="2"\| Seats
class="wikitable" style="text-align:right;" \|+ Summary of the 20 December 2015 Congress of Deputies election results in Biscay
width="75"\| Votes ! width="45"\| % ! width="45"\| ±pp ! width="35"\| Total ! width="35"\| +/−
width="1" style="color:inherit;background:{{party color\|Basque Nationalist Party}}"\| \| align="left"\| Basque Nationalist Party (EAJ/PNV) \| 182,604	27.91	style="color:red;"\| –4.70 \| 3	±0
style="color:inherit;background:{{party color\|Podemos (Spanish political party)}}"\| \| align="left"\| We Can (Podemos/Ahal Dugu) \| 170,728	26.10	New \| 2	style="color:green;"\| +2
style="color:inherit;background:{{party color\|Socialist Party of the Basque Country–Basque Country Left}}"\| \| align="left"\| Socialist Party of the Basque Country–Basque Country Left (PSE–EE (PSOE)) \| 84,893	12.98	style="color:red;"\| –8.41 \| 1	style="color:red;"\| –1
style="color:inherit;background:{{party color\|EH Bildu}}"\| \| align="left"\| Basque Country Gather (EH Bildu)¹ \| 81,704	12.49	style="color:red;"\| –6.70 \| 1	style="color:red;"\| –1
style="color:inherit;background:{{party color\|People's Party (Spain)}}"\| \| align="left"\| People's Party (PP) \| 74,560	11.40	style="color:red;"\| –6.32 \| 1	±0
style="color:inherit;background:{{party color\|Citizens (Spanish political party)}}"\| \| align="left"\| Citizens–Party of the Citizenry (C's) \| 25,148	3.84	New \| 0	±0
colspan="7" bgcolor="#C0C0C0"\|
style="color:inherit;background:{{party color\|Popular Unity (Spain)}}"\| \| align="left"\| United Left–Popular Unity in Common (IU–UPeC) \| 18,466	2.82	style="color:red;"\| –0.96 \| 0	±0
style="color:inherit;background:{{party color\|Animalist Party Against Mistreatment of Animals}}"\| \| align="left"\| Animalist Party Against Mistreatment of Animals (PACMA) \| 4,342	0.66	style="color:green;"\| +0.15 \| 0	±0
style="color:inherit;background:{{party color\|Union, Progress and Democracy}}"\| \| align="left"\| Union, Progress and Democracy (UPyD) \| 2,012	0.31	style="color:red;"\| –1.39 \| 0	±0
style="color:inherit;background:{{party color\|For the Left (Spain)}}"\| \| align="left"\| Left–For the Left (Ezkerra) \| 1,447	0.22	New \| 0	±0
style="color:inherit;background:{{party color\|Zero Cuts}}"\| \| align="left"\| Zero Cuts–Green Group (Recortes Cero–GV) \| 1,089	0.17	New \| 0	±0
style="color:inherit;background:{{party color\|Blank Seats}}"\| \| align="left"\| Blank Seats (EB/AZ) \| 1,045	0.16	style="color:red;"\| –0.29 \| 0	±0
style="color:inherit;background:{{party color\|For a Fairer World}}"\| \| align="left"\| For a Fairer World (PUM+J) \| 479	0.07	style="color:red;"\| –0.19 \| 0	±0
style="color:inherit;background:{{party color\|Communist Party of the Peoples of Spain}}"\| \| align="left"\| Communist Party of the Peoples of Spain (PCPE) \| 414	0.06	New \| 0	±0
style="color:inherit;background:{{party color\|Social Justice, Citizen Participation}}"\| \| align="left"\| Social Justice, Citizen Participation (JS,PC) \| 406	0.06	New \| 0	±0
align="left" colspan="2"\| Blank ballots \| 4,840	0.74	style="color:red;"\| –0.40 \| bgcolor="#E9E9E9" colspan="2"\|
colspan="7" bgcolor="#E9E9E9"\|
style="font-weight:bold;" \| align="left" colspan="2"\| Total \| 654,177	bgcolor="#E9E9E9" colspan="2"\| \| 8	±0
colspan="7" bgcolor="#E9E9E9"\|
align="left" colspan="2"\| Valid votes \| 654,177	99.29	style="color:green;"\| +0.30 \| bgcolor="#E9E9E9" colspan="2" rowspan="5"\|
align="left" colspan="2"\| Invalid votes \| 4,647	0.71	style="color:red;"\| –0.30
style="font-weight:bold;" \| align="left" colspan="2"\| Votes cast / turnout \| 658,824	69.41	style="color:green;"\| +1.33
align="left" colspan="2"\| Abstentions \| 290,353	30.59	style="color:red;"\| –1.33
style="font-weight:bold;" \| align="left" colspan="2"\| Registered voters \| 949,177	bgcolor="#E9E9E9" colspan="2"\|
colspan="7" bgcolor="#E9E9E9"\|
align="left" colspan="7"\| Sources
colspan="7" style="text-align:left; max-width:790px;"\| {{hidden\|ta1=left\|title=Footnotes:\|content={{ubl \| ¹ Basque Country Gather results are compared to Amaiur totals in the 2011 election.}}}}

=2011 general election=

style="text-align:left;" rowspan="2" colspan="2" width="525"\| Parties and alliances ! colspan="3"\| Popular vote ! colspan="2"\| Seats
class="wikitable" style="text-align:right;" \|+ Summary of the 20 November 2011 Congress of Deputies election results in Biscay
width="75"\| Votes ! width="45"\| % ! width="45"\| ±pp ! width="35"\| Total ! width="35"\| +/−
width="1" style="color:inherit;background:{{party color\|Basque Nationalist Party}}"\| \| align="left"\| Basque Nationalist Party (EAJ/PNV) \| 208,683	32.61	style="color:green;"\| +1.51 \| 3	±0
style="color:inherit;background:{{party color\|Socialist Party of the Basque Country–Basque Country Left}}"\| \| align="left"\| Socialist Party of the Basque Country–Basque Country Left (PSE–EE (PSOE)) \| 136,853	21.39	style="color:red;"\| –15.60 \| 2	style="color:red;"\| –2
style="color:inherit;background:{{party color\|Amaiur}}"\| \| align="left"\| Amaiur (Amaiur)¹ \| 122,796	19.19	style="color:green;"\| +14.54 \| 2	style="color:green;"\| +2
style="color:inherit;background:{{party color\|People's Party (Spain)}}"\| \| align="left"\| People's Party (PP) \| 113,401	17.72	style="color:red;"\| –0.68 \| 1	±0
style="color:inherit;background:{{party color\|Plural Left (Spain, 2011)}}"\| \| align="left"\| United Left–The Greens: Plural Left (IU–LV) \| 24,205	3.78	style="color:red;"\| –0.57 \| 0	±0
colspan="7" bgcolor="#C0C0C0"\|
style="color:inherit;background:{{party color\|Union, Progress and Democracy}}"\| \| align="left"\| Union, Progress and Democracy (UPyD) \| 10,886	1.70	style="color:green;"\| +0.75 \| 0	±0
style="color:inherit;background:{{party color\|Equo}}"\| \| align="left"\| Equo (Equo) \| 7,387	1.15	New \| 0	±0
style="color:inherit;background:{{party color\|Animalist Party Against Mistreatment of Animals}}"\| \| align="left"\| Animalist Party Against Mistreatment of Animals (PACMA) \| 3,278	0.51	style="color:green;"\| +0.14 \| 0	±0
style="color:inherit;background:{{party color\|Blank Seats}}"\| \| align="left"\| Blank Seats (EB) \| 2,886	0.45	New \| 0	±0
style="color:inherit;background:{{party color\|For a Fairer World}}"\| \| align="left"\| For a Fairer World (PUM+J) \| 1,670	0.26	style="color:green;"\| +0.03 \| 0	±0
style="color:inherit;background:{{party color\|Communist Unification of Spain}}"\| \| align="left"\| Communist Unification of Spain (UCE) \| 550	0.09	New \| 0	±0
align="left" colspan="2"\| Blank ballots \| 7,285	1.14	style="color:red;"\| –0.54 \| bgcolor="#E9E9E9" colspan="2"\|
colspan="7" bgcolor="#E9E9E9"\|
style="font-weight:bold;" \| align="left" colspan="2"\| Total \| 639,880	bgcolor="#E9E9E9" colspan="2"\| \| 8	±0
colspan="7" bgcolor="#E9E9E9"\|
align="left" colspan="2"\| Valid votes \| 639,880	98.99	style="color:red;"\| –0.04 \| bgcolor="#E9E9E9" colspan="2" rowspan="5"\|
align="left" colspan="2"\| Invalid votes \| 6,552	1.01	style="color:green;"\| +0.04
style="font-weight:bold;" \| align="left" colspan="2"\| Votes cast / turnout \| 646,432	68.08	style="color:green;"\| +1.49
align="left" colspan="2"\| Abstentions \| 303,039	31.92	style="color:red;"\| –1.49
style="font-weight:bold;" \| align="left" colspan="2"\| Registered voters \| 949,471	bgcolor="#E9E9E9" colspan="2"\|
colspan="7" bgcolor="#E9E9E9"\|
align="left" colspan="7"\| Sources
colspan="7" style="text-align:left; max-width:790px;"\| {{hidden\|ta1=left\|title=Footnotes:\|content={{ubl \| ¹ Amaiur results are compared to the combined totals of Basque Solidarity and Aralar in the 2008 election.}}}}

=2008 general election=

style="text-align:left;" rowspan="2" colspan="2" width="525"\| Parties and alliances ! colspan="3"\| Popular vote ! colspan="2"\| Seats
class="wikitable" style="text-align:right;" \|+ Summary of the 9 March 2008 Congress of Deputies election results in Biscay
width="75"\| Votes ! width="45"\| % ! width="45"\| ±pp ! width="35"\| Total ! width="35"\| +/−
width="1" style="color:inherit;background:{{party color\|Socialist Party of the Basque Country–Basque Country Left}}"\| \| align="left"\| Socialist Party of the Basque Country–Basque Country Left (PSE–EE (PSOE)) \| 233,371	36.99	style="color:green;"\| +10.23 \| 4	style="color:green;"\| +1
style="color:inherit;background:{{party color\|Basque Nationalist Party}}"\| \| align="left"\| Basque Nationalist Party (EAJ/PNV) \| 196,242	31.10	style="color:red;"\| –6.19 \| 3	style="color:red;"\| –1
style="color:inherit;background:{{party color\|People's Party (Spain)}}"\| \| align="left"\| People's Party (PP) \| 116,110	18.40	style="color:red;"\| –0.34 \| 1	style="color:red;"\| –1
style="color:inherit;background:{{party color\|United Left–Greens}}"\| \| align="left"\| United Left–Greens–Alternative (EB–B) \| 27,471	4.35	style="color:red;"\| –4.23 \| 0	±0
style="color:inherit;background:{{party color\|Eusko Alkartasuna}}"\| \| align="left"\| Basque Solidarity (EA) \| 19,605	3.11	style="color:red;"\| –1.23 \| 0	±0
colspan="7" bgcolor="#C0C0C0"\|
style="color:inherit;background:{{party color\|Aralar (Basque political party)}}"\| \| align="left"\| Aralar (Aralar) \| 9,740	1.54	style="color:red;"\| –0.31 \| 0	±0
style="color:inherit;background:{{party color\|Union, Progress and Democracy}}"\| \| align="left"\| Union, Progress and Democracy (UPyD) \| 5,997	0.95	New \| 0	±0
style="color:inherit;background:{{party color\|Confederation of the Greens}}"\| \| align="left"\| The Greens (B/LV) \| 3,351	0.53	New \| 0	±0
style="color:inherit;background:{{party color\|Animalist Party Against Mistreatment of Animals}}"\| \| align="left"\| Anti-Bullfighting Party Against Mistreatment of Animals (PACMA) \| 2,343	0.37	New \| 0	±0
style="color:inherit;background:{{party color\|For a Fairer World}}"\| \| align="left"\| For a Fairer World (PUM+J) \| 1,466	0.23	New \| 0	±0
style="color:inherit;background:{{party color\|Internationalist Socialist Workers' Party}}"\| \| align="left"\| Internationalist Socialist Workers' Party (POSI) \| 998	0.16	style="color:red;"\| –0.08 \| 0	±0
style="color:inherit;background:{{party color\|Communist Party of the Peoples of Spain}}"\| \| align="left"\| Communist Party of the Peoples of Spain–Basque Communists (PCPE–EK) \| 799	0.13	New \| 0	±0
style="color:inherit;background:{{party color\|Engine and Sports Alternative}}"\| \| align="left"\| Engine and Sports Alternative (AMD) \| 617	0.10	New \| 0	±0
style="color:inherit;background:{{party color\|Family and Life Party}}"\| \| align="left"\| Family and Life Party (PFyV) \| 589	0.09	New \| 0	±0
style="color:inherit;background:{{party color\|Humanist Party (Spain)}}"\| \| align="left"\| Humanist Party (PH) \| 435	0.07	style="color:red;"\| –0.20 \| 0	±0
style="color:inherit;background:{{party color\|Citizens (Spanish political party)}}"\| \| align="left"\| Citizens–Party of the Citizenry (C's) \| 426	0.07	New \| 0	±0
style="color:inherit;background:{{party color\|Falange Española de las JONS (1976)}}"\| \| align="left"\| Spanish Phalanx of the CNSO (FE–JONS) \| 219	0.03	style="color:green;"\| +0.01 \| 0	±0
style="color:inherit;background:{{party color\|National Democracy (Spain)}}"\| \| align="left"\| National Democracy (DN) \| 191	0.03	style="color:red;"\| –0.02 \| 0	±0
style="color:inherit;background:{{party color\|Carlist Party}}"\| \| align="left"\| Carlist Party of the Basque Country–Carlist Party (EKA–PC) \| 166	0.03	style="color:red;"\| –0.01 \| 0	±0
style="color:inherit;background:{{party color\|Spanish Alternative}}"\| \| align="left"\| Spanish Alternative (AES) \| 113	0.02	New \| 0	±0
style="color:inherit;background:{{party color\|National Alliance (Spain)}}"\| \| align="left"\| National Alliance (AN) \| 87	0.01	New \| 0	±0
align="left" colspan="2"\| Blank ballots \| 10,581	1.68	style="color:green;"\| +0.42 \| bgcolor="#E9E9E9" colspan="2"\|
colspan="7" bgcolor="#E9E9E9"\|
style="font-weight:bold;" \| align="left" colspan="2"\| Total \| 630,917	bgcolor="#E9E9E9" colspan="2"\| \| 8	style="color:red;"\| –1
colspan="7" bgcolor="#E9E9E9"\|
align="left" colspan="2"\| Valid votes \| 630,917	99.03	style="color:green;"\| +5.25 \| bgcolor="#E9E9E9" colspan="2" rowspan="5"\|
align="left" colspan="2"\| Invalid votes \| 6,177	0.97	style="color:red;"\| –5.25
style="font-weight:bold;" \| align="left" colspan="2"\| Votes cast / turnout \| 637,094	66.59	style="color:red;"\| –9.24
align="left" colspan="2"\| Abstentions \| 319,615	33.41	style="color:green;"\| +9.24
style="font-weight:bold;" \| align="left" colspan="2"\| Registered voters \| 956,709	bgcolor="#E9E9E9" colspan="2"\|
colspan="7" bgcolor="#E9E9E9"\|
align="left" colspan="7"\| Sources

=2004 general election=

style="text-align:left;" rowspan="2" colspan="2" width="525"\| Parties and alliances ! colspan="3"\| Popular vote ! colspan="2"\| Seats
class="wikitable" style="text-align:right;" \|+ Summary of the 14 March 2004 Congress of Deputies election results in Biscay
width="75"\| Votes ! width="45"\| % ! width="45"\| ±pp ! width="35"\| Total ! width="35"\| +/−
width="1" style="color:inherit;background:{{party color\|Basque Nationalist Party}}"\| \| align="left"\| Basque Nationalist Party (EAJ/PNV) \| 258,488	37.29	style="color:green;"\| +3.08 \| 4	±0
style="color:inherit;background:{{party color\|Socialist Party of the Basque Country–Basque Country Left}}"\| \| align="left"\| Socialist Party of the Basque Country–Basque Country Left (PSE–EE (PSOE)) \| 185,514	26.76	style="color:green;"\| +3.90 \| 3	style="color:green;"\| +1
style="color:inherit;background:{{party color\|People's Party (Spain)}}"\| \| align="left"\| People's Party (PP) \| 129,889	18.74	style="color:red;"\| –8.52 \| 2	style="color:red;"\| –1
style="color:inherit;background:{{party color\|United Left (Spain)}}"\| \| align="left"\| United Left (EB/IU) \| 59,493	8.58	style="color:green;"\| +2.79 \| 0	±0
style="color:inherit;background:{{party color\|Eusko Alkartasuna}}"\| \| align="left"\| Basque Solidarity (EA) \| 30,096	4.34	style="color:red;"\| –0.74 \| 0	±0
colspan="7" bgcolor="#C0C0C0"\|
style="color:inherit;background:{{party color\|Aralar (Basque political party)}}"\| \| align="left"\| Aralar–Stand up (Aralar–Zutik) \| 12,791	1.85	New \| 0	±0
style="color:inherit;background:{{party color\|Party of the Democratic Karma}}"\| \| align="left"\| Party of the Democratic Karma (PKD) \| 2,300	0.33	style="color:red;"\| –0.09 \| 0	±0
style="color:inherit;background:{{party color\|Humanist Party (Spain)}}"\| \| align="left"\| Humanist Party (PH) \| 1,846	0.27	style="color:green;"\| +0.03 \| 0	±0
style="color:inherit;background:{{party color\|Internationalist Socialist Workers' Party}}"\| \| align="left"\| Internationalist Socialist Workers' Party (POSI) \| 1,682	0.24	style="color:green;"\| +0.14 \| 0	±0
style="color:inherit;background:{{party color\|Democratic and Social Centre (Spain)}}"\| \| align="left"\| Democratic and Social Centre (CDS) \| 789	0.11	style="color:green;"\| +0.06 \| 0	±0
style="color:inherit;background:{{party color\|Republican Left (Spain, 1977)}}"\| \| align="left"\| Republican Left (IR) \| 407	0.06	New \| 0	±0
style="color:inherit;background:{{party color\|National Democracy (Spain)}}"\| \| align="left"\| National Democracy (DN) \| 348	0.05	New \| 0	±0
style="color:inherit;background:{{party color\|Republican Social Movement}}"\| \| align="left"\| Republican Social Movement (MSR) \| 264	0.04	New \| 0	±0
style="color:inherit;background:{{party color\|Carlist Party}}"\| \| align="left"\| Carlist Party of the Basque Country–Carlist Party (EKA–PC) \| 243	0.04	New \| 0	±0
style="color:inherit;background:{{party color\|La Falange (1999)}}"\| \| align="left"\| The Phalanx (FE) \| 147	0.02	style="color:red;"\| –0.02 \| 0	±0
style="color:inherit;background:{{party color\|Falange Española de las JONS (1976)}}"\| \| align="left"\| Spanish Phalanx of the CNSO (FE–JONS)¹ \| 134	0.02	style="color:red;"\| –0.01 \| 0	±0
align="left" colspan="2"\| Blank ballots \| 8,754	1.26	style="color:red;"\| –1.44 \| bgcolor="#E9E9E9" colspan="2"\|
colspan="7" bgcolor="#E9E9E9"\|
style="font-weight:bold;" \| align="left" colspan="2"\| Total \| 693,185	bgcolor="#E9E9E9" colspan="2"\| \| 9	±0
colspan="7" bgcolor="#E9E9E9"\|
align="left" colspan="2"\| Valid votes \| 693,185	93.78	style="color:red;"\| –5.13 \| bgcolor="#E9E9E9" colspan="2" rowspan="5"\|
align="left" colspan="2"\| Invalid votes \| 45,979	6.22	style="color:green;"\| +5.13
style="font-weight:bold;" \| align="left" colspan="2"\| Votes cast / turnout \| 739,164	75.83	style="color:green;"\| +8.84
align="left" colspan="2"\| Abstentions \| 235,578	24.17	style="color:red;"\| –8.84
style="font-weight:bold;" \| align="left" colspan="2"\| Registered voters \| 974,742	bgcolor="#E9E9E9" colspan="2"\|
colspan="7" bgcolor="#E9E9E9"\|
align="left" colspan="7"\| Sources
colspan="7" style="text-align:left; max-width:790px;"\| {{hidden\|ta1=left\|title=Footnotes:\|content={{ubl \| ¹ Spanish Phalanx of the CNSO results are compared to Independent Spanish Phalanx–Phalanx 2000 totals in the 2000 election.}}}}

=2000 general election=

style="text-align:left;" rowspan="2" colspan="2" width="525"\| Parties and alliances ! colspan="3"\| Popular vote ! colspan="2"\| Seats
class="wikitable" style="text-align:right;" \|+ Summary of the 12 March 2000 Congress of Deputies election results in Biscay
width="75"\| Votes ! width="45"\| % ! width="45"\| ±pp ! width="35"\| Total ! width="35"\| +/−
width="1" style="color:inherit;background:{{party color\|Basque Nationalist Party}}"\| \| align="left"\| Basque Nationalist Party (EAJ/PNV) \| 222,479	34.21	style="color:green;"\| +5.01 \| 4	style="color:green;"\| +1
style="color:inherit;background:{{party color\|People's Party (Spain)}}"\| \| align="left"\| People's Party (PP) \| 177,272	27.26	style="color:green;"\| +8.82 \| 3	style="color:green;"\| +1
style="color:inherit;background:{{party color\|Socialist Party of the Basque Country–Basque Country Left}}"\| \| align="left"\| Socialist Party of the Basque Country–Basque Country Left (PSE–EE (PSOE)) \| 148,670	22.86	style="color:red;"\| –0.93 \| 2	±0
style="color:inherit;background:{{party color\|United Left (Spain)}}"\| \| align="left"\| United Left (EB/IU) \| 37,677	5.79	style="color:red;"\| –3.93 \| 0	style="color:red;"\| –1
style="color:inherit;background:{{party color\|Eusko Alkartasuna}}"\| \| align="left"\| Basque Solidarity (EA) \| 33,047	5.08	style="color:red;"\| –0.10 \| 0	±0
colspan="7" bgcolor="#C0C0C0"\|
style="color:inherit;background:{{party color\|Confederation of the Greens}}"\| \| align="left"\| The Greens (B/LV) \| 5,469	0.84	style="color:green;"\| +0.40 \| 0	±0
style="color:inherit;background:{{party color\|Party of the Democratic Karma}}"\| \| align="left"\| Party of the Democratic Karma (PKD) \| 2,759	0.42	New \| 0	±0
style="color:inherit;background:{{party color\|Humanist Party (Spain)}}"\| \| align="left"\| Humanist Party (PH) \| 1,579	0.24	style="color:green;"\| +0.18 \| 0	±0
style="color:inherit;background:{{party color\|Natural Law Party (Spain)}}"\| \| align="left"\| Natural Law Party (PLN) \| 1,025	0.16	New \| 0	±0
style="color:inherit;background:{{party color\|Internationalist Socialist Workers' Party}}"\| \| align="left"\| Internationalist Socialist Workers' Party (POSI) \| 662	0.10	New \| 0	±0
style="color:inherit;background:{{party color\|Communist Party of the Peoples of Spain}}"\| \| align="left"\| Communist Party of the Peoples of Spain (PCPE) \| 534	0.08	New \| 0	±0
style="color:inherit;background:{{party color\|Democratic and Social Centre (Spain)}}"\| \| align="left"\| Democratic and Social Centre–Centrist Union (CDS–UC) \| 348	0.05	style="color:red;"\| –0.01 \| 0	±0
style="color:inherit;background:{{party color\|Spanish Democratic Republican Action}}"\| \| align="left"\| Republican Action (AR) \| 281	0.04	New \| 0	±0
style="color:inherit;background:{{party color\|Spain 2000}}"\| \| align="left"\| Spain 2000 Platform (ES2000) \| 246	0.04	New \| 0	±0
style="color:inherit;background:{{party color\|La Falange (1999)}}"\| \| align="left"\| The Phalanx (FE) \| 243	0.04	New \| 0	±0
style="color:inherit;background:{{party color\|Carlist Party of Euskal Herria}}"\| \| align="left"\| Carlist Party (EKA) \| 182	0.03	New \| 0	±0
style="color:inherit;background:{{party color\|Falange Española Independiente}}"\| \| align="left"\| Independent Spanish Phalanx–Phalanx 2000 (FEI–FE 2000) \| 179	0.03	style="color:green;"\| +0.01 \| 0	±0
style="color:inherit;background:{{party color\|Internationalist Struggle}}"\| \| align="left"\| Internationalist Struggle (LI (LIT–CI)) \| 151	0.02	New \| 0	±0
style="color:inherit;background:{{party color\|Euskal Herritarrok}}"\| \| align="left"\| Basque Citizens (EH)¹ \| 0	0.00	style="color:red;"\| –9.94 \| 0	style="color:red;"\| –1
align="left" colspan="2"\| Blank ballots \| 17,584	2.70	style="color:green;"\| +1.40 \| bgcolor="#E9E9E9" colspan="2"\|
colspan="7" bgcolor="#E9E9E9"\|
style="font-weight:bold;" \| align="left" colspan="2"\| Total \| 650,387	bgcolor="#E9E9E9" colspan="2"\| \| 9	±0
colspan="7" bgcolor="#E9E9E9"\|
align="left" colspan="2"\| Valid votes \| 650,387	98.91	style="color:red;"\| –0.41 \| bgcolor="#E9E9E9" colspan="2" rowspan="5"\|
align="left" colspan="2"\| Invalid votes \| 7,138	1.09	style="color:green;"\| +0.41
style="font-weight:bold;" \| align="left" colspan="2"\| Votes cast / turnout \| 657,525	66.99	style="color:red;"\| –5.50
align="left" colspan="2"\| Abstentions \| 324,046	33.01	style="color:green;"\| +5.50
style="font-weight:bold;" \| align="left" colspan="2"\| Registered voters \| 981,571	bgcolor="#E9E9E9" colspan="2"\|
colspan="7" bgcolor="#E9E9E9"\|
align="left" colspan="7"\| Sources
colspan="7" style="text-align:left; max-width:790px;"\| {{hidden\|ta1=left\|title=Footnotes:\|content={{ubl \| ¹ Basque Citizens results are compared to Popular Unity totals in the 1996 election. EH called for election boycott and urged its supporters to abstain.}}}}

=1996 general election=

style="text-align:left;" rowspan="2" colspan="2" width="525"\| Parties and alliances ! colspan="3"\| Popular vote ! colspan="2"\| Seats
class="wikitable" style="text-align:right;" \|+ Summary of the 3 March 1996 Congress of Deputies election results in Biscay
width="75"\| Votes ! width="45"\| % ! width="45"\| ±pp ! width="35"\| Total ! width="35"\| +/−
width="1" style="color:inherit;background:{{party color\|Basque Nationalist Party}}"\| \| align="left"\| Basque Nationalist Party (EAJ/PNV) \| 204,056	29.20	style="color:red;"\| –0.34 \| 3	±0
style="color:inherit;background:{{party color\|Socialist Party of the Basque Country–Basque Country Left}}"\| \| align="left"\| Socialist Party of the Basque Country–Basque Country Left (PSE–EE (PSOE)) \| 166,293	23.79	style="color:red;"\| –1.08 \| 2	style="color:red;"\| –1
style="color:inherit;background:{{party color\|People's Party (Spain)}}"\| \| align="left"\| People's Party (PP) \| 128,904	18.44	style="color:green;"\| +3.15 \| 2	±0
style="color:inherit;background:{{party color\|Herri Batasuna}}"\| \| align="left"\| Popular Unity (HB) \| 69,472	9.94	style="color:red;"\| –2.58 \| 1	±0
style="color:inherit;background:{{party color\|United Left (Spain)}}"\| \| align="left"\| United Left (IU/EB) \| 67,954	9.72	style="color:green;"\| +2.67 \| 1	style="color:green;"\| +1
style="color:inherit;background:{{party color\|Eusko Alkartasuna}}"\| \| align="left"\| Basque Solidarity (EA) \| 36,234	5.18	style="color:red;"\| –1.13 \| 0	±0
colspan="7" bgcolor="#C0C0C0"\|
style="color:inherit;background:{{party color\|Basque Citizen Initiative}}"\| \| align="left"\| Basque Citizen Initiative (ICV–Gorordo) \| 11,833	1.69	New \| 0	±0
style="color:inherit;background:{{party color\|Confederation of the Greens}}"\| \| align="left"\| European Greens–Basque Country Greens (VE–EHB) \| 774	0.44	style="color:red;"\| –0.57 \| 0	±0
style="color:inherit;background:{{party color\|Workers' Revolutionary Party (Spain)}}"\| \| align="left"\| Workers' Revolutionary Party (PRT)¹ \| 560	0.08	style="color:red;"\| –0.38 \| 0	±0
style="color:inherit;background:{{party color\|Democratic and Social Centre (Spain)}}"\| \| align="left"\| Centrist Union (UC) \| 430	0.06	style="color:red;"\| –0.73 \| 0	±0
style="color:inherit;background:{{party color\|Humanist Party (Spain)}}"\| \| align="left"\| Humanist Party (PH) \| 394	0.06	style="color:green;"\| +0.01 \| 0	±0
style="color:inherit;background:{{party color\|Republican Coalition (Spain, 1996)}}"\| \| align="left"\| Republican Coalition (CR)² \| 331	0.05	style="color:green;"\| +0.01 \| 0	±0
style="color:inherit;background:{{party color\|Falange Española Auténtica}}"\| \| align="left"\| Authentic Spanish Phalanx (FEA) \| 139	0.02	New \| 0	±0
style="color:inherit;background:{{party color\|Falange Española Independiente}}"\| \| align="left"\| Independent Spanish Phalanx (FEI) \| 138	0.02	New \| 0	±0
style="color:inherit;background:{{party color\|Revolutionary Workers' Party (Spain)}}"\| \| align="left"\| Revolutionary Workers' Party (POR) \| 0	0.00	style="color:red;"\| –0.06 \| 0	±0
align="left" colspan="2"\| Blank ballots \| 9,063	1.30	style="color:green;"\| +0.09 \| bgcolor="#E9E9E9" colspan="2"\|
colspan="7" bgcolor="#E9E9E9"\|
style="font-weight:bold;" \| align="left" colspan="2"\| Total \| 698,859	bgcolor="#E9E9E9" colspan="2"\| \| 9	±0
colspan="7" bgcolor="#E9E9E9"\|
align="left" colspan="2"\| Valid votes \| 698,859	99.32	style="color:green;"\| +0.14 \| bgcolor="#E9E9E9" colspan="2" rowspan="5"\|
align="left" colspan="2"\| Invalid votes \| 4,770	0.68	style="color:red;"\| –0.14
style="font-weight:bold;" \| align="left" colspan="2"\| Votes cast / turnout \| 703,629	72.49	style="color:green;"\| +1.41
align="left" colspan="2"\| Abstentions \| 266,963	27.51	style="color:red;"\| –1.41
style="font-weight:bold;" \| align="left" colspan="2"\| Registered voters \| 970,592	bgcolor="#E9E9E9" colspan="2"\|
colspan="7" bgcolor="#E9E9E9"\|
align="left" colspan="7"\| Sources
colspan="7" style="text-align:left; max-width:790px;"\| {{hidden\|ta1=left\|title=Footnotes:\|content={{ubl \| ¹ Workers' Revolutionary Party results are compared to Workers' Socialist Party totals in the 1993 election. \| ² Republican Coalition results are compared to Coalition for a New Socialist Party totals in the 1993 election.}}}}

=1993 general election=

style="text-align:left;" rowspan="2" colspan="2" width="525"\| Parties and alliances ! colspan="3"\| Popular vote ! colspan="2"\| Seats
class="wikitable" style="text-align:right;" \|+ Summary of the 6 June 1993 Congress of Deputies election results in Biscay
width="75"\| Votes ! width="45"\| % ! width="45"\| ±pp ! width="35"\| Total ! width="35"\| +/−
width="1" style="color:inherit;background:{{party color\|Basque Nationalist Party}}"\| \| align="left"\| Basque Nationalist Party (EAJ/PNV) \| 197,392	29.54	style="color:green;"\| +1.63 \| 3	±0
style="color:inherit;background:{{party color\|Socialist Party of the Basque Country–Basque Country Left}}"\| \| align="left"\| Socialist Party of the Basque Country–Basque Country Left (PSE–EE (PSOE))¹ \| 166,172	24.87	style="color:red;"\| –3.81 \| 3	±0
style="color:inherit;background:{{party color\|People's Party (Spain)}}"\| \| align="left"\| People's Party (PP) \| 102,172	15.29	style="color:green;"\| +5.59 \| 2	style="color:green;"\| +1
style="color:inherit;background:{{party color\|Herri Batasuna}}"\| \| align="left"\| Popular Unity (HB) \| 83,644	12.52	style="color:red;"\| –2.53 \| 1	style="color:red;"\| –1
style="color:inherit;background:{{party color\|United Left (Spain)}}"\| \| align="left"\| United Left (IU/EB) \| 47,091	7.05	style="color:green;"\| +3.44 \| 0	±0
style="color:inherit;background:{{party color\|Eusko Alkartasuna}}"\| \| align="left"\| Basque Solidarity–Basque Left (EA–EuE) \| 42,175	6.31	style="color:red;"\| –1.56 \| 0	style="color:red;"\| –1
colspan="7" bgcolor="#C0C0C0"\|
style="color:inherit;background:{{party color\|Confederation of the Greens}}"\| \| align="left"\| The Greens (Berdeak/LV) \| 6,769	1.01	New \| 0	±0
style="color:inherit;background:{{party color\|Democratic and Social Centre (Spain)}}"\| \| align="left"\| Democratic and Social Centre (CDS) \| 5,285	0.79	style="color:red;"\| –2.65 \| 0	±0
style="color:inherit;background:{{party color\|The Ecologist Greens (Spain)}}"\| \| align="left"\| The Ecologists (LE) \| 3,215	0.48	style="color:red;"\| –0.59 \| 0	±0
style="color:inherit;background:{{party color\|Workers' Socialist Party (Spain)}}"\| \| align="left"\| Workers' Socialist Party (PST) \| 3,053	0.46	style="color:green;"\| +0.12 \| 0	±0
style="color:inherit;background:{{party color\|Ruiz-Mateos Group}}"\| \| align="left"\| Ruiz-Mateos Group–European Democratic Alliance (ARM–ADE) \| 1,359	0.20	style="color:red;"\| –0.56 \| 0	±0
bgcolor="white"\| \| align="left"\| Referendum Tolerant Independent Political Party (PITRCG) \| 408	0.06	New \| 0	±0
style="color:inherit;background:{{party color\|Revolutionary Workers' Party (Spain)}}"\| \| align="left"\| Revolutionary Workers' Party (POR) \| 405	0.06	style="color:red;"\| –0.02 \| 0	±0
style="color:inherit;background:{{party color\|Natural Law Party (Spain)}}"\| \| align="left"\| Natural Law Party (PLN) \| 387	0.06	New \| 0	±0
style="color:inherit;background:{{party color\|Humanist Party (Spain)}}"\| \| align="left"\| Humanist Party (PH) \| 353	0.05	style="color:red;"\| –0.03 \| 0	±0
style="color:inherit;background:{{party color\|Coalition for a New Socialist Party}}"\| \| align="left"\| Coalition for a New Socialist Party (CNPS)² \| 251	0.04	style="color:red;"\| –0.02 \| 0	±0
style="color:inherit;background:{{party color\|Communist Unification of Spain}}"\| \| align="left"\| Communist Unification of Spain (UCE) \| 0	0.00	New \| 0	±0
align="left" colspan="2"\| Blank ballots \| 8,060	1.21	style="color:green;"\| +0.53 \| bgcolor="#E9E9E9" colspan="2"\|
colspan="7" bgcolor="#E9E9E9"\|
style="font-weight:bold;" \| align="left" colspan="2"\| Total \| 668,191	bgcolor="#E9E9E9" colspan="2"\| \| 9	style="color:red;"\| –1
colspan="7" bgcolor="#E9E9E9"\|
align="left" colspan="2"\| Valid votes \| 668,191	99.18	style="color:green;"\| +0.15 \| bgcolor="#E9E9E9" colspan="2" rowspan="5"\|
align="left" colspan="2"\| Invalid votes \| 5,495	0.82	style="color:red;"\| –0.15
style="font-weight:bold;" \| align="left" colspan="2"\| Votes cast / turnout \| 673,686	71.08	style="color:green;"\| +3.79
align="left" colspan="2"\| Abstentions \| 274,085	28.92	style="color:red;"\| –3.79
style="font-weight:bold;" \| align="left" colspan="2"\| Registered voters \| 947,771	bgcolor="#E9E9E9" colspan="2"\|
colspan="7" bgcolor="#E9E9E9"\|
align="left" colspan="7"\| Sources
colspan="7" style="text-align:left; max-width:790px;"\| {{hidden\|ta1=left\|title=Footnotes:\|content={{ubl \| ¹ Socialist Party of the Basque Country–Basque Country Left results are compared to the combined totals of Socialist Party of the Basque Country and Basque Country Left in the 1989 election. \| ² Coalition for a New Socialist Party results are compared to Alliance for the Republic totals in the 1989 election.}}}}

=1989 general election=

style="text-align:left;" rowspan="2" colspan="2" width="525"\| Parties and alliances ! colspan="3"\| Popular vote ! colspan="2"\| Seats
class="wikitable" style="text-align:right;" \|+ Summary of the 29 October 1989 Congress of Deputies election results in Biscay
width="75"\| Votes ! width="45"\| % ! width="45"\| ±pp ! width="35"\| Total ! width="35"\| +/−
width="1" style="color:inherit;background:{{party color\|Basque Nationalist Party}}"\| \| align="left"\| Basque Nationalist Party (EAJ/PNV) \| 171,582	27.91	style="color:red;"\| –1.40 \| 3	±0
style="color:inherit;background:{{party color\|Socialist Party of the Basque Country}}"\| \| align="left"\| Socialist Party of the Basque Country (PSE–PSOE) \| 127,744	20.78	style="color:red;"\| –5.78 \| 2	style="color:red;"\| –1
style="color:inherit;background:{{party color\|Herri Batasuna}}"\| \| align="left"\| Popular Unity (HB) \| 92,493	15.05	style="color:red;"\| –0.86 \| 2	±0
style="color:inherit;background:{{party color\|People's Party (Spain)}}"\| \| align="left"\| People's Party (PP)¹ \| 59,632	9.70	style="color:red;"\| –0.97 \| 1	±0
style="color:inherit;background:{{party color\|Euskadiko Ezkerra}}"\| \| align="left"\| Basque Country Left (EE) \| 48,559	7.90	style="color:red;"\| –0.46 \| 1	±0
style="color:inherit;background:{{party color\|Eusko Alkartasuna}}"\| \| align="left"\| Basque Solidarity (EA) \| 48,355	7.87	New \| 1	style="color:green;"\| +1
style="color:inherit;background:{{party color\|United Left (Spain)}}"\| \| align="left"\| United Left (IU/EB) \| 22,169	3.61	style="color:green;"\| +2.03 \| 0	±0
style="color:inherit;background:{{party color\|Democratic and Social Centre (Spain)}}"\| \| align="left"\| Democratic and Social Centre (CDS) \| 21,144	3.44	style="color:red;"\| –1.51 \| 0	±0
colspan="7" bgcolor="#C0C0C0"\|
style="color:inherit;background:{{party color\|The Ecologist Greens (Spain)}}"\| \| align="left"\| The Ecologist Greens (LVE) \| 6,589	1.07	New \| 0	±0
style="color:inherit;background:{{party color\|Ruiz-Mateos Group}}"\| \| align="left"\| Ruiz-Mateos Group (Ruiz-Mateos) \| 4,682	0.76	New \| 0	±0
style="color:inherit;background:{{party color\|Workers' Party of Spain–Communist Unity}}"\| \| align="left"\| Workers' Party of the Basque Country–Basque Country Workers (PTE–EL)² \| 3,125	0.51	style="color:red;"\| –0.61 \| 0	±0
style="color:inherit;background:{{party color\|Workers' Socialist Party (Spain)}}"\| \| align="left"\| Workers' Socialist Party (PST) \| 2,099	0.34	style="color:red;"\| –0.10 \| 0	±0
style="color:inherit;background:{{party color\|Communist Party of the Peoples of Spain}}"\| \| align="left"\| Communist Party of the Peoples of Spain (PCPE) \| 546	0.09	New \| 0	±0
style="color:inherit;background:{{party color\|Humanist Party (Spain)}}"\| \| align="left"\| Humanist Party (PH) \| 521	0.08	New \| 0	±0
style="color:inherit;background:{{party color\|Revolutionary Workers' Party (Spain)}}"\| \| align="left"\| Revolutionary Workers' Party of Spain (PORE) \| 510	0.08	New \| 0	±0
style="color:inherit;background:{{party color\|Falange Española de las JONS (1976)}}"\| \| align="left"\| Spanish Phalanx of the CNSO (FE–JONS) \| 400	0.07	style="color:red;"\| –0.05 \| 0	±0
style="color:inherit;background:{{party color\|Alliance for the Republic (Spain)}}"\| \| align="left"\| Alliance for the Republic (AxR)³ \| 398	0.06	style="color:red;"\| –0.10 \| 0	±0
style="color:inherit;background:{{party color\|Communist Party of Spain (Marxist–Leninist) (historical)}}"\| \| align="left"\| Communist Party of Spain (Marxist–Leninist) (PCE (m–l))⁴ \| 0	0.00	style="color:red;"\| –0.12 \| 0	±0
style="color:inherit;background:{{party color\|Revolutionary Communist League (Spain)}}"\| \| align="left"\| Revolutionary Communist League–Communist Movement (LKI–EMK)⁵ \| 0	0.00	±0.00 \| 0	±0
align="left" colspan="2"\| Blank ballots \| 4,176	0.68	style="color:green;"\| +0.20 \| bgcolor="#E9E9E9" colspan="2"\|
colspan="7" bgcolor="#E9E9E9"\|
style="font-weight:bold;" \| align="left" colspan="2"\| Total \| 614,724	bgcolor="#E9E9E9" colspan="2"\| \| 10	±0
colspan="7" bgcolor="#E9E9E9"\|
align="left" colspan="2"\| Valid votes \| 614,724	99.03	style="color:green;"\| +1.04 \| bgcolor="#E9E9E9" colspan="2" rowspan="5"\|
align="left" colspan="2"\| Invalid votes \| 6,044	0.97	style="color:red;"\| –1.04
style="font-weight:bold;" \| align="left" colspan="2"\| Votes cast / turnout \| 620,768	67.29	style="color:red;"\| –1.03
align="left" colspan="2"\| Abstentions \| 301,825	32.71	style="color:green;"\| +1.03
style="font-weight:bold;" \| align="left" colspan="2"\| Registered voters \| 922,593	bgcolor="#E9E9E9" colspan="2"\|
colspan="7" bgcolor="#E9E9E9"\|
align="left" colspan="7"\| Sources
colspan="7" style="text-align:left; max-width:790px;"\| {{hidden\|ta1=left\|title=Footnotes:\|content={{ubl \| ¹ People's Party results are compared to People's Coalition totals in the 1986 election. \| ² Workers' Party of the Basque Country–Basque Country Workers results are compared to Communist Party of the Basque Country totals in the 1986 election. \| ³ Alliance for the Republic results are compared to Internationalist Socialist Workers' Party totals in the 1986 election. \| ⁴ Communist Party of Spain (Marxist–Leninist) results are compared to Republican Popular Unity totals in the 1986 election. \| ⁵ Revolutionary Communist League–Communist Movement results are compared to the combined totals of Communist Movement of the Basque Country and Revolutionary Communist League in the 1986 election.}}}}

=1986 general election=

style="text-align:left;" rowspan="2" colspan="2" width="525"\| Parties and alliances ! colspan="3"\| Popular vote ! colspan="2"\| Seats
class="wikitable" style="text-align:right;" \|+ Summary of the 22 June 1986 Congress of Deputies election results in Biscay
width="75"\| Votes ! width="45"\| % ! width="45"\| ±pp ! width="35"\| Total ! width="35"\| +/−
width="1" style="color:inherit;background:{{party color\|Basque Nationalist Party}}"\| \| align="left"\| Basque Nationalist Party (EAJ/PNV) \| 179,130	29.31	style="color:red;"\| –4.07 \| 3	style="color:red;"\| –1
style="color:inherit;background:{{party color\|Socialist Party of the Basque Country}}"\| \| align="left"\| Socialist Party of the Basque Country (PSE–PSOE) \| 162,323	26.56	style="color:red;"\| –3.08 \| 3	style="color:red;"\| –1
style="color:inherit;background:{{party color\|Herri Batasuna}}"\| \| align="left"\| Popular Unity (HB) \| 97,252	15.91	style="color:green;"\| +2.80 \| 2	style="color:green;"\| +1
style="color:inherit;background:{{party color\|People's Coalition (Spain)}}"\| \| align="left"\| People's Coalition (AP–PDP–PL)¹ \| 65,212	10.67	style="color:red;"\| –1.35 \| 1	±0
style="color:inherit;background:{{party color\|Euskadiko Ezkerra}}"\| \| align="left"\| Basque Country Left (EE) \| 51,090	8.36	style="color:green;"\| +1.80 \| 1	style="color:green;"\| +1
style="color:inherit;background:{{party color\|Democratic and Social Centre (Spain)}}"\| \| align="left"\| Democratic and Social Centre (CDS) \| 30,286	4.95	style="color:green;"\| +3.47 \| 0	±0
colspan="7" bgcolor="#C0C0C0"\|
style="color:inherit;background:{{party color\|United Left (Spain)}}"\| \| align="left"\| United Left (IU) \| 9,638	1.58	New \| 0	±0
style="color:inherit;background:{{party color\|Communist Party of the Basque Country}}"\| \| align="left"\| Communist Party of the Basque Country (PCE/EPK) \| 6,863	1.12	style="color:red;"\| –1.07 \| 0	±0
style="color:inherit;background:{{party color\|Workers' Socialist Party (Spain)}}"\| \| align="left"\| Workers' Socialist Party (PST) \| 2,659	0.44	style="color:red;"\| –0.13 \| 0	±0
style="color:inherit;background:{{party color\|Communist Unification of Spain}}"\| \| align="left"\| Communist Unification of Spain (UCE) \| 1,397	0.23	style="color:green;"\| +0.05 \| 0	±0
style="color:inherit;background:{{party color\|Internationalist Socialist Workers' Party}}"\| \| align="left"\| Internationalist Socialist Workers' Party (POSI) \| 981	0.16	New \| 0	±0
style="color:inherit;background:{{party color\|Falange Española de las JONS (1976)}}"\| \| align="left"\| Spanish Phalanx of the CNSO (FE–JONS) \| 751	0.12	New \| 0	±0
style="color:inherit;background:{{party color\|Republican Popular Unity}}"\| \| align="left"\| Republican Popular Unity (UPR)² \| 704	0.12	style="color:green;"\| +0.05 \| 0	±0
style="color:inherit;background:{{party color\|Communist Movement of Euskadi}}"\| \| align="left"\| Communist Movement of the Basque Country (EMK) \| 0	0.00	±0.00 \| 0	±0
style="color:inherit;background:{{party color\|Revolutionary Communist League (Spain)}}"\| \| align="left"\| Revolutionary Communist League (LKI) \| 0	0.00	±0.00 \| 0	±0
style="color:inherit;background:{{party color\|Party of the Communists of Catalonia}}"\| \| align="left"\| Party of the Communists of Catalonia (PCC) \| 0	0.00	New \| 0	±0
align="left" colspan="2"\| Blank ballots \| 2,935	0.48	style="color:red;"\| –0.02 \| bgcolor="#E9E9E9" colspan="2"\|
colspan="7" bgcolor="#E9E9E9"\|
style="font-weight:bold;" \| align="left" colspan="2"\| Total \| 611,221	bgcolor="#E9E9E9" colspan="2"\| \| 10	±0
colspan="7" bgcolor="#E9E9E9"\|
align="left" colspan="2"\| Valid votes \| 611,221	97.99	style="color:green;"\| +0.16 \| bgcolor="#E9E9E9" colspan="2" rowspan="5"\|
align="left" colspan="2"\| Invalid votes \| 12,549	2.01	style="color:red;"\| –0.16
style="font-weight:bold;" \| align="left" colspan="2"\| Votes cast / turnout \| 623,770	68.32	style="color:red;"\| –11.20
align="left" colspan="2"\| Abstentions \| 289,194	31.68	style="color:green;"\| +11.20
style="font-weight:bold;" \| align="left" colspan="2"\| Registered voters \| 912,964	bgcolor="#E9E9E9" colspan="2"\|
colspan="7" bgcolor="#E9E9E9"\|
align="left" colspan="7"\| Sources
colspan="7" style="text-align:left; max-width:790px;"\| {{hidden\|ta1=left\|title=Footnotes:\|content={{ubl \| ¹ People's Coalition results are compared to AP–PDP–PDL–UCD totals in the 1982 election. \| ² Republican Popular Unity results are compared to Communist Party of Spain (Marxist–Leninist) totals in the 1982 election.}}}}

=1982 general election=

style="text-align:left;" rowspan="2" colspan="2" width="525"\| Parties and alliances ! colspan="3"\| Popular vote ! colspan="2"\| Seats
class="wikitable" style="text-align:right;" \|+ Summary of the 28 October 1982 Congress of Deputies election results in Biscay
width="75"\| Votes ! width="45"\| % ! width="45"\| ±pp ! width="35"\| Total ! width="35"\| +/−
width="1" style="color:inherit;background:{{party color\|Basque Nationalist Party}}"\| \| align="left"\| Basque Nationalist Party (EAJ/PNV) \| 221,801	33.38	style="color:green;"\| +4.20 \| 4	±0
style="color:inherit;background:{{party color\|Socialist Party of the Basque Country}}"\| \| align="left"\| Socialist Party of the Basque Country (PSE–PSOE) \| 196,974	29.64	style="color:green;"\| +10.58 \| 4	style="color:green;"\| +2
style="color:inherit;background:{{party color\|Herri Batasuna}}"\| \| align="left"\| Popular Unity (HB) \| 87,100	13.11	style="color:red;"\| –1.40 \| 1	style="color:red;"\| –1
style="color:inherit;background:{{party color\|AP–PDP–PDL–UCD}}"\| \| align="left"\| Democratic Coalition (AP–PDP–PDL–UCD)¹ \| 79,866	12.02	style="color:red;"\| –8.20 \| 1	style="color:red;"\| –1
style="color:inherit;background:{{party color\|Euskadiko Ezkerra}}"\| \| align="left"\| Basque Country Left–Left for Socialism (EE) \| 43,591	6.56	style="color:green;"\| +0.71 \| 0	±0
colspan="7" bgcolor="#C0C0C0"\|
style="color:inherit;background:{{party color\|Communist Party of the Basque Country}}"\| \| align="left"\| Communist Party of the Basque Country (PCE/EPK) \| 14,537	2.19	style="color:red;"\| –3.58 \| 0	±0
style="color:inherit;background:{{party color\|Democratic and Social Centre (Spain)}}"\| \| align="left"\| Democratic and Social Centre (CDS) \| 9,815	1.48	New \| 0	±0
style="color:inherit;background:{{party color\|Workers' Socialist Party (Spain)}}"\| \| align="left"\| Workers' Socialist Party (PST) \| 3,815	0.57	New \| 0	±0
style="color:inherit;background:{{party color\|New Force (Spain)}}"\| \| align="left"\| New Force (FN)² \| 1,289	0.19	style="color:red;"\| –1.17 \| 0	±0
style="color:inherit;background:{{party color\|Communist Unification of Spain}}"\| \| align="left"\| Communist Unification of Spain (UCE) \| 1,225	0.18	New \| 0	±0
style="color:inherit;background:{{party color\|Unified Communist Party of Spain}}"\| \| align="left"\| Communist Unity Candidacy (CUC) \| 761	0.11	New \| 0	±0
style="color:inherit;background:{{party color\|Communist Party of Spain (Marxist–Leninist) (historical)}}"\| \| align="left"\| Communist Party of Spain (Marxist–Leninist) (PCE (m–l)) \| 478	0.07	New \| 0	±0
style="color:inherit;background:{{party color\|Revolutionary Communist League (Spain)}}"\| \| align="left"\| Revolutionary Communist League (LKI) \| 0	0.00	style="color:red;"\| –0.55 \| 0	±0
style="color:inherit;background:{{party color\|Socialist Action Party (Spain)}}"\| \| align="left"\| Socialist Party (PS)³ \| 0	0.00	style="color:red;"\| –0.75 \| 0	±0
style="color:inherit;background:{{party color\|Communist Workers League (Spain)}}"\| \| align="left"\| Communist League–Internationalist Socialist Workers' Coalition (LC (COSI)) \| 0	0.00	New \| 0	±0
style="color:inherit;background:{{party color\|Communist Movement of Euskadi}}"\| \| align="left"\| Communist Movement of the Basque Country (EMK) \| 0	0.00	style="color:red;"\| –1.32 \| 0	±0
align="left" colspan="2"\| Blank ballots \| 3,318	0.50	style="color:green;"\| +0.30 \| bgcolor="#E9E9E9" colspan="2"\|
colspan="7" bgcolor="#E9E9E9"\|
style="font-weight:bold;" \| align="left" colspan="2"\| Total \| 664,570	bgcolor="#E9E9E9" colspan="2"\| \| 10	±0
colspan="7" bgcolor="#E9E9E9"\|
align="left" colspan="2"\| Valid votes \| 664,570	97.83	style="color:green;"\| +0.04 \| bgcolor="#E9E9E9" colspan="2" rowspan="5"\|
align="left" colspan="2"\| Invalid votes \| 14,728	2.17	style="color:red;"\| –0.04
style="font-weight:bold;" \| align="left" colspan="2"\| Votes cast / turnout \| 679,298	79.52	style="color:green;"\| +14.19
align="left" colspan="2"\| Abstentions \| 174,906	20.48	style="color:red;"\| –14.19
style="font-weight:bold;" \| align="left" colspan="2"\| Registered voters \| 854,204	bgcolor="#E9E9E9" colspan="2"\|
colspan="7" bgcolor="#E9E9E9"\|
align="left" colspan="7"\| Sources
colspan="7" style="text-align:left; max-width:790px;"\| {{hidden\|ta1=left\|title=Footnotes:\|content={{ubl \| ¹ AP–PDP–PDL–UCD results are compared to the combined totals of the Foral Union of the Basque Country and Union of the Democratic Centre in the 1979 election. \| ² New Force results are compared to National Union totals in the 1979 election. \| ³ Socialist Party results are compared to Spanish Socialist Workers' Party (historical) totals in the 1979 election.}}}}

=1979 general election=

style="text-align:left;" rowspan="2" colspan="2" width="525"\| Parties and alliances ! colspan="3"\| Popular vote ! colspan="2"\| Seats
class="wikitable" style="text-align:right;" \|+ Summary of the 1 March 1979 Congress of Deputies election results in Biscay
width="75"\| Votes ! width="45"\| % ! width="45"\| ±pp ! width="35"\| Total ! width="35"\| +/−
width="1" style="color:inherit;background:{{party color\|Basque Nationalist Party}}"\| \| align="left"\| Basque Nationalist Party (EAJ/PNV) \| 161,480	29.18	style="color:red;"\| –1.74 \| 4	±0
style="color:inherit;background:{{party color\|Socialist Party of the Basque Country}}"\| \| align="left"\| Socialist Party of the Basque Country (PSE–PSOE)¹ \| 105,481	19.06	style="color:red;"\| –8.38 \| 2	style="color:red;"\| –1
style="color:inherit;background:{{party color\|Union of the Democratic Centre (Spain)}}"\| \| align="left"\| Union of the Democratic Centre (UCD) \| 88,431	15.98	style="color:red;"\| –0.43 \| 2	±0
style="color:inherit;background:{{party color\|Herri Batasuna}}"\| \| align="left"\| Popular Unity (HB)² \| 80,280	14.51	style="color:green;"\| +10.97 \| 2	style="color:green;"\| +2
style="color:inherit;background:{{party color\|Euskadiko Ezkerra}}"\| \| align="left"\| Basque Country Left (EE) \| 32,363	5.85	style="color:green;"\| +0.42 \| 0	±0
style="color:inherit;background:{{party color\|Communist Party of the Basque Country}}"\| \| align="left"\| Communist Party of the Basque Country (PCE/EPK) \| 31,942	5.77	style="color:green;"\| +0.38 \| 0	±0
style="color:inherit;background:{{party color\|Foral Union of the Basque Country}}"\| \| align="left"\| Foral Union of the Basque Country (UFPV)³ \| 23,484	4.24	style="color:red;"\| –2.40 \| 0	style="color:red;"\| –1
colspan="7" bgcolor="#C0C0C0"\|
style="color:inherit;background:{{party color\|National Union (Spain)}}"\| \| align="left"\| National Union (UN) \| 7,521	1.36	New \| 0	±0
style="color:inherit;background:{{party color\|Communist Movement (Spain)}}"\| \| align="left"\| Communist Movement–Organization of Communist Left (MC–OIC) \| 7,292	1.32	New \| 0	±0
style="color:inherit;background:{{party color\|Socialist Action Party (Spain)}}"\| \| align="left"\| Spanish Socialist Workers' Party (historical) (PSOEh)⁴ \| 4,131	0.75	style="color:red;"\| –0.37 \| 0	±0
style="color:inherit;background:{{party color\|Revolutionary Communist League (Spain)}}"\| \| align="left"\| Revolutionary Communist League (LCR)⁵ \| 3,039	0.55	style="color:red;"\| –0.26 \| 0	±0
style="color:inherit;background:{{party color\|Workers' Revolutionary Organization (Spain)}}"\| \| align="left"\| Workers' Revolutionary Organization (ORT)⁶ \| 2,932	0.53	style="color:green;"\| +0.02 \| 0	±0
style="color:inherit;background:{{party color\|Carlist Party (1970)}}"\| \| align="left"\| Carlist Party (PC) \| 1,380	0.25	New \| 0	±0
style="color:inherit;background:{{party color\|Republican Left (Spain, 1977)}}"\| \| align="left"\| Republican Left of the Basque Country (IR–E) \| 1,229	0.22	New \| 0	±0
style="color:inherit;background:{{party color\|Falange Española de las JONS (Auténtica)}}"\| \| align="left"\| Spanish Phalanx of the CNSO (Authentic) (FE–JONS(A)) \| 795	0.14	New \| 0	±0
style="color:inherit;background:{{party color\|Proverist Party}}"\| \| align="left"\| Proverist Party (PPr) \| 500	0.09	New \| 0	±0
bgcolor="white"\| \| align="left"\| Union for the Freedom of Speech (ULE) \| 0	0.00	New \| 0	±0
align="left" colspan="2"\| Blank ballots \| 1,127	0.20	style="color:red;"\| –0.01 \| bgcolor="#E9E9E9" colspan="2"\|
colspan="7" bgcolor="#E9E9E9"\|
style="font-weight:bold;" \| align="left" colspan="2"\| Total \| 553,407	bgcolor="#E9E9E9" colspan="2"\| \| 10	±0
colspan="7" bgcolor="#E9E9E9"\|
align="left" colspan="2"\| Valid votes \| 553,407	97.79	style="color:green;"\| +0.64 \| bgcolor="#E9E9E9" colspan="2" rowspan="5"\|
align="left" colspan="2"\| Invalid votes \| 12,478	2.21	style="color:red;"\| –0.64
style="font-weight:bold;" \| align="left" colspan="2"\| Votes cast / turnout \| 565,885	65.33	style="color:red;"\| –11.05
align="left" colspan="2"\| Abstentions \| 300,300	34.67	style="color:green;"\| +11.05
style="font-weight:bold;" \| align="left" colspan="2"\| Registered voters \| 866,185	bgcolor="#E9E9E9" colspan="2"\|
colspan="7" bgcolor="#E9E9E9"\|
align="left" colspan="7"\| Sources
colspan="7" style="text-align:left; max-width:790px;"\| {{hidden\|ta1=left\|title=Footnotes:\|content={{ubl \| ¹ Socialist Party of the Basque Country results are compared to the combined totals of Socialist Party of the Basque Country and People's Socialist Party–Socialist Unity in the 1977 election. \| ² Popular Unity results are compared to the combined totals of the Basque Socialist Party and Basque Nationalist Action in the 1977 election. \| ³ Foral Union of the Basque Country results are compared to People's Alliance totals in the 1977 election. \| ⁴ Spanish Socialist Workers' Party (historical) results are compared to Democratic Socialist Alliance totals in the 1977 election. \| ⁵ Revolutionary Communist League results are compared to Front for Workers' Unity totals in the 1977 election. \| ⁶ Workers' Revolutionary Organization results are compared to Workers' Electoral Group totals in the 1977 election.}}}}

=1977 general election=

style="text-align:left;" rowspan="2" colspan="2" width="525"\| Parties and alliances ! colspan="3"\| Popular vote ! colspan="2"\| Seats
class="wikitable" style="text-align:right;" \|+ Summary of the 15 June 1977 Congress of Deputies election results in Biscay
width="75"\| Votes ! width="45"\| % ! width="45"\| ±pp ! width="35"\| Total ! width="35"\| +/−
width="1" style="color:inherit;background:{{party color\|Basque Nationalist Party}}"\| \| align="left"\| Basque Nationalist Party (EAJ/PNV) \| 171,991	30.92	n/a \| 4	n/a
style="color:inherit;background:{{party color\|Socialist Party of the Basque Country}}"\| \| align="left"\| Socialist Party of the Basque Country (PSE–PSOE) \| 140,643	25.28	n/a \| 3	n/a
style="color:inherit;background:{{party color\|Union of the Democratic Centre (Spain)}}"\| \| align="left"\| Union of the Democratic Centre (UCD) \| 91,262	16.41	n/a \| 2	n/a
style="color:inherit;background:{{party color\|People's Alliance (Spain)}}"\| \| align="left"\| People's Alliance (AP) \| 36,934	6.64	n/a \| 1	n/a
style="color:inherit;background:{{party color\|Euskadiko Ezkerra}}"\| \| align="left"\| Basque Country Left (EE) \| 30,209	5.43	n/a \| 0	n/a
style="color:inherit;background:{{party color\|Communist Party of the Basque Country}}"\| \| align="left"\| Communist Party of the Basque Country (PCE/EPK) \| 29,968	5.39	n/a \| 0	n/a
colspan="7" bgcolor="#C0C0C0"\|
style="color:inherit;background:{{party color\|Basque Socialist Party}}"\| \| align="left"\| Basque Socialist Party (ESB/PSV) \| 15,079	2.71	n/a \| 0	n/a
style="color:inherit;background:{{party color\|People's Socialist Party (Spain)}}"\| \| align="left"\| People's Socialist Party–Socialist Unity (PSP–US) \| 12,038	2.16	n/a \| 0	n/a
style="color:inherit;background:{{party color\|Democratic Socialist Alliance (Spain)}}"\| \| align="left"\| Democratic Socialist Alliance (ASDCI) \| 6,224	1.12	n/a \| 0	n/a
style="color:inherit;background:{{party color\|Basque Christian Democracy}}"\| \| align="left"\| Basque Christian Democracy (DCV) \| 6,034	1.08	n/a \| 0	n/a
style="color:inherit;background:{{party color\|Basque Nationalist Action}}"\| \| align="left"\| Basque Nationalist Action (EAE/ANV) \| 4,617	0.83	n/a \| 0	n/a
style="color:inherit;background:{{party color\|Front for Workers' Unity}}"\| \| align="left"\| Front for Workers' Unity (FUT) \| 4,478	0.81	n/a \| 0	n/a
style="color:inherit;background:{{party color\|Workers' Revolutionary Organization (Spain)}}"\| \| align="left"\| Workers' Electoral Group (AET) \| 2,825	0.51	n/a \| 0	n/a
style="color:inherit;background:{{party color\|Democratic Left Front (Spain)}}"\| \| align="left"\| Democratic Left Front (FDI) \| 2,767	0.50	n/a \| 0	n/a
align="left" colspan="2"\| Blank ballots \| 1,166	0.21	n/a \| bgcolor="#E9E9E9" colspan="2"\|
colspan="7" bgcolor="#E9E9E9"\|
style="font-weight:bold;" \| align="left" colspan="2"\| Total \| 556,235	bgcolor="#E9E9E9" colspan="2"\| \| 10	n/a
colspan="7" bgcolor="#E9E9E9"\|
align="left" colspan="2"\| Valid votes \| 556,235	97.15	n/a \| bgcolor="#E9E9E9" colspan="2" rowspan="5"\|
align="left" colspan="2"\| Invalid votes \| 16,313	2.85	n/a
style="font-weight:bold;" \| align="left" colspan="2"\| Votes cast / turnout \| 572,548	76.38	n/a
align="left" colspan="2"\| Abstentions \| 177,024	23.62	n/a
style="font-weight:bold;" \| align="left" colspan="2"\| Registered voters \| 749,572	bgcolor="#E9E9E9" colspan="2"\|
colspan="7" bgcolor="#E9E9E9"\|
align="left" colspan="7"\| Sources

Notes

References

Bibliography

{{cite act |italics=y |title=Ley 1/1977, de 4 de enero, para la Reforma Política |type=Law |number=1/1977 |date=4 January 1977 |reporter=Boletín Oficial del Estado |volume=4 |issn=0212-033X |id=BOE-A-1977-165 |language=es |url=https://www.boe.es/buscar/doc.php?id=BOE-A-1977-165 |access-date=27 December 2016 |ref={{harvid|Law 1/1977|1977}}}}
{{cite act |italics=y |title=Real Decreto-ley 20/1977, de 18 de marzo, sobre Normas Electorales |type=Royal Decree-Law |number=20/1977 |date=18 March 1977 |reporter=Boletín Oficial del Estado |volume=70 |issn=0212-033X |id=BOE-A-1977-7445 |language=es |url=https://www.boe.es/buscar/doc.php?id=BOE-A-1977-7445 |access-date=27 December 2016 |ref={{harvid|RDL 20/1977|1977}}}}
{{cite act |italics=y |title=Constitución Española |type=Spanish Constitution |date=29 December 1978 |orig-date=latest version |reporter=Boletín Oficial del Estado |volume=311 |issn=0212-033X |id=BOE-A-1978-31229 |language=es |url=https://www.boe.es/buscar/act.php?id=BOE-A-1978-31229 |access-date=24 December 2024 |ref={{harvid|Const. Esp.|1978}}}}
{{cite act |italics=y |title=Ley Orgánica 5/1985, de 19 de junio, del Régimen Electoral General |type=Organic Law |number=5/1985 |date=19 June 1985 |orig-date=latest version |reporter=Boletín Oficial del Estado |volume=147 |issn=0212-033X |id=BOE-A-1985-11672 |language=es |url=https://www.boe.es/buscar/act.php?id=BOE-A-1985-11672 |access-date=24 December 2024 |ref={{harvid|LOREG|1985}}}}
{{cite book |last1=Carreras de Odriozola |first1=Albert |last2=Tafunell Sambola |first2=Xavier |year=2005 |orig-year=1989 |title=Estadísticas históricas de España, siglos XIX-XX |url=http://www.fbbva.es/TLFU/dat/autores.pdf |language=es |volume=1 |location=Bilbao |publisher=Fundación BBVA |pages=1072–1097 |edition=II |isbn=84-96515-00-1 |url-status=dead |archive-url=https://web.archive.org/web/20150924010950/http://www.fbbva.es/TLFU/dat/autores.pdf |archive-date=24 September 2015 |df=dmy-all}}

Category:Congress of Deputies constituencies (Spain)

Category:Biscay

Category:1977 establishments in Spain

Category:Constituencies established in 1977

Category:Basque politics

style="text-align:left;" rowspan="2" colspan="2" width="525"\| Parties and alliances ! colspan="3"\| Popular vote ! colspan="2"\| Seats
class="wikitable" style="text-align:right;" \|+ Summary of the 23 July 2023 Congress of Deputies election results in Biscay
width="75"\| Votes ! width="45"\| % ! width="45"\| ±pp ! width="35"\| Total ! width="35"\| +/−
width="1" style="color:inherit;background:{{party color\|Basque Nationalist Party}}"\| \| align="left"\| Basque Nationalist Party (EAJ/PNV) \| 164,188	26.93	style="color:red;"\| –8.29 \| 2	style="color:red;"\| –1
style="color:inherit;background:{{party color\|Socialist Party of the Basque Country–Basque Country Left}}"\| \| align="left"\| Socialist Party of the Basque Country–Basque Country Left (PSE–EE (PSOE)) \| 157,448	25.82	style="color:green;"\| +6.69 \| 2	±0
style="color:inherit;background:{{party color\|EH Bildu (2023)}}"\| \| align="left"\| Basque Country Gather (EH Bildu) \| 125,867	20.64	style="color:green;"\| +5.62 \| 2	style="color:green;"\| +1
style="color:inherit;background:{{party color\|People's Party (Spain)}}"\| \| align="left"\| People's Party (PP) \| 70,533	11.57	style="color:green;"\| +2.75 \| 1	±0
style="color:inherit;background:{{party color\|Sumar (electoral platform)}}"\| \| align="left"\| Unite (Sumar)¹ \| 66,592	10.92	style="color:red;"\| –5.85 \| 1	±0
colspan="7" bgcolor="#C0C0C0"\|
style="color:inherit;background:{{party color\|Vox (political party)}}"\| \| align="left"\| Vox (Vox) \| 16,069	2.64	style="color:green;"\| +0.22 \| 0	±0
style="color:inherit;background:{{party color\|Animalist Party with the Environment}}"\| \| align="left"\| Animalist Party with the Environment (PACMA)² \| 2,729	0.45	style="color:red;"\| –0.15 \| 0	±0
style="color:inherit;background:{{party color\|Workers' Front (Spain)}}"\| \| align="left"\| Workers' Front (FO) \| 929	0.15	New \| 0	±0
style="color:inherit;background:{{party color\|For a Fairer World}}"\| \| align="left"\| For a Fairer World (PUM+J) \| 804	0.13	style="color:green;"\| +0.05 \| 0	±0
style="color:inherit;background:{{party color\|Communist Party of the Workers of Spain}}"\| \| align="left"\| Communist Party of the Workers of the Basque Country (PCTE/ELAK) \| 618	0.10	style="color:green;"\| +0.02 \| 0	±0
style="color:inherit;background:{{party color\|Zero Cuts}}"\| \| align="left"\| Zero Cuts (Recortes Cero) \| 525	0.09	style="color:red;"\| –0.03 \| 0	±0
align="left" colspan="2"\| Blank ballots \| 3,391	0.56	style="color:red;"\| –0.04 \| bgcolor="#E9E9E9" colspan="2"\|
colspan="7" bgcolor="#E9E9E9"\|
style="font-weight:bold;" \| align="left" colspan="2"\| Total \| 609,693	bgcolor="#E9E9E9" colspan="2"\| \| 8	±0
colspan="7" bgcolor="#E9E9E9"\|
align="left" colspan="2"\| Valid votes \| 609,693	99.15	style="color:red;"\| –0.27 \| bgcolor="#E9E9E9" colspan="2" rowspan="5"\|
align="left" colspan="2"\| Invalid votes \| 5,251	0.85	style="color:green;"\| +0.27
style="font-weight:bold;" \| align="left" colspan="2"\| Votes cast / turnout \| 614,944	65.21	style="color:red;"\| –1.55
align="left" colspan="2"\| Abstentions \| 328,039	34.79	style="color:green;"\| +1.55
style="font-weight:bold;" \| align="left" colspan="2"\| Registered voters \| 942,983	bgcolor="#E9E9E9" colspan="2"\|
colspan="7" bgcolor="#E9E9E9"\|
align="left" colspan="7"\| Sources{{cite web \|url=https://infoelectoral.interior.gob.es/es/elecciones-celebradas/resultados-electorales/ \|title=Elecciones celebradas. Resultados electorales \|language=es \|website=Ministry of the Interior \|access-date=24 December 2024}}
colspan="7" style="text-align:left; max-width:790px;"\| {{hidden\|ta1=left\|title=Footnotes:\|content={{ubl \| ¹ Unite results are compared to the combined totals of United We Can and More Country–Ecologist Candidacy in the November 2019 election. \| ² Animalist Party with the Environment results are compared to Animalist Party Against Mistreatment of Animals totals in the November 2019 election.}}}}

style="text-align:left;" rowspan="2" colspan="2" width="525"\| Parties and alliances ! colspan="3"\| Popular vote ! colspan="2"\| Seats
class="wikitable" style="text-align:right;" \|+ Summary of the 10 November 2019 Congress of Deputies election results in Biscay
width="75"\| Votes ! width="45"\| % ! width="45"\| ±pp ! width="35"\| Total ! width="35"\| +/−
width="1" style="color:inherit;background:{{party color\|Basque Nationalist Party}}"\| \| align="left"\| Basque Nationalist Party (EAJ/PNV) \| 221,979	35.22	style="color:green;"\| +0.88 \| 3	±0
style="color:inherit;background:{{party color\|Socialist Party of the Basque Country–Basque Country Left}}"\| \| align="left"\| Socialist Party of the Basque Country–Basque Country Left (PSE–EE (PSOE)) \| 120,566	19.13	style="color:red;"\| –0.75 \| 2	±0
style="color:inherit;background:{{party color\|Unidas Podemos}}"\| \| align="left"\| United We Can (Podemos–IU) \| 97,125	15.41	style="color:red;"\| –2.31 \| 1	style="color:red;"\| –1
style="color:inherit;background:{{party color\|EH Bildu}}"\| \| align="left"\| Basque Country Gather (EH Bildu) \| 94,669	15.02	style="color:green;"\| +1.66 \| 1	±0
style="color:inherit;background:{{party color\|People's Party (Spain)}}"\| \| align="left"\| People's Party (PP) \| 55,621	8.82	style="color:green;"\| +1.56 \| 1	style="color:green;"\| +1
colspan="7" bgcolor="#C0C0C0"\|
style="color:inherit;background:{{party color\|Vox (political party)}}"\| \| align="left"\| Vox (Vox) \| 15,284	2.42	style="color:green;"\| +0.11 \| 0	±0
style="color:inherit;background:{{party color\|Más País}}"\| \| align="left"\| More Country–Ecologist Candidacy (Más País–Candidatura Ecologista) \| 8,542	1.36	New \| 0	±0
style="color:inherit;background:{{party color\|Citizens (Spanish political party)}}"\| \| align="left"\| Citizens–Party of the Citizenry (Cs) \| 6,929	1.10	style="color:red;"\| –2.01 \| 0	±0
style="color:inherit;background:{{party color\|Animalist Party Against Mistreatment of Animals}}"\| \| align="left"\| Animalist Party Against Mistreatment of Animals (PACMA) \| 3,783	0.60	style="color:red;"\| –0.30 \| 0	±0
style="color:inherit;background:{{party color\|Zero Cuts}}"\| \| align="left"\| Zero Cuts–Green Group (Recortes Cero–GV) \| 753	0.12	style="color:red;"\| –0.05 \| 0	±0
style="color:inherit;background:{{party color\|For a Fairer World}}"\| \| align="left"\| For a Fairer World (PUM+J) \| 494	0.08	style="color:red;"\| –0.04 \| 0	±0
style="color:inherit;background:{{party color\|Communist Party of the Workers of Spain}}"\| \| align="left"\| Communist Party of the Workers of the Basque Country (PCTE/ELAK) \| 491	0.08	style="color:red;"\| –0.01 \| 0	±0
style="color:inherit;background:{{party color\|Internationalist Solidarity and Self-Management}}"\| \| align="left"\| European Solidarity Action Party (Solidaria) \| 270	0.04	style="color:red;"\| –0.04 \| 0	±0
align="left" colspan="2"\| Blank ballots \| 3,806	0.60	style="color:red;"\| –0.06 \| bgcolor="#E9E9E9" colspan="2"\|
colspan="7" bgcolor="#E9E9E9"\|
style="font-weight:bold;" \| align="left" colspan="2"\| Total \| 630,312	bgcolor="#E9E9E9" colspan="2"\| \| 8	±0
colspan="7" bgcolor="#E9E9E9"\|
align="left" colspan="2"\| Valid votes \| 630,312	99.42	style="color:green;"\| +0.11 \| bgcolor="#E9E9E9" colspan="2" rowspan="5"\|
align="left" colspan="2"\| Invalid votes \| 3,665	0.58	style="color:red;"\| –0.11
style="font-weight:bold;" \| align="left" colspan="2"\| Votes cast / turnout \| 633,977	66.76	style="color:red;"\| –6.09
align="left" colspan="2"\| Abstentions \| 315,621	33.24	style="color:green;"\| +6.09
style="font-weight:bold;" \| align="left" colspan="2"\| Registered voters \| 949,598	bgcolor="#E9E9E9" colspan="2"\|
colspan="7" bgcolor="#E9E9E9"\|
align="left" colspan="7"\| Sources

style="text-align:left;" rowspan="2" colspan="2" width="525"\| Parties and alliances ! colspan="3"\| Popular vote ! colspan="2"\| Seats
class="wikitable" style="text-align:right;" \|+ Summary of the 28 April 2019 Congress of Deputies election results in Biscay
width="75"\| Votes ! width="45"\| % ! width="45"\| ±pp ! width="35"\| Total ! width="35"\| +/−
width="1" style="color:inherit;background:{{party color\|Basque Nationalist Party}}"\| \| align="left"\| Basque Nationalist Party (EAJ/PNV) \| 235,916	34.34	style="color:green;"\| +6.12 \| 3	style="color:green;"\| +1
style="color:inherit;background:{{party color\|Socialist Party of the Basque Country–Basque Country Left}}"\| \| align="left"\| Socialist Party of the Basque Country–Basque Country Left (PSE–EE (PSOE)) \| 136,547	19.88	style="color:green;"\| +5.97 \| 2	style="color:green;"\| +1
style="color:inherit;background:{{party color\|Unidas Podemos}}"\| \| align="left"\| United We Can (Podemos–IU–Equo Berdeak) \| 121,740	17.72	style="color:red;"\| –11.15 \| 2	style="color:red;"\| –1
style="color:inherit;background:{{party color\|EH Bildu}}"\| \| align="left"\| Basque Country Gather (EH Bildu) \| 91,771	13.36	style="color:green;"\| +2.47 \| 1	±0
style="color:inherit;background:{{party color\|People's Party (Spain)}}"\| \| align="left"\| People's Party (PP) \| 49,859	7.26	style="color:red;"\| –5.45 \| 0	style="color:red;"\| –1
style="color:inherit;background:{{party color\|Citizens (Spanish political party)}}"\| \| align="left"\| Citizens–Party of the Citizenry (Cs) \| 21,392	3.11	style="color:red;"\| –0.22 \| 0	±0
colspan="7" bgcolor="#C0C0C0"\|
style="color:inherit;background:{{party color\|Vox (political party)}}"\| \| align="left"\| Vox (Vox) \| 15,839	2.31	style="color:green;"\| +2.21 \| 0	±0
style="color:inherit;background:{{party color\|Animalist Party Against Mistreatment of Animals}}"\| \| align="left"\| Animalist Party Against Mistreatment of Animals (PACMA) \| 6,187	0.90	style="color:green;"\| +0.12 \| 0	±0
style="color:inherit;background:{{party color\|Zero Cuts}}"\| \| align="left"\| Zero Cuts–Green Group (Recortes Cero–GV) \| 1,177	0.17	style="color:red;"\| –0.02 \| 0	±0
style="color:inherit;background:{{party color\|For a Fairer World}}"\| \| align="left"\| For a Fairer World (PUM+J) \| 844	0.12	New \| 0	±0
style="color:inherit;background:{{party color\|Communist Party of the Workers of Spain}}"\| \| align="left"\| Communist Party of the Workers of the Basque Country (PCTE/ELAK) \| 603	0.09	New \| 0	±0
style="color:inherit;background:{{party color\|Internationalist Solidarity and Self-Management}}"\| \| align="left"\| European Solidarity Action Party (Solidaria) \| 528	0.08	New \| 0	±0
align="left" colspan="2"\| Blank ballots \| 4,557	0.66	style="color:green;"\| +0.03 \| bgcolor="#E9E9E9" colspan="2"\|
colspan="7" bgcolor="#E9E9E9"\|
style="font-weight:bold;" \| align="left" colspan="2"\| Total \| 686,960	bgcolor="#E9E9E9" colspan="2"\| \| 8	±0
colspan="7" bgcolor="#E9E9E9"\|
align="left" colspan="2"\| Valid votes \| 686,960	99.31	style="color:red;"\| –0.01 \| bgcolor="#E9E9E9" colspan="2" rowspan="5"\|
align="left" colspan="2"\| Invalid votes \| 4,742	0.69	style="color:green;"\| +0.01
style="font-weight:bold;" \| align="left" colspan="2"\| Votes cast / turnout \| 691,702	72.85	style="color:green;"\| +6.88
align="left" colspan="2"\| Abstentions \| 257,740	27.15	style="color:red;"\| –6.88
style="font-weight:bold;" \| align="left" colspan="2"\| Registered voters \| 949,442	bgcolor="#E9E9E9" colspan="2"\|
colspan="7" bgcolor="#E9E9E9"\|
align="left" colspan="7"\| Sources

style="text-align:left;" rowspan="2" colspan="2" width="525"\| Parties and alliances ! colspan="3"\| Popular vote ! colspan="2"\| Seats
class="wikitable" style="text-align:right;" \|+ Summary of the 26 June 2016 Congress of Deputies election results in Biscay
width="75"\| Votes ! width="45"\| % ! width="45"\| ±pp ! width="35"\| Total ! width="35"\| +/−
width="1" style="color:inherit;background:{{party color\|Unidos Podemos}}"\| \| align="left"\| United We Can (Podemos/Ahal Dugu–IU–Equo)¹ \| 179,347	28.87	style="color:red;"\| –0.05 \| 3	style="color:green;"\| +1
style="color:inherit;background:{{party color\|Basque Nationalist Party}}"\| \| align="left"\| Basque Nationalist Party (EAJ/PNV) \| 175,296	28.22	style="color:green;"\| +0.31 \| 2	style="color:red;"\| –1
style="color:inherit;background:{{party color\|Socialist Party of the Basque Country–Basque Country Left}}"\| \| align="left"\| Socialist Party of the Basque Country–Basque Country Left (PSE–EE (PSOE)) \| 86,425	13.91	style="color:green;"\| +0.93 \| 1	±0
style="color:inherit;background:{{party color\|People's Party (Spain)}}"\| \| align="left"\| People's Party (PP) \| 78,965	12.71	style="color:green;"\| +1.31 \| 1	±0
style="color:inherit;background:{{party color\|EH Bildu}}"\| \| align="left"\| Basque Country Gather (EH Bildu) \| 67,653	10.89	style="color:red;"\| –1.60 \| 1	±0
style="color:inherit;background:{{party color\|Citizens (Spanish political party)}}"\| \| align="left"\| Citizens–Party of the Citizenry (C's) \| 20,685	3.33	style="color:red;"\| –0.51 \| 0	±0
colspan="7" bgcolor="#C0C0C0"\|
style="color:inherit;background:{{party color\|Animalist Party Against Mistreatment of Animals}}"\| \| align="left"\| Animalist Party Against Mistreatment of Animals (PACMA) \| 4,865	0.78	style="color:green;"\| +0.12 \| 0	±0
style="color:inherit;background:{{party color\|Zero Cuts}}"\| \| align="left"\| Zero Cuts–Green Group (Recortes Cero–GV) \| 1,176	0.19	style="color:green;"\| +0.02 \| 0	±0
style="color:inherit;background:{{party color\|Blank Seats}}"\| \| align="left"\| Blank Seats (EB/AZ) \| 1,026	0.17	style="color:green;"\| +0.01 \| 0	±0
style="color:inherit;background:{{party color\|Union, Progress and Democracy}}"\| \| align="left"\| Union, Progress and Democracy (UPyD) \| 766	0.12	style="color:red;"\| –0.19 \| 0	±0
style="color:inherit;background:{{party color\|Vox (political party)}}"\| \| align="left"\| Vox (Vox) \| 641	0.10	New \| 0	±0
style="color:inherit;background:{{party color\|Communist Party of the Peoples of Spain}}"\| \| align="left"\| Communist Party of the Peoples of Spain (PCPE) \| 467	0.08	style="color:green;"\| +0.02 \| 0	±0
align="left" colspan="2"\| Blank ballots \| 3,907	0.63	style="color:red;"\| –0.11 \| bgcolor="#E9E9E9" colspan="2"\|
colspan="7" bgcolor="#E9E9E9"\|
style="font-weight:bold;" \| align="left" colspan="2"\| Total \| 621,219	bgcolor="#E9E9E9" colspan="2"\| \| 8	±0
colspan="7" bgcolor="#E9E9E9"\|
align="left" colspan="2"\| Valid votes \| 621,219	98.32	style="color:green;"\| +0.03 \| bgcolor="#E9E9E9" colspan="2" rowspan="5"\|
align="left" colspan="2"\| Invalid votes \| 4,225	0.68	style="color:red;"\| –0.03
style="font-weight:bold;" \| align="left" colspan="2"\| Votes cast / turnout \| 625,444	65.97	style="color:red;"\| –3.44
align="left" colspan="2"\| Abstentions \| 322,636	34.03	style="color:green;"\| +3.44
style="font-weight:bold;" \| align="left" colspan="2"\| Registered voters \| 948,080	bgcolor="#E9E9E9" colspan="2"\|
colspan="7" bgcolor="#E9E9E9"\|
align="left" colspan="7"\| Sources
colspan="7" style="text-align:left; max-width:790px;"\| {{hidden\|ta1=left\|title=Footnotes:\|content={{ubl \| ¹ United We Can results are compared to the combined totals of We Can and United Left–Popular Unity in Common in the 2015 election.}}}}

style="text-align:left;" rowspan="2" colspan="2" width="525"\| Parties and alliances ! colspan="3"\| Popular vote ! colspan="2"\| Seats
class="wikitable" style="text-align:right;" \|+ Summary of the 20 December 2015 Congress of Deputies election results in Biscay
width="75"\| Votes ! width="45"\| % ! width="45"\| ±pp ! width="35"\| Total ! width="35"\| +/−
width="1" style="color:inherit;background:{{party color\|Basque Nationalist Party}}"\| \| align="left"\| Basque Nationalist Party (EAJ/PNV) \| 182,604	27.91	style="color:red;"\| –4.70 \| 3	±0
style="color:inherit;background:{{party color\|Podemos (Spanish political party)}}"\| \| align="left"\| We Can (Podemos/Ahal Dugu) \| 170,728	26.10	New \| 2	style="color:green;"\| +2
style="color:inherit;background:{{party color\|Socialist Party of the Basque Country–Basque Country Left}}"\| \| align="left"\| Socialist Party of the Basque Country–Basque Country Left (PSE–EE (PSOE)) \| 84,893	12.98	style="color:red;"\| –8.41 \| 1	style="color:red;"\| –1
style="color:inherit;background:{{party color\|EH Bildu}}"\| \| align="left"\| Basque Country Gather (EH Bildu)¹ \| 81,704	12.49	style="color:red;"\| –6.70 \| 1	style="color:red;"\| –1
style="color:inherit;background:{{party color\|People's Party (Spain)}}"\| \| align="left"\| People's Party (PP) \| 74,560	11.40	style="color:red;"\| –6.32 \| 1	±0
style="color:inherit;background:{{party color\|Citizens (Spanish political party)}}"\| \| align="left"\| Citizens–Party of the Citizenry (C's) \| 25,148	3.84	New \| 0	±0
colspan="7" bgcolor="#C0C0C0"\|
style="color:inherit;background:{{party color\|Popular Unity (Spain)}}"\| \| align="left"\| United Left–Popular Unity in Common (IU–UPeC) \| 18,466	2.82	style="color:red;"\| –0.96 \| 0	±0
style="color:inherit;background:{{party color\|Animalist Party Against Mistreatment of Animals}}"\| \| align="left"\| Animalist Party Against Mistreatment of Animals (PACMA) \| 4,342	0.66	style="color:green;"\| +0.15 \| 0	±0
style="color:inherit;background:{{party color\|Union, Progress and Democracy}}"\| \| align="left"\| Union, Progress and Democracy (UPyD) \| 2,012	0.31	style="color:red;"\| –1.39 \| 0	±0
style="color:inherit;background:{{party color\|For the Left (Spain)}}"\| \| align="left"\| Left–For the Left (Ezkerra) \| 1,447	0.22	New \| 0	±0
style="color:inherit;background:{{party color\|Zero Cuts}}"\| \| align="left"\| Zero Cuts–Green Group (Recortes Cero–GV) \| 1,089	0.17	New \| 0	±0
style="color:inherit;background:{{party color\|Blank Seats}}"\| \| align="left"\| Blank Seats (EB/AZ) \| 1,045	0.16	style="color:red;"\| –0.29 \| 0	±0
style="color:inherit;background:{{party color\|For a Fairer World}}"\| \| align="left"\| For a Fairer World (PUM+J) \| 479	0.07	style="color:red;"\| –0.19 \| 0	±0
style="color:inherit;background:{{party color\|Communist Party of the Peoples of Spain}}"\| \| align="left"\| Communist Party of the Peoples of Spain (PCPE) \| 414	0.06	New \| 0	±0
style="color:inherit;background:{{party color\|Social Justice, Citizen Participation}}"\| \| align="left"\| Social Justice, Citizen Participation (JS,PC) \| 406	0.06	New \| 0	±0
align="left" colspan="2"\| Blank ballots \| 4,840	0.74	style="color:red;"\| –0.40 \| bgcolor="#E9E9E9" colspan="2"\|
colspan="7" bgcolor="#E9E9E9"\|
style="font-weight:bold;" \| align="left" colspan="2"\| Total \| 654,177	bgcolor="#E9E9E9" colspan="2"\| \| 8	±0
colspan="7" bgcolor="#E9E9E9"\|
align="left" colspan="2"\| Valid votes \| 654,177	99.29	style="color:green;"\| +0.30 \| bgcolor="#E9E9E9" colspan="2" rowspan="5"\|
align="left" colspan="2"\| Invalid votes \| 4,647	0.71	style="color:red;"\| –0.30
style="font-weight:bold;" \| align="left" colspan="2"\| Votes cast / turnout \| 658,824	69.41	style="color:green;"\| +1.33
align="left" colspan="2"\| Abstentions \| 290,353	30.59	style="color:red;"\| –1.33
style="font-weight:bold;" \| align="left" colspan="2"\| Registered voters \| 949,177	bgcolor="#E9E9E9" colspan="2"\|
colspan="7" bgcolor="#E9E9E9"\|
align="left" colspan="7"\| Sources
colspan="7" style="text-align:left; max-width:790px;"\| {{hidden\|ta1=left\|title=Footnotes:\|content={{ubl \| ¹ Basque Country Gather results are compared to Amaiur totals in the 2011 election.}}}}