| Catalan State-Proletarian Party | |
| Native Name: | Estat Català-Partit Proletari |
| Split: | Estat Català |
| Merged: | Proletarian Catalan Party |
| Headquarters: | Barcelona |
| Newspaper: | L'Insurgent |
| Position: | Left |
| Colors: | Red Yellow |
| Colorcode: | red |
| Country: | Spain |
| State: | Catalonia |
Catalan State-Proletarian Party (Catalan; Valencian: 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. 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).