The 4th Corps (Serbo-Croatian Latin: Četvrti korpus) was a Yugoslav Partisan corps that fought against the Germans, Independent State of Croatia (NDH) and Chetniks in occupied Democratic Federal Yugoslavia during World War II.
It was created on 22 November 1942 with the 6th Lika, 7th Banija and 8th Kordun divisions as the 1st Croatian Corps.
Political Comissar Većeslav Holjevac, future Mayor of Zagreb.
During 1943, it conducted successful actions and created liberated territory between the rivers Una and Sava, in Slovenia, Gorski Kotar and Lika.
In the 1945 final operations of the Yugoslav Army, the Corps participated in the liberation of Bihać, Lika, Karlovac and Zagreb.