Proletarian Catalan Party (Catalan: Partit Català Proletari) was a political party in Catalonia, Spain. PCP was founded in January 1934. Its main leader was Jaume Compte. PCP had its origins in the Estat Català-Partit Proletari, founded in 1932. The goal of PCP was the creation of a Catalan Socialist Republic. The party had a large influence with the trade union Centre Autonomista de Dependents de Comerç i Industria (CADCI). In 1936 Peres Aznar, a PCP deputy in the Cortes, was elected president of CADCI. In 1936 PCP merged with other groups to form the Unified Socialist Party of Catalonia.