Catalan State-Proletarian Party (, EC-PP) was a communist political party in Catalonia, Spain. Following a 1932 split in Estat CatalÃÂ (EC) over merging into the Republican Left of Catalonia, the left-wing Separatist Force of the Far-Left () sector of the party that opposed the merger formed EC-PP.
Leaders of EC-PP were Jaume Compte, Ramon Fabregat, Pere Aznar and Artur Cussó. EC-PP published L'Insurgent.
EC-PP made fruitless attempts to rally other forces to join a united party, and, in the end, it launched the Proletarian Catalan Party (January 1934).