Category:Spanish Socialist Workers' Party
{{Commonscat|Partido Socialista Obrero Español}}
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Category:1879 establishments in Spain
Category:Federalist parties in Spain
Category:Formerly banned political parties in Spain
Category:Formerly banned socialist parties
Category:Full member parties of the Socialist International
Category:Members of the Labour and Socialist International
Category:Party of European Socialists member parties
Category:Political parties established in 1879
Category:Political parties of the Spanish Civil War
Category:Pro-European political parties in Spain
Category:Second International parties
Category:Social democratic parties in Spain
Category:Wikipedia categories named after political parties in Spain