Unified Socialist Party of Catalonia Partit Socialista Unificat de Catalunya | |
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 | |
| Founded | 23 July 1936 |
| Dissolved | 1997 |
| Merger of | Catalan Federation of the PSOE Communist Party of Catalonia Socialist Union of Catalonia Proletarian Catalan Party |
| Merged into | Initiative for Catalonia |
| Succeeded by | Living Unified Socialist Party of Catalonia |
| Youth wing | Unified Socialist Youth of Catalonia (1936–1970) Communist Youth of Catalonia (1971–1992) |
| Women's wing | Women's Democratic Movement |
| Ideology | Communism Catalan nationalism Republicanism |
| Political position | Far-left |
| International affiliation | Comintern (1936–1943) |
| Trade union affiliation | Workers' Commissions (CCOO) |
The Unified Socialist Party of Catalonia (Catalan: Partit Socialista Unificat de Catalunya, PSUC) was a communist political party active in Catalonia between 1936 and 1997. It was the Catalan branch of the Communist Party of Spain and the only party not from a sovereign state to be a full member of the Third International.