2004 European Parliament election in Spain

{{short description|none}}

{{EngvarB|date=October 2017}}

{{Use dmy dates|date=October 2017}}

{{Infobox election

| election_name = 2004 European Parliament election in Spain

| country = Spain

| type = parliamentary

| ongoing = no

| previous_election = 1999 European Parliament election in Spain

| previous_year = 1999

| next_election = 2009 European Parliament election in Spain

| next_year = 2009

| outgoing_members = List of members of the European Parliament for Spain, 1999–2004

| elected_members = List of members of the European Parliament for Spain, 2004–09

| seats_for_election = All 54{{efn|name="50to54"|Note that while the Treaty of Nice initially allocated 50 seats to Spain, it provided for a total European Parliament size of 732 which—as a result of Bulgaria and Romania not acceessing the European Union until 2007—allowed for Spain to be awarded four additional seats, which it maintained for the entire 2004–2009 term.}} Spanish seats in the European Parliament

| majority_seats =

| opinion_polls = #Opinion polls

| registered = 34,706,044 File:Green Arrow Up Darker.svg2.6%

| turnout = 15,666,491 (45.1%)
File:Red Arrow Down.svg17.9 pp

| election_date = 13 June 2004

| image1 = 170x170px

| leader1 = Josep Borrell

| party1 = Spanish Socialist Workers' Party

| alliance1 = PES

| leader_since1 = 2 May 2004

| leaders_seat1 = Spain

| last_election1 = 24 seats, 35.3%

| seats1 = 25

| seat_change1 = File:Green Arrow Up Darker.svg1

| popular_vote1 = 6,741,112

| percentage1 = 43.5%

| swing1 = File:Green Arrow Up Darker.svg8.2 pp

| image2 = 170x170px

| leader2 = Jaime Mayor Oreja

| party2 = People's Party (Spain)

| alliance2 = European People's Party–European Democrats

| leader_since2 = 22 April 2004

| leaders_seat2 = Spain

| last_election2 = 27 seats, 39.7%

| seats2 = 24

| seat_change2 = File:Red Arrow Down.svg3

| popular_vote2 = 6,393,192

| percentage2 = 41.2%

| swing2 = File:Green Arrow Up Darker.svg1.5 pp

| image3 = 170x170px

| leader3 = Ignasi Guardans

| party3 = Galeusca–Peoples of Europe

| alliance3 = ELDR (ALDE)
EPP

| leader_since3 = 18 January 2004

| leaders_seat3 = Spain

| last_election3 = 4 seats, 8.0%{{efn|name="Galeusca"|Results for CiU (4.43%, 3 seats), CN–EP in the Basque Country and Navarre (1.94%, 0 seats), and BNG (1.65%, 1 seat) in the 1999 election.}}

| seats3 = 2

| seat_change3 = File:Red Arrow Down.svg2

| popular_vote3 = 798,816

| percentage3 = 5.1%

| swing3 = File:Red Arrow Down.svg2.9 pp

| image4 = 170x170px

| leader4 = Willy Meyer

| party4 = IUICV–EUiA

| alliance4 = GUE/NGL
Greens/EFA

| leader_since4 = 8 May 2004

| leaders_seat4 = Spain

| last_election4 = 4 seats, 6.5%{{efn|name="IU+ICV"|Results for IUEUiA (5.77%, 4 seats) and LV–IP in Catalonia (0.74%, 0 seats) in the 1999 election.}}

| seats4 = 2

| seat_change4 = File:Red Arrow Down.svg2

| popular_vote4 = 643,136

| percentage4 = 4.1%

| swing4 = File:Red Arrow Down.svg2.4 pp

| image5 = 170x170px

| leader5 = Bernat Joan

| party5 = Europe of the Peoples (2004)

| alliance5 = Greens–European Free Alliance

| leader_since5 = 17 April 1999

| leaders_seat5 = Spain

| last_election5 = 2 seats, 1.1%{{efn|name="EdP"|Results for CN–EP, not including the Balearic Islands, the Basque Country and Navarre (0.87%, 2 seats), LV–IP in Aragon (0.21%, 0 seats) and Andecha Astur (0.03%, 0 seats) in the 1999 election.}}

| seats5 = 1

| seat_change5 = File:Red Arrow Down.svg1

| popular_vote5 = 380,709

| percentage5 = 2.5%

| swing5 = File:Green Arrow Up Darker.svg1.4 pp

| image6 = 170x170px

| leader6 = Alejandro Rojas-Marcos

| party6 = European Coalition (2004)

| alliance6 = ELDR (ALDE)
Greens/EFA

| leader_since6 = 2004

| leaders_seat6 = Spain

| last_election6 = 2 seats, 3.4%{{efn|name="CE"|Results for CE (3.20%, 2 seats), CN–EP in the Balearic Islands (0.10%, 0 seats), EU (0.07%, 0 seats) and PAS (0.07%, 0 seats) in the 1999 election.}}

| seats6 = 0

| seat_change6 = File:Red Arrow Down.svg2

| popular_vote6 = 197,231

| percentage6 = 1.3%

| swing6 = File:Red Arrow Down.svg2.1 pp

| map = {{Switcher

| x315px

| Vote winner strength by province

| x315px

| Vote winner strength by autonomous community

}}

}}

The 2004 European Parliament election in Spain was held on Sunday, 13 June 2004, as part of the EU-wide election to elect the 6th European Parliament. All 54 seats allocated to Spain as per the Treaty of Nice were up for election.{{efn|name="50to54"}}

The election saw a close race between the centre-left Spanish Socialist Workers' Party (PSOE), which had accessed power earlier in April in the wake of the 11M train bombings leading up to the 14 March general election, and the centre-right People's Party (PP), still reeling from its election defeat. It marked the only time the PSOE emerged as the largest party in a European Parliament election in Spain between 1989 and 2019. It also saw a considerable drop in turnout down to 45.1%, the lowest up until that point—a figure that would be outmatched by the turnout in the two subsequent European Parliament elections, 2009 (44.9%) and 2014 (43.8%).

Electoral system

54 members of the European Parliament were allocated to Spain as per the Treaty of Nice.{{efn|name="50to54"}} Voting was on the basis of universal suffrage, which comprised all nationals and resident non-national European citizens over 18 years of age and in full enjoyment of their political rights.{{cite act |title=Ley Orgánica 5/1985, de 19 de junio, del Régimen Electoral General |language=es |date=1985-06-20 |reporter=BOE |volume=147 |institution=Jefatura del Estado [Head of State] |jurisdiction=Spain |id=[https://www.boe.es/eli/es/lo/1985/06/19/5/con BOE-A-1985-11672] |url=https://www.boe.es/buscar/act.php?id=BOE-A-1985-11672&tn=1&p=19951124 |access-date=6 March 2017 }}{{cite act |title=Treaty of Nice amending the Treaty on European Union, the Treaties establishing the European Communities and certain related acts |title-link=Treaty of Nice |reporter=OJEU C |volume=80 |date=10 March 2001 |id={{CELEX|12001C}} }}

All seats were elected using the D'Hondt method and a closed list proportional representation, with no electoral threshold being applied to be entitled to enter seat distribution. Seats were allocated to a single multi-member constituency comprising the entire national territory. The use of the electoral method resulted 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}}

Outgoing delegation

{{Main|List of members of the European Parliament for Spain, 1999–2004}}

class="wikitable" style="text-align:left;"

|+ Outgoing delegation in May 2004{{cite web |url=https://www.historiaelectoral.com/europaesp.html |title=Parlamento Europeo: Distribución de los Eurodiputados españoles en grupos parlamentarios |language=es |website=Historia Electoral.com |access-date=21 October 2021}}

rowspan="2" colspan="2"| Groups

! rowspan="2" colspan="2"| Parties

! colspan="2"| MEPs

Seats

! Total

width="1" rowspan="3" bgcolor="{{party color|European People's Party}}"|

| rowspan="3"| European People's Party–European Democrats

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

| PP

| 26

| rowspan="3"| 28

style="color:inherit;background:{{party color|Navarrese People's Union}}"|

| UPN

| 1

style="color:inherit;background:{{party color|Democratic Union of Catalonia}}"|

| UDC

| 1

rowspan="2" style="color:inherit;background:{{party color|Party of European Socialists}}"|

| rowspan="2"| Party of European Socialists

| style="color:inherit;background:{{party color|Spanish Socialist Workers' Party}}"|

| PSOE

| 23

| rowspan="2"| 24

style="color:inherit;background:{{party color|Confederation of the Greens}}"|

| LV

| 1

style="color:inherit;background:{{party color|European United Left–Nordic Green Left}}"|

| European United Left–Nordic Green Left

| style="color:inherit;background:{{party color|United Left (Spain)}}"|

| IU

| 4

| 4

rowspan="4" style="color:inherit;background:{{party color|Greens–European Free Alliance}}"|

| rowspan="4"| Greens–European Free Alliance

| style="color:inherit;background:{{party color|Galician Nationalist Bloc}}"|

| BNG

| 1

| rowspan="4"| 4

style="color:inherit;background:{{party color|Republican Left of Catalonia}}"|

| ERC

| 1

style="color:inherit;background:{{party color|Aragonese Party}}"|

| PAR

| 1

style="color:inherit;background:{{party color|Valencian Nationalist Bloc}}"|

| BNV

| 1

rowspan="3" style="color:inherit;background:{{party color|European Liberal Democrat and Reform Party Group}}"|

| rowspan="3"| European Liberal Democrat and Reform Party

| style="color:inherit;background:{{party color|Democratic Convergence of Catalonia}}"|

| CDC

| 1

| rowspan="3"| 3

style="color:inherit;background:{{party color|Basque Nationalist Party}}"|

| EAJ/PNV

| 1

style="color:inherit;background:{{party color|Valencian Union}}"|

| UV

| 1

style="color:inherit;background:{{party color|Non-Inscrits}}"|

| Non-Inscrits

| style="color:inherit;background:{{party color|Independent politician}}"|

| INDEP

| 1{{efn|Koldo Gorostiaga, former EH MEP.}}

| 1

Parties and candidates

The electoral law allowed 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 were required to inform the relevant Electoral Commission within ten days of the election call. In order to be entitled to run, parties, federations, coalitions and groupings of electors needed to secure the signature of at least 15,000 registered electors; this requirement could be lifted and replaced through the signature of at least 50 elected officials—deputies, senators, MEPs or members from the legislative assemblies of autonomous communities or from local city councils. Electors and elected officials were disallowed from signing for more than one list of candidates.

Below is a list of the main parties and electoral alliances which contested the election:

class="wikitable" style="line-height:1.35em; text-align:left;"
colspan="2" rowspan="2"| Candidacy

! rowspan="2"| Parties and
alliances

! colspan="2" rowspan="2"| Leading candidate

! rowspan="2"| Ideology

! colspan="2"| Previous result

! rowspan="2"| {{abbr|Ref.|References}}

Vote %

! Seats

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

| align="center"| PP

| {{Collapsible list

| title = List

| bullets = on

| People's Party (PP)

| Navarrese People's Union (UPN)

}}

| 50px

| Jaime Mayor Oreja

| Conservatism
Christian democracy

| align="center"| 39.74%

| {{big|27}}

| {{cite news |last=Marcos |first=Pilar |date=23 April 2004 |title=El PP designa a Mayor para que encabece su lista en las elecciones al Parlamento Europeo |url=https://elpais.com/diario/2004/04/23/espana/1082671218_850215.html |language=es |newspaper=El País |location=Madrid |access-date=21 July 2017}}

style="color:inherit;background:{{party color|Spanish Socialist Workers' Party}}"|

| align="center"| PSOE

| {{Collapsible list

| title = List

| bullets = on

| Spanish Socialist Workers' Party (PSOE)

| Socialists' Party of Catalonia (PSC)

| The Greens (LV)

}}

| 50px

| Josep Borrell

| Social democracy

| align="center"| 35.33%

| {{big|24}}

| {{cite news |date=21 April 2004 |title=Borrell y Díez encabezarán la lista del PSOE para las elecciones europeas |url=https://elpais.com/diario/2004/04/21/espana/1082498415_850215.html |language=es |newspaper=El País |location=Madrid |access-date=21 July 2017}}

style="color:inherit;background:{{party color|Galeusca–Peoples of Europe}}"|

| align="center"| Galeusca

| {{Collapsible list

| title = List

| bullets = on

| Convergence and Union (CiU)

| Basque Nationalist Party (EAJ/PNV)

| Galician Nationalist Bloc (BNG)

| Valencian Nationalist Bloc (BNV)

| PSM–Nationalist Agreement (PSM–EN)

}}

| 50px

| Ignasi Guardans

| Peripheral nationalism

| align="center"|
8.02%
{{efn|name="Galeusca"}}

| {{big|4}}

| {{cite news |last=Garriga |first=Josep |date=15 January 2004 |title=Ignasi Guardans sustituirá a Gasòliba como 'número uno' de CiU en las europeas |url=https://elpais.com/diario/2004/01/15/catalunya/1074132447_850215.html |language=es |newspaper=El País |location=Barcelona |access-date=21 July 2017}}
{{cite news |last=Aymi |first=Oriol |date=25 April 2004 |title=CiU y ERC aprueban sus listas para las próximas elecciones europeas |url=https://elpais.com/diario/2004/04/25/catalunya/1082855249_850215.html |language=es |newspaper=El País |location=Tarragona |access-date=21 July 2017}}

style="color:inherit;background:{{party color|United Left (Spain)}}"|

| align="center"| IUICV–EUiA

| {{Collapsible list

| title = List

| bullets = on

| United Left (IU)

| Initiative for Catalonia Greens–United and Alternative Left (ICV–EUiA)

| Republican Left (IR)

| Independent Socialists of Extremadura (SIEx)

| Bloc for Asturias (BA)

| The Greens of the Balearic Islands (EVIB)

}}

| 50px

| Willy Meyer

| Socialism
Communism

| align="center"|
6.51%
{{efn|name="IU+ICV"}}

| {{big|4}}

| {{cite news |last=Elordi Cué |first=Carlos |date=22 April 2004 |title=La dirección de IU sanciona la lista europea con el apoyo del 68% |url=https://elpais.com/diario/2004/04/22/espana/1082584831_850215.html |language=es |newspaper=El País |location=Madrid |access-date=21 July 2017}}
{{cite news |author=Agencias |date=8 May 2004 |title=Willy Meyer será el candidato de IU a las elecciones europeas |url=http://cadenaser.com/ser/2004/05/08/espana/1083973818_850215.html |language=es |publisher=Cadena SER |location=Madrid |access-date=21 July 2017}}

style="color:inherit;background:{{party color|European Coalition (2004)}}"|

| align="center"| CE

| {{Collapsible list

| title = List

| bullets = on

| Andalusian Party (PA)

| Canarian Coalition (CC)

| Valencian Union (UV)

| Aragonese Party (PAR)

| Majorcan Union (UM)

| Convergence of Democrats of Navarre (CDN)

| United Extremadura (EU)

| Asturianist Party (PAS)

}}

| 50px

| Alejandro Rojas-Marcos

| Regionalism

| align="center"|
3.44%
{{efn|name="CE"}}

| {{big|2}}

|

style="color:inherit;background:{{party color|Europe of the Peoples (2004)}}"|

| align="center"| EdP

| {{Collapsible list

| title = List

| bullets = on

| Republican Left of Catalonia (ERC)

| Basque Solidarity (EA)

| Aragonese Union (CHA)

| Socialist Party of Andalusia (PSA)

| Left Assembly–Initiative for Andalusia (A–IZ)

| Andecha Astur (AA)

| Cantabrian Nationalist Council (CNC)

| Citizen Initiative of La Rioja (ICLR)

}}

| 50px

| Bernat Joan

| Peripheral nationalism

| align="center"|
1.11%
{{efn|name="EdP"}}

| {{big|2}}

|

The abertzale left tried to run under the umbrella of the Herritarren Zerrenda list (Basque for "Citizens' List").{{cite news |last=Gastaminza |first=Genoveva |date=15 May 2004 |title=Una candidatura 'abertzale' de izquierdas y por la autodeterminación |url=https://elpais.com/diario/2004/05/15/espana/1084572001_850215.html |language=es |newspaper=El País |location=San Sebastián |access-date=17 January 2019}}{{cite news |date=18 May 2004 |title=El BOE publica las 32 candidaturas para las europeas, incluida la de Herritarren Zerrenda |url=https://elpais.com/elpais/2004/05/18/actualidad/1084868228_850215.html |language=es |newspaper=El País |location=Madrid |access-date=17 January 2019}} However, the Spanish Supreme Court annulled HZ lists and banned them from running on 22 May 2004, as it considered that the candidacy's promoters and half of its candidates had links with the outlawed Batasuna and with the ETA environment.{{cite news |last=Martínez Lázaro |first=Julio |date=22 May 2004 |title=El Tribunal Supremo anula la candidatura de HZ a las elecciones europeas del 13-J |url=https://elpais.com/diario/2004/05/22/espana/1085176809_850215.html |language=es |newspaper=El País |location=Madrid |access-date=17 January 2019}}

Opinion polls

The tables below list opinion polling results in reverse chronological order, showing the most recent first and using the dates when the survey fieldwork was done, as opposed to the date of publication. Where the fieldwork dates are unknown, the date of publication is given instead. The highest percentage figure in each polling survey is displayed with its background shaded in the leading party's colour. If a tie ensues, this is applied to the figures with the highest percentages. The "Lead" column on the right shows the percentage-point difference between the parties with the highest percentages in a poll.

=Voting intention estimates=

The table below lists weighted voting intention estimates. Refusals are generally excluded from the party vote percentages, while question wording and the treatment of "don't know" responses and those not intending to vote may vary between polling organisations. When available, seat projections determined by the polling organisations are displayed below (or in place of) the percentages in a smaller font.

;{{smaller|Color key:}}

{{smaller|{{legend2|#EAFFEA|Exit poll|border=1px solid #AAAAAA}}}}

class="wikitable collapsible collapsed" style="text-align:center; font-size:95%; line-height:16px;"
style="height:42px;"

! style="width:250px;" rowspan="2"| Polling firm/Commissioner

! style="width:125px;" rowspan="2"| Fieldwork date

! style="width:50px;" rowspan="2"| Sample size

! style="width:45px;" rowspan="2"| Turnout

! style="width:35px;"| File:People's Party (Spain) Logo (2000-2007).svg

! style="width:35px;"| File:Logotipo del PSOE.svg

! style="width:35px;"| GEC

! style="width:35px;"| File:Logo-izquierda-unida2.png

! style="width:35px;"| CE

! style="width:35px;"| EP

! style="width:30px;" rowspan="2"| Lead

style="color:inherit;background:{{party color|People's Party (Spain)}};"|

! style="color:inherit;background:{{party color|Spanish Socialist Workers' Party}};"|

! style="color:inherit;background:{{party color|Galeusca–Peoples of Europe}};"|

! style="color:inherit;background:{{party color|United Left (Spain)}};"|

! style="color:inherit;background:{{party color|European Coalition (2004)}};"|

! style="color:inherit;background:{{party color|Europe of the Peoples (2004)}};"|

colspan="11" style="background:#A0A0A0"|
style="background:#EFEFEF;"

| 2004 EP election

| 13 Jun 2004

| {{N/A}}

| 45.1

| 41.2
{{font|size=75%|font=Verdana|text=24}}

| {{Party shading/PSOE}}| 43.5
{{font|size=75%|font=Verdana|text=25}}

| 5.1
{{font|size=75%|font=Verdana|text=2}}

| 4.1
{{font|size=75%|font=Verdana|text=2}}

| 1.3
{{font|size=75%|font=Verdana|text=0}}

| 2.5
{{font|size=75%|font=Verdana|text=1}}

| style="background:{{party color|Spanish Socialist Workers' Party}}; color:white;"| 2.3

colspan="11" style="background:#A0A0A0"|
style="background:#EAFFEA;"

| Sigma Dos/Antena 3{{cite web |title=Lo que pronosticaron los sondeos a pie de urna |url=https://www.libertaddigital.com/nacional/lo-que-pronosticaron-los-sondeos-a-pie-de-urna-1276225137/ |language=es |work=Libertad Digital |access-date=13 June 2004}}{{cite web |title=Sondejos |url=http://governacio.gencat.cat/ca/pgov_ambits_d_actuacio/pgov_eleccions/pgov_totes_les_convocatories/pgov_parlament_europeu/pgov_any_2004_pe/sondejos/ |language=ca |work=Generalitat de Catalunya |access-date=16 June 2018}}

| 13 Jun 2004

|?

|?

| 39.5–
41.5
{{font|size=75%|font=Verdana|text=22/24}}

| {{Party shading/PSOE}}| 42.0–
44.0

{{font|size=75%|font=Verdana|text=23/25}}

| 6.0
{{font|size=75%|font=Verdana|text=3}}

| 5.0
{{font|size=75%|font=Verdana|text=2/3}}

| 1.6
{{font|size=75%|font=Verdana|text=0/1}}

| 2.4
{{font|size=75%|font=Verdana|text=1}}

| style="background:{{party color|Spanish Socialist Workers' Party}}; color:white;"| 2.5

style="background:#EAFFEA;"

| Ipsos–Eco/RTVE

| 13 Jun 2004

|?

|?

| 39.9
{{font|size=75%|font=Verdana|text=21/24}}

| {{Party shading/PSOE}}| 43.4
{{font|size=75%|font=Verdana|text=23/26}}

| 5.5
{{font|size=75%|font=Verdana|text=2/3}}

| 4.4
{{font|size=75%|font=Verdana|text=1/2}}

| 1.7
{{font|size=75%|font=Verdana|text=0/1}}

| 2.6
{{font|size=75%|font=Verdana|text=1/2}}

| style="background:{{party color|Spanish Socialist Workers' Party}}; color:white;"| 3.5

Celeste-Tel/La Razón{{cite web |title=Los sondeos dan la victoria a Borrell el 13-J aunque Mayor Oreja empieza a recortar diferencias |url=https://www.libertaddigital.com/nacional/los-sondeos-dan-la-victoria-a-borrell-el-13-j-aunque-mayor-oreja-empieza-a-recortar-diferencias-1276224675/ |language=es |work=Libertad Digital |access-date=6 June 2004}}

| 6 Jun 2004

| 1,202

|?

| 37.2
{{font|size=75%|font=Verdana|text=21/22}}

| {{Party shading/PSOE}}| 46.1
{{font|size=75%|font=Verdana|text=26/27}}

| 5.2
{{font|size=75%|font=Verdana|text=2/3}}

| 4.6
{{font|size=75%|font=Verdana|text=2}}

| 1.3
{{font|size=75%|font=Verdana|text=0}}

| 3.0
{{font|size=75%|font=Verdana|text=1}}

| style="background:{{party color|Spanish Socialist Workers' Party}}; color:white;"| 8.9

Noxa/La Vanguardia{{cite web |title=El PSOE amplía la ventaja del 14-M |url=http://hemeroteca.lavanguardia.com/preview/2004/06/06/pagina-18/33656872/pdf.html |language=es |work=La Vanguardia |date=6 June 2004}}

| 31 May–3 Jun 2004

| 1,200

|?

| 37.4
{{font|size=75%|font=Verdana|text=22}}

| {{Party shading/PSOE}}| 46.1
{{font|size=75%|font=Verdana|text=27}}

| 4.9
{{font|size=75%|font=Verdana|text=2}}

| 4.8
{{font|size=75%|font=Verdana|text=2}}

| 1.5
{{font|size=75%|font=Verdana|text=0}}

| 2.4
{{font|size=75%|font=Verdana|text=1}}

| style="background:{{party color|Spanish Socialist Workers' Party}}; color:white;"| 8.7

Sigma Dos/El Mundo{{cite web |title=El PSOE supera al PP en 4,7 puntos a una semana de las elecciones europeas |url=http://www.elmundo.es/elmundo/2004/06/06/espana/1086505770.html |language=es |work=El Mundo |date=6 June 2004}}

| 1–2 Jun 2004

| 1,000

|?

| 37.9
{{font|size=75%|font=Verdana|text=21/23}}

| {{Party shading/PSOE}}| 42.6
{{font|size=75%|font=Verdana|text=24/26}}

| 5.2
{{font|size=75%|font=Verdana|text=2/3}}

| 5.2
{{font|size=75%|font=Verdana|text=2/3}}

| 1.7
{{font|size=75%|font=Verdana|text=0/1}}

| 3.1
{{font|size=75%|font=Verdana|text=1}}

| style="background:{{party color|Spanish Socialist Workers' Party}}; color:white;"| 4.7

TNS Demoscopia/ABC{{cite web |title=El PSOE ganará las elecciones europeas y el PP recuperará parte de los votos perdidos el 14-M |url=http://hemeroteca.abc.es/nav/Navigate.exe/hemeroteca/madrid/abc/2004/06/06/014.html |language=es |work=ABC |date=6 June 2004}}

| 31 May–2 Jun 2004

| 2,005

| 55–60

| 38.4
{{font|size=75%|font=Verdana|text=22}}

| {{Party shading/PSOE}}| 46.7
{{font|size=75%|font=Verdana|text=27}}

| 4.6
{{font|size=75%|font=Verdana|text=2}}

| 3.7
{{font|size=75%|font=Verdana|text=2}}

| 1.1
{{font|size=75%|font=Verdana|text=0}}

| 2.2
{{font|size=75%|font=Verdana|text=1}}

| style="background:{{party color|Spanish Socialist Workers' Party}}; color:white;"| 8.3

CIS{{cite web |title=Preelectoral elecciones al Parlamento Europeo, 2004 (Estudio nº 2564. Mayo 2004) |url=https://www.cis.es/documents/d/cis/es2564marpdf |language=es |work=CIS |date=3 June 2004}}{{cite web |title=El PSOE revalidará y aumentará en las europeas su triunfo del 14-M, según el CIS |url=http://hemeroteca.lavanguardia.com/preview/2004/05/12/pagina-17/33655684/pdf.html |language=es |work=La Vanguardia |date=4 June 2004}}

| 19–26 May 2004

| 4,781

| 76.7

| 36.7
{{font|size=75%|font=Verdana|text=22}}

| {{Party shading/PSOE}}| 46.3
{{font|size=75%|font=Verdana|text=27}}

| 5.0
{{font|size=75%|font=Verdana|text=2}}

| 4.4
{{font|size=75%|font=Verdana|text=2}}

| 1.5
{{font|size=75%|font=Verdana|text=0}}

| 3.1
{{font|size=75%|font=Verdana|text=1}}

| style="background:{{party color|Spanish Socialist Workers' Party}}; color:white;"| 9.6

Opina/El País{{cite web |title=El PSOE, claro favorito para el 13-J |url=https://elpais.com/diario/2004/05/30/espana/1085868003_850215.html |language=es |work=El País |date=30 May 2004}}{{cite web |title=Informe. Encuesta España. Mayo 2004 |url=http://www.opina.es:80/usuarios/track/repositorio/encuestas/90025e.pdf |archive-url=https://web.archive.org/web/20050507012719/http://www.opina.es/usuarios/track/repositorio/encuestas/90025e.pdf |url-status=dead |archive-date=7 May 2005 |language=es |work=Instituto Opina |date=30 May 2004 |access-date=24 February 2021 }}

| 24 May 2004

| 1,000

|?

| 37.0

| {{Party shading/PSOE}}| 43.0

| 6.0

| 5.0

| 1.5

| 2.5

| style="background:{{party color|Spanish Socialist Workers' Party}}; color:white;"| 6.0

Opina/Cadena SER{{cite web |title=El PSOE arranca la campaña a las europeas con 8 puntos de ventaja sobre el PP |url=http://cadenaser.com/ser/2004/05/27/espana/1085615412_850215.html |language=es |work=Cadena SER |date=27 May 2004}}{{cite web |title=Elecciones Europeas 13 de junio de 2004 |url=http://www.cadenaser.com:80/static/pulsometro/anteriores/encuesta_040527.htm |archive-url=https://web.archive.org/web/20040605164524/http://www.cadenaser.com/static/pulsometro/anteriores/encuesta_040527.htm |url-status=dead |archive-date=5 June 2004 |language=es |work=Cadena SER |date=27 May 2004 |access-date=24 February 2021 }}

| 13 May 2004

| 1,000

|?

| 37.0

| {{Party shading/PSOE}}| 45.0

| 6.0

| 5.0

| 1.5

| 2.5

| style="background:{{party color|Spanish Socialist Workers' Party}}; color:white;"| 8.0

Sigma Dos/El Mundo{{cite web |title=Un 67% de los españoles respalda la retirada de las tropas de Irak |url=http://www.elmundo.es/elmundo/2004/04/26/espana/1082948553.html |language=es |work=El Mundo |date=26 April 2004}}{{cite web |title=Intención de voto. Encuesta El Mundo-Sigma Dos |url=http://estaticos.elmundo.es/documentos/2008/02/09/intencion_de_voto.pdf |language=es |work=El Mundo |date=10 February 2008}}

| 26 Apr 2004

|?

|?

| 39.2

| {{Party shading/PSOE}}| 45.1

| 2.1

| 3.6

| –

| –

| style="background:{{party color|Spanish Socialist Workers' Party}}; color:white;"| 5.9

Vox Pública/El Periódico{{cite web |title=Los socialistas, con ventaja en las elecciones europeas |url=http://www.elperiodicodearagon.com/noticias/temadia/socialistas-ventaja-elecciones-europeas_114660.html |language=es |work=El Periódico de Aragón |date=25 April 2004}}{{cite web |title=EMPRESA: VOX PUBLICA |url=http://www.elperiodicodearagon.com/noticias/temadia/empresa-vox-publica_114661.html |language=es |work=El Periódico de Aragón |date=25 April 2004}}

| 13–15 Apr 2004

| 1,501

|?

| 36.5
{{font|size=75%|font=Verdana|text=21/22}}

| {{Party shading/PSOE}}| 42.2
{{font|size=75%|font=Verdana|text=25}}

| 5.7
{{font|size=75%|font=Verdana|text=3}}

| 5.8
{{font|size=75%|font=Verdana|text=3}}

|?
{{font|size=75%|font=Verdana|text=0/1}}

| 2.3
{{font|size=75%|font=Verdana|text=1}}

| style="background:{{party color|Spanish Socialist Workers' Party}}; color:white;"| 5.7

Burson-Marsteller{{cite web |title=Un sondeo otorga la mayoría al centro-derecha en la Eurocámara |url=https://elpais.com/diario/2004/04/14/internacional/1081893617_850215.html |language=es |work=El País |date=14 April 2004}}

| 13 Apr 2004

|?

|?

| {{Party shading/PP}}| 38.6
{{font|size=75%|font=Verdana|text=23}}

| 35.5
{{font|size=75%|font=Verdana|text=22}}

| –

| –

| –

| –

| style="background:{{party color|People's Party (Spain)}}; color:white;"| 3.1

Opina/El País{{cite web |title=El PSOE ganará también las europeas |url=https://elpais.com/diario/2004/04/04/espana/1081029601_850215.html |language=es |work=El País |date=4 April 2004}}{{cite web |title=Informe. Encuesta España. Abril 2004 |url=http://www.opina.es:80/usuarios/track/repositorio/encuestas/90023e.pdf |archive-url=https://web.archive.org/web/20050507013945/http://www.opina.es/usuarios/track/repositorio/encuestas/90023e.pdf |url-status=dead |archive-date=7 May 2005 |language=es |work=Instituto Opina |date=4 April 2004 |access-date=24 February 2021 }}

| 30 Mar 2004

| 1,000

|?

| 38.8

| {{Party shading/PSOE}}| 45.9

| 4.2

| 5.3

| –

| –

| style="background:{{party color|Spanish Socialist Workers' Party}}; color:white;"| 7.1

Celeste-Tel{{cite web |title=Intención de voto 14 febrero 2001 |url=http://www.celeste-tel.com:80/europeo/PAG1_ENCUESTA.htm |archive-url=https://web.archive.org/web/20030623042941/http://www.celeste-tel.com/europeo/PAG1_ENCUESTA.htm |url-status=dead |archive-date=23 June 2003 |language=es |work=Celeste-Tel |date=14 February 2001 |access-date=24 February 2021 }}{{cite web |title=Intención de voto 14 febrero 2001. Ficha técnica |url=http://www.celeste-tel.com:80/europeo/PAG7_ENCUESTA.htm |archive-url=https://web.archive.org/web/20030622221737/http://www.celeste-tel.com/europeo/PAG7_ENCUESTA.htm |url-status=dead |archive-date=22 June 2003 |language=es |work=Celeste-Tel |date=14 February 2001 |access-date=24 February 2021 }}

| 14 Feb 2001

| 1,156

|?

| {{Party shading/PP}}| 38.4
{{font|size=75%|font=Verdana|text=27}}

| 37.9
{{font|size=75%|font=Verdana|text=27}}

| 4.5
{{font|size=75%|font=Verdana|text=3}}

| 4.1
{{font|size=75%|font=Verdana|text=2}}

| 3.3
{{font|size=75%|font=Verdana|text=2}}

| –

| style="background:{{party color|People's Party (Spain)}}; color:white;"| 0.5

colspan="11" style="background:#A0A0A0"|
style="background:#EFEFEF;"

| 1999 EP election

| 13 Jun 1999

| {{N/A}}

| 63.0

| {{Party shading/PP}}| 39.7
{{font|size=75%|font=Verdana|text=27}}

| 35.3
{{font|size=75%|font=Verdana|text=24}}

| 8.0
{{font|size=75%|font=Verdana|text=4}}

| 6.5
{{font|size=75%|font=Verdana|text=4}}

| 3.4
{{font|size=75%|font=Verdana|text=2}}

| 1.1
{{font|size=75%|font=Verdana|text=2}}

| style="background:{{party color|People's Party (Spain)}}; color:white;"| 4.4

colspan="11" style="background:#A0A0A0"|

=Voting preferences=

The table below lists raw, unweighted voting preferences.

class="wikitable collapsible collapsed" style="text-align:center; font-size:90%; line-height:14px;"
style="height:42px;"

! style="width:250px;" rowspan="2"| Polling firm/Commissioner

! style="width:125px;" rowspan="2"| Fieldwork date

! style="width:50px;" rowspan="2"| Sample size

! style="width:35px;"| File:People's Party (Spain) Logo (2000-2007).svg

! style="width:35px;"| File:Logotipo del PSOE.svg

! style="width:35px;"| GEC

! style="width:35px;"| File:Logo-izquierda-unida2.png

! style="width:35px;"| CE

! style="width:35px;"| EP

! style="width:35px;" rowspan="2"| {{Qmark}}

! style="width:35px;" rowspan="2"| {{cross}}

! style="width:30px;" rowspan="2"| Lead

style="color:inherit;background:{{party color|People's Party (Spain)}};"|

! style="color:inherit;background:{{party color|Spanish Socialist Workers' Party}};"|

! style="color:inherit;background:{{party color|Galeusca–Peoples of Europe}};"|

! style="color:inherit;background:{{party color|United Left (Spain)}};"|

! style="color:inherit;background:{{party color|European Coalition (2004)}};"|

! style="color:inherit;background:{{party color|Europe of the Peoples (2004)}};"|

colspan="12" style="background:#A0A0A0"|
style="background:#EFEFEF;"

| 2004 EP election

| 13 Jun 2004

| {{N/A}}

| 18.8

| {{Party shading/PSOE}}| 19.7

| 2.4

| 1.9

| 0.6

| 1.1

| {{N/A}}

| 54.1

| style="background:{{party color|Spanish Socialist Workers' Party}}; color:white;"| 0.9

colspan="12" style="background:#A0A0A0"|
TNS Demoscopia/ABC

| 31 May–2 Jun 2004

| 2,005

| 22.0

| {{Party shading/PSOE}}| 27.5

| 2.4

| 2.1

| 0.6

| 1.2

| 39.1

| 2.6

| style="background:{{party color|Spanish Socialist Workers' Party}}; color:white;"| 5.5

CIS

| 19–26 May 2004

| 4,781

| 20.7

| {{Party shading/PSOE}}| 39.8

| 2.6

| 2.8

| 0.5

| 1.4

| 22.8

| 8.2

| style="background:{{party color|Spanish Socialist Workers' Party}}; color:white;"| 19.1

Vox Pública/El Periódico

| 13–15 Apr 2004

| 1,501

| 22.3

| {{Party shading/PSOE}}| 28.2

| –

| –

| –

| –

| –

| –

| style="background:{{party color|Spanish Socialist Workers' Party}}; color:white;"| 5.9

colspan="12" style="background:#A0A0A0"|
style="background:#EFEFEF;"

| 1999 EP election

| 13 Jun 1999

| {{N/A}}

| {{Party shading/PP}}| 25.4

| 22.5

| 5.1

| 4.2

| 2.1

| 0.6

| {{N/A}}

| 35.7

| style="background:{{party color|People's Party (Spain)}}; color:white;"| 2.9

colspan="12" style="background:#A0A0A0"|

=Victory preferences=

The table below lists opinion polling on the victory preferences for each party in the event of a European Parliament election taking place.

class="wikitable collapsible collapsed" style="text-align:center; font-size:90%; line-height:14px;"
style="height:42px;"

! style="width:250px;" rowspan="2"| Polling firm/Commissioner

! style="width:125px;" rowspan="2"| Fieldwork date

! style="width:50px;" rowspan="2"| Sample size

! style="width:35px;"| File:People's Party (Spain) Logo (2000-2007).svg

! style="width:35px;"| File:Logotipo del PSOE.svg

! style="width:35px;"| GEC

! style="width:35px;"| File:Logo-izquierda-unida2.png

! style="width:35px;"| CE

! style="width:35px;"| EP

! style="width:35px;" rowspan="2"| Other/
None

! style="width:35px;" rowspan="2"| {{Qmark}}

! style="width:30px;" rowspan="2"| Lead

style="color:inherit;background:{{party color|People's Party (Spain)}};"|

! style="color:inherit;background:{{party color|Spanish Socialist Workers' Party}};"|

! style="color:inherit;background:{{party color|Galeusca–Peoples of Europe}};"|

! style="color:inherit;background:{{party color|United Left (Spain)}};"|

! style="color:inherit;background:{{party color|European Coalition (2004)}};"|

! style="color:inherit;background:{{party color|Europe of the Peoples (2004)}};"|

Noxa/La Vanguardia

| 31 May–3 Jun 2004

| 1,200

| 31.0

| {{Party shading/PSOE}}| 50.0

| 2.0

| 3.0

| –

| 2.0

| 5.0

| 7.0

| style="background:{{party color|Spanish Socialist Workers' Party}}; color:white;"| 19.0

CIS

| 19–26 May 2004

| 4,781

| 24.4

| {{Party shading/PSOE}}| 49.1

| 2.0

| 2.7

| 0.1

| 1.1

| 5.0

| 15.5

| style="background:{{party color|Spanish Socialist Workers' Party}}; color:white;"| 24.7

Opina/El País

| 24 May 2004

| 1,000

| 27.8

| {{Party shading/PSOE}}| 47.3

| –

| –

| –

| –

| 2.7

| 22.2

| style="background:{{party color|Spanish Socialist Workers' Party}}; color:white;"| 19.5

Opina/Cadena SER

| 13 May 2004

| 1,000

| 28.5

| {{Party shading/PSOE}}| 47.8

| –

| –

| –

| –

| 3.2

| 20.5

| style="background:{{party color|Spanish Socialist Workers' Party}}; color:white;"| 19.3

=Victory likelihood=

The table below lists opinion polling on the perceived likelihood of victory for each party in the event of a European Parliament election taking place.

class="wikitable collapsible collapsed" style="text-align:center; font-size:90%; line-height:14px;"
style="height:42px;"

! style="width:250px;" rowspan="2"| Polling firm/Commissioner

! style="width:125px;" rowspan="2"| Fieldwork date

! style="width:50px;" rowspan="2"| Sample size

! style="width:35px;"| File:People's Party (Spain) Logo (2000-2007).svg

! style="width:35px;"| File:Logotipo del PSOE.svg

! style="width:35px;" rowspan="2"| Other/
None

! style="width:35px;" rowspan="2"| {{Qmark}}

! style="width:30px;" rowspan="2"| Lead

style="color:inherit;background:{{party color|People's Party (Spain)}};"|

! style="color:inherit;background:{{party color|Spanish Socialist Workers' Party}};"|

Noxa/La Vanguardia

| 31 May–3 Jun 2004

| 1,200

| 22.0

| {{Party shading/PSOE}}| 59.0

| 1.0

| 18.0

| style="background:{{party color|Spanish Socialist Workers' Party}}; color:white;"| 37.0

CIS

| 19–26 May 2004

| 4,781

| 12.3

| {{Party shading/PSOE}}| 57.2

| 0.8

| 29.7

| style="background:{{party color|Spanish Socialist Workers' Party}}; color:white;"| 44.9

Opina/El País

| 24 May 2004

| 1,000

| 16.0

| {{Party shading/PSOE}}| 48.3

| 0.3

| 35.4

| style="background:{{party color|Spanish Socialist Workers' Party}}; color:white;"| 32.3

Opina/Cadena SER

| 13 May 2004

| 1,000

| 18.0

| {{Party shading/PSOE}}| 49.2

| 1.9

| 30.9

| style="background:{{party color|Spanish Socialist Workers' Party}}; color:white;"| 31.2

Results

=Overall=

{{For|results by autonomous community/constituency|Results breakdown of the 2004 European Parliament election in Spain}}

class="wikitable" style="text-align:right;"

|+ Summary of the 13 June 2004 European Parliament election results in Spain

colspan="7"| File:SpainEuropeanParliamentDiagram2004.svg
style="text-align:left;" rowspan="2" colspan="2" width="525"| Parties and alliances

! colspan="3"| Popular vote

! colspan="2"| Seats

width="75"| Votes

! width="45"| %

! width="45"| ±pp

! width="35"| Total

! width="35"| +/−

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

| align="left"| Spanish Socialist Workers' Party (PSOE)

| 6,741,112

43.46style="color:green;"| +8.13

| 25

style="color:green;"| +1
style="color:inherit;background:{{party color|People's Party (Spain)}}"|

| align="left"| People's Party (PP)

| 6,393,192

41.21style="color:green;"| +1.47

| 24

style="color:red;"| –3
style="color:inherit;background:{{party color|Galeusca–Peoples of Europe}}"|

| align="left"| Galeusca–Peoples of Europe (Galeusca)1

| 798,816

5.15style="color:red;"| –2.87

| 2

style="color:red;"| –2
style="color:inherit;background:{{party color|United Left (Spain)}}"|

| align="left"| United LeftInitiative for Catalonia Greens–EUiA (IU–ICV–EUiA)2

| 643,136

4.15style="color:red;"| –2.36

| 2

style="color:red;"| –2
style="color:inherit;background:{{party color|Europe of the Peoples (2004)}}"|

| align="left"| Europe of the Peoples (EdP)3

| 380,709

2.45style="color:green;"| +1.34

| 1

style="color:red;"| –1
style="color:inherit;background:{{party color|European Coalition (2004)}}"|

| align="left"| European Coalition (CE)4

| 197,231

1.27style="color:red;"| –2.17

| 0

style="color:red;"| –2
style="color:inherit;background:{{party color|The Greens–European Green Group}}"|

| align="left"| The Greens–European Green Group (LV–GVE)5

| 68,536

0.44style="color:red;"| –0.22

| 0

±0
style="color:inherit;background:{{party color|Cannabis Party (Spain)}}"|

| align="left"| Cannabis Party for Legalisation and Normalisation (PCLyN)

| 54,460

0.35New

| 0

±0
style="color:inherit;background:{{party color|Aralar (Basque political party)}}"|

| align="left"| Aralar (Aralar)

| 19,993

0.13New

| 0

±0
style="color:inherit;background:{{party color|Socialist Action Party (Spain)}}"|

| align="left"| Socialist Action Party (PASOC)

| 13,810

0.09New

| 0

±0
style="color:inherit;background:{{party color|Democratic and Social Centre (Spain)}}"|

| align="left"| Democratic and Social Centre (CDS)

| 11,820

0.08style="color:red;"| –0.10

| 0

±0
style="color:inherit;background:{{party color|For a Fairer World}}"|

| align="left"| For a Fairer World (PUM+J)

| 9,202

0.06New

| 0

±0
style="color:inherit;background:{{party color|Popular Unity Candidacy}}"|

| align="left"| Popular Unity Candidacy (CUP)

| 8,180

0.05New

| 0

±0
style="color:inherit;background:{{party color|Internationalist Socialist Workers' Party}}"|

| align="left"| Internationalist Socialist Workers' Party (POSI)6

| 7,976

0.05style="color:green;"| +0.02

| 0

±0
style="color:inherit;background:{{party color|Family and Life Party}}"|

| align="left"| Family and Life Party (PFyV)

| 7,958

0.05New

| 0

±0
style="color:inherit;background:{{party color|New Andalusian Green Left}}"|

| align="left"| New Green Left (NIV)

| 6,876

0.04New

| 0

±0
style="color:inherit;background:{{party color|National Democracy (Spain)}}"|

| align="left"| National Democracy (DN)

| 6,314

0.04±0.00

| 0

±0
style="color:inherit;background:{{party color|La Falange (1999)}}"|

| align="left"| The Phalanx (FE)

| 5,935

0.04style="color:red;"| –0.01

| 0

±0
bgcolor="white"|

| align="left"| The Unemployed (Los Parados)

| 5,314

0.03New

| 0

±0
style="color:inherit;background:{{party color|Commoners' Land}}"|

| align="left"| Commoners' Land–Castilian Nationalist Party (TC–PNC)

| 5,267

0.03style="color:red;"| –0.03

| 0

±0
style="color:inherit;background:{{party color|Falange Española de las JONS (1976)}}"|

| align="left"| Spanish Phalanx of the CNSO (FE–JONS)

| 4,484

0.03New

| 0

±0
style="color:inherit;background:{{party color|Communist Party of the Peoples of Spain}}"|

| align="left"| Communist Party of the Peoples of SpainInternationalist Struggle (PCPE–LI)

| 4,281

0.03style="color:red;"| –0.09

| 0

±0
style="color:inherit;background:{{party color|Humanist Party (Spain)}}"|

| align="left"| Humanist Party (PH)

| 3,923

0.03style="color:red;"| –0.03

| 0

±0
style="color:inherit;background:{{party color|Spanish Democratic Party}}"|

| align="left"| Spanish Democratic Party (PADE)

| 3,454

0.02style="color:red;"| –0.06

| 0

±0
style="color:inherit;background:{{party color|Regionalist Party of the Leonese Country}}"|

| align="left"| Regionalist Party of the Leonese Country (PREPAL)

| 3,308

0.02style="color:red;"| –0.01

| 0

±0
style="color:inherit;background:{{party color|Estat Català}}"|

| align="left"| Catalan State (EC)

| 2,594

0.02New

| 0

±0
style="color:inherit;background:{{party color|Nós–Unidade Popular}}"|

| align="left"| We–People's Unity (Nós–UP)

| 2,516

0.02New

| 0

±0
style="color:inherit;background:{{party color|Falange Auténtica}}"|

| align="left"| Authentic Phalanx (FA)

| 2,008

0.01New

| 0

±0
bgcolor="white"|

| align="left"| Liberal Coalition (CL)

| 1,719

0.01New

| 0

±0
style="color:inherit;background:{{party color|Carlist Party (1970)}}"|

| align="left"| Carlist Party (PC)

| 1,600

0.01New

| 0

±0
style="color:inherit;background:{{party color|Liberal Centrist Union (Spain)}}"|

| align="left"| Liberal Centrist Union (UCL)

| 1,544

0.01New

| 0

±0
style="color:inherit;background:{{party color|Euskal Herritarrok}}"|

| align="left"| Basque Citizens (EH)

| n/a

n/astyle="color:red;"| –1.45

| 0

style="color:red;"| –1
align="left" colspan="2"| Blank ballots

| 95,014

0.61style="color:red;"| –1.08

| bgcolor="#E9E9E9" colspan="2"|

colspan="7" bgcolor="#E9E9E9"|
style="font-weight:bold;"

| align="left" colspan="2"| Total

| 15,512,282

bgcolor="#E9E9E9" colspan="2"|

| 54

style="color:red;"| –10
colspan="7" bgcolor="#E9E9E9"|
align="left" colspan="2"| Valid votes

| 15,512,282

99.02style="color:red;"| –0.19

| bgcolor="#E9E9E9" colspan="2" rowspan="5"|

align="left" colspan="2"| Invalid votes

| 154,209

0.98style="color:green;"| +0.19
style="font-weight:bold;"

| align="left" colspan="2"| Votes cast / turnout

| 15,666,491

45.14style="color:red;"| –17.91
align="left" colspan="2"| Abstentions

| 19,039,553

54.86style="color:green;"| +17.91
style="font-weight:bold;"

| align="left" colspan="2"| Registered voters

| 34,706,044

bgcolor="#E9E9E9" colspan="2"|
colspan="7" bgcolor="#E9E9E9"|
align="left" colspan="7"| Sources{{cite web |url=https://infoelectoral.interior.gob.es/opencms/es/elecciones-celebradas/resultados-electorales/ |title=Elecciones celebradas. Resultados electorales |language=es |publisher=Ministry of the Interior |access-date=15 April 2022}}{{cite web |url=https://www.historiaelectoral.com/eu2004.html |title=Elecciones Europeas 13 de junio de 2004 |language=es |website=Historia Electoral.com |access-date=21 October 2021}}
colspan="7" style="text-align:left; max-width:790px;"| {{hidden|ta1=left|title=Footnotes:|content={{ubl

| 1 Galeusca–Peoples of Europe results are compared to the combined totals of Convergence and Union, Nationalist Coalition–Europe of the Peoples in the Basque Country and Navarre and Galician Nationalist Bloc in the 1999 election.

| 2 United LeftInitiative for Catalonia Greens–EUiA results are compared to the combined totals of United LeftUnited and Alternative Left and The Greens–Left of the Peoples in Catalonia in the 1999 election.

| 3 Europe of the Peoples results are compared to the combined totals of Nationalist Coalition–Europe of the Peoples—not including results in the Balearic Islands, the Basque Country and Navarre—, The Greens–Left of the Peoples in Aragon and Andecha Astur in the 1999 election.

| 4 European Coalition (2004) results are compared to the combined totals of European Coalition (1999), Nationalist Coalition–Europe of the Peoples in the Balearic Islands, United Extremadura and Asturianist Party in the 1999 election.

| 5 The Greens–European Green Group results are compared to The Greens–Green Group totals in the 1999 election.

| 6 Internationalist Socialist Workers' Party results are compared to Coalition for the Repeal of the Maastricht Treaty totals in the 1999 election.}}}}

{{bar box

|title=Popular vote

|titlebar=#ddd

|width=550px

|barwidth=500px

|bars=

{{bar percent|PSOE|{{party color|Spanish Socialist Workers' Party}}|43.46}}

{{bar percent|PP|{{party color|People's Party (Spain)}}|41.21}}

{{bar percent|Galeusca|{{party color|Galeusca–Peoples of Europe}}|5.15}}

{{bar percent|IUICV–EUiA|{{party color|United Left (Spain)}}|4.15}}

{{bar percent|EdP|{{party color|Europe of the Peoples (2004)}}|2.45}}

{{bar percent|CE|{{party color|European Coalition (2004)}}|1.27}}

{{bar percent|Others|#777777|1.70}}

{{bar percent|Blank ballots|#DDDDDD|0.61}}

}}

{{bar box

|title=Seats

|titlebar=#ddd

|width=550px

|barwidth=500px

|bars=

{{bar percent|PSOE|{{party color|Spanish Socialist Workers' Party}}|46.30}}

{{bar percent|PP|{{party color|People's Party (Spain)}}|44.44}}

{{bar percent|Galeusca|{{party color|Galeusca–Peoples of Europe}}|3.70}}

{{bar percent|IUICV–EUiA|{{party color|United Left (Spain)}}|3.70}}

{{bar percent|EdP|{{party color|Europe of the Peoples (2004)}}|1.85}}

}}

=Maps=

File:2004 European election in Spain - Vote Strength.svg|Vote winner strength by province.

File:2004 European election in Spain - AC results.svg|Vote winner strength by autonomous community.

=Distribution by European group=

class="wikitable" style="text-align:right;"

|+ Summary of political group distribution in the 6th European Parliament (2004–2009)

style="text-align:left;" colspan="2" width="375"| Groups

! style="text-align:left;" width="350"| Parties

! width="35"| Seats

! width="35"| Total

! width="45"| %

style="background:#FFDFE3;"

| width="1" style="color:inherit;background:{{party color|Party of European Socialists}}"|

| align="left"| Party of European Socialists (PES)

| align="left"|

| 24

| 24

| 44.44

style="background:#DFEFFF;"

| style="color:inherit;background:{{party color|European People's Party}}"|

| align="left"| European People's Party–European Democrats (EPP–ED)

| align="left"|

| 23
1

| 24

| 44.44

style="background:#DFFFDF;"

| style="color:inherit;background:{{party color|Greens–European Free Alliance}}"|

| align="left"| Greens–European Free Alliance (Greens/EFA)

| align="left"|

| 1
1
1

| 3

| 5.56

style="background:#FFFBDF;"

| style="color:inherit;background:{{party color|Alliance of Liberals and Democrats for Europe Group}}"|

| align="left"| Alliance of Liberals and Democrats for Europe (ALDE)

| align="left"|

| 1
1

| 2

| 3.70

style="background:#FFE3DF;"

| style="color:inherit;background:{{party color|European United Left–Nordic Green Left}}"|

| align="left"| European United Left–Nordic Green Left (GUE/NGL)

| align="left"|

| 1

| 1

| 1.85

colspan="6"|
style="background:#E4E4E4; font-weight:bold;"

| align="left" colspan="3"| Total

| 54

| 54

| 100.00

=Elected legislators=

The following table lists the elected legislators:{{Smallcaps|Junta Electoral Central}}: {{Cite journal|issn=0212-033X |issue=158|date=1 July 2004|url=https://www.boe.es/boe/dias/2004/07/01/pdfs/A24477-24477.pdf|title=Acuerdo de 29 de junio de 2004, de la Junta Electoral Central, por el que se procede a la proclamación de Diputados electos al Parlamento Europeo en las elecciones celebradas el 13 de junio de 2004|journal=Boletín Oficial del Estado|pages=24477}}

class="wikitable sortable collapsible collapsed""
background-color:#E9E9E9"

! colspan="4"| Elected legislators

background-color:#E9E9E9"

! width="10px"| #

! width="280px"| Name

! width="80px" colspan="2"| List

1Josep Borrell Fontellesbgcolor="{{party color|Spanish Socialist Workers' Party}}"|PSOE
2Jaime María Mayor Orejawidth="1" bgcolor="{{party color|People's Party (Spain)}}"|PP
3Rosa María Díez Gonzálezbgcolor="{{party color|Spanish Socialist Workers' Party}}"|PSOE
4Luisa Fernanda Rudi Úbedawidth="1" bgcolor="{{party color|People's Party (Spain)}}"|PP
5Enrique Barón Crespobgcolor="{{party color|Spanish Socialist Workers' Party}}"|PSOE
6José Gerardo Galeote Quecedowidth="1" bgcolor="{{party color|People's Party (Spain)}}"|PP
7Raimon Obiols i Germábgcolor="{{party color|Spanish Socialist Workers' Party}}"|PSOE
8Alejo Vidal-Quadras Rocawidth="1" bgcolor="{{party color|People's Party (Spain)}}"|PP
9María Elena Valenciano Martínez-Orozcobgcolor="{{party color|Spanish Socialist Workers' Party}}"|PSOE
10Ana Mato Adroverwidth="1" bgcolor="{{party color|People's Party (Spain)}}"|PP
11Luis Yáñez-Barnuevo Garcíabgcolor="{{party color|Spanish Socialist Workers' Party}}"|PSOE
12Cristóbal Ricardo Montoro Romerowidth="1" bgcolor="{{party color|People's Party (Spain)}}"|PP
13Bárbara Dührkop Dührkopbgcolor="{{party color|Spanish Socialist Workers' Party}}"|PSOE
14José Manuel García-Margallo Marfilwidth="1" bgcolor="{{party color|People's Party (Spain)}}"|PP
15Carlos Carnero Gonzálezbgcolor="{{party color|Spanish Socialist Workers' Party}}"|PSOE
16María del Carmen Fraga Estévezwidth="1" bgcolor="{{party color|People's Party (Spain)}}"|PP
17Ignasi Guardans Cambóbgcolor="{{party color|Galeusca–Peoples of Europe}}" |Galeusca
18Manuel Medina Ortegabgcolor="{{party color|Spanish Socialist Workers' Party}}"|PSOE
19José Javier Pomes Ruizwidth="1" bgcolor="{{party color|People's Party (Spain)}}"|PP
20Inés Ayala Senderbgcolor="{{party color|Spanish Socialist Workers' Party}}"|PSOE
21Willy Meyer Pleitebgcolor="{{party color|United Left (Spain)}}" |IUICV–EUiA
22Pilar del Castillo Verawidth="1" bgcolor="{{party color|People's Party (Spain)}}"|PP
23Emilio Menéndez del Vallebgcolor="{{party color|Spanish Socialist Workers' Party}}"|PSOE
24Luis de Grandes Pascualwidth="1" bgcolor="{{party color|People's Party (Spain)}}"|PP
25Antolín Sánchez Presedobgcolor="{{party color|Spanish Socialist Workers' Party}}"|PSOE
26Luis Herrero-Tejedor Algarwidth="1" bgcolor="{{party color|People's Party (Spain)}}"|PP
27Iratxe García Pérezbgcolor="{{party color|Spanish Socialist Workers' Party}}"|PSOE
28Agustín Díaz de Mera García Consuegrawidth="1" bgcolor="{{party color|People's Party (Spain)}}"|PP
29Joan Calabuig Rullbgcolor="{{party color|Spanish Socialist Workers' Party}}"|PSOE
30Fernando Manuel Fernández Martínwidth="1" bgcolor="{{party color|People's Party (Spain)}}"|PP
31Francisca Pleguezuelos Aguilarbgcolor="{{party color|Spanish Socialist Workers' Party}}"|PSOE
32Carlos José Iturgaiz Angulowidth="1" bgcolor="{{party color|People's Party (Spain)}}"|PP
33Alejandro Cercas Alonsobgcolor="{{party color|Spanish Socialist Workers' Party}}"|PSOE
34Antonio López-Istúriz Whitewidth="1" bgcolor="{{party color|People's Party (Spain)}}"|PP
35Josu Ortuondo Larreabgcolor="{{party color|Galeusca–Peoples of Europe}}" |Galeusca
36Antonio Masip Hidalgobgcolor="{{party color|Spanish Socialist Workers' Party}}"|PSOE
37Bernat Joan i Maríbgcolor="{{party color|Europe of the Peoples (2004)}}" |EdP
38Francisco José Millán Monwidth="1" bgcolor="{{party color|People's Party (Spain)}}"|PP
39María Badía i Cutxetbgcolor="{{party color|Spanish Socialist Workers' Party}}"|PSOE
40Íñigo Méndez de Vigo Montojowidth="1" bgcolor="{{party color|People's Party (Spain)}}"|PP
41Miguel Ángel Martínez Martínezbgcolor="{{party color|Spanish Socialist Workers' Party}}"|PSOE
42David Hammerstein Mintzbgcolor="{{party color|Spanish Socialist Workers' Party}}"|PSOE
43María del Pilar Ayuso Gonzálezwidth="1" bgcolor="{{party color|People's Party (Spain)}}"|PP
44Raül Romeva Ruedabgcolor="{{party color|United Left (Spain)}}" |IUICV–EUiA
45Rosa Miguélez Ramosbgcolor="{{party color|Spanish Socialist Workers' Party}}"|PSOE
46José Ignacio Salafranca Sánchez-Neyrawidth="1" bgcolor="{{party color|People's Party (Spain)}}"|PP
47Javier Moreno Sánchezbgcolor="{{party color|Spanish Socialist Workers' Party}}"|PSOE
48Cristina Gutiérrez-Cortines Corralwidth="1" bgcolor="{{party color|People's Party (Spain)}}"|PP
49Teresa Riera Madurellbgcolor="{{party color|Spanish Socialist Workers' Party}}"|PSOE
50Salvador Garriga Polledowidth="1" bgcolor="{{party color|People's Party (Spain)}}"|PP
51María Isabel Salinas Garcíabgcolor="{{party color|Spanish Socialist Workers' Party}}"|PSOE
52Daniel Luis Varela Suanzes-Carpegnawidth="1" bgcolor="{{party color|People's Party (Spain)}}"|PP
53María Sornosa Martínezbgcolor="{{party color|Spanish Socialist Workers' Party}}"|PSOE
54María Esther Herranz Garcíawidth="1" bgcolor="{{party color|People's Party (Spain)}}"|PP

Notes

{{notelist}}

References

;Opinion poll sources

{{reflist|group="p"}}

;Other

{{reflist}}