Catalan State-Proletarian Party (in Catalan: Estat Català-Partit Proletari, EC-PP) was a communist political party in Catalonia, Spain. It was formed in 1932 by the left-wing sector of Estat Català (EC), those who did not approve of group merging into the Republican Left of Catalonia.Leaders of EC-PP were Jaume Compte, Ramon Fabregat, Pere Aznar and Artur Cussó.