Basque Socialist Party

{{Short description|Defunct political party from the Spanish Basque Country}}

{{Infobox political party

| name = Basque Socialist Party

| native_name = {{lang|eu|Euskal Sozialista Biltzarrea}} - {{lang|es|Partido Socialista Vasco}}

| logo =

| secretary_general =

| president =

| leader = Iñaki Aldekoa
Txillardegi[http://www.elcorreo.com/vizcaya/v/20120115/politica/fallece-linguista-politico-abertzale-20120115.html Ribera, Anje (15 January 2012). «Fallece el lingüista y político abertzale Txillardegi, fundador de ETA y HB». El Correo. ]

| wing1_title =

| wing1 =

| foundation = {{start date|1975}}

| dissolution = {{end date|1980}}

| merger = Basque Socialist Movement
Aintzina collective

| merged = {{lang|eu|Herri Batasuna}}

| headquarters =

| ideology = 1975-1977:
Basque nationalism
Social democracy
1977-1980:
Marxism
Abertzale Left
Basque independence[http://www.euskomedia.org/aunamendi/143759/125413 Carlos Caballero Basáñez (2006). «Euskal Sozialista Biltzarrea-Partido Socialista Vasco. Antecedentes.». Enciclopedia Vasca Auñamendi]

| position = Left

| national = Herri Batasuna (1978-1980)

| international =

| newspaper = Aintzina

| youth_wing =

| colorcode = {{party color|Basque Socialist Party}}

| country =

| state = Basque Country

}}

Basque Socialist Party or Basque Socialist Assembly ({{langx|es|Partido Socialista Vasco}} and {{langx|eu|Euskal Sozialista Biltzarrea}}; ESB–PSV) was a socialist Basque political party, with presence in the Southern Basque Country. The party was illegal until 1978.