| Unit Name: | 4th Krajina Division |
| Dates: | 1942–1945 |
| Country: | Democratic Federal Yugoslavia |
| Branch: | Yugoslav Partisan Army |
| Type: | Infantry |
| Size: | 4,371 (upon formation) |
| Command Structure: | 1st Bosnian Corps (9 November 1942 - 11 May 1943) 2nd Bosnian Corps (11 May 1943 - 1945) |
| Battles: | World War II in Yugoslavia |
| Notable Commanders: | Josip Mažar Šoša |
The 4th Krajina Division (Serbo-Croatian Latin: Četvrta krajiška divizija) was a Yugoslav Partisan division formed in Glamočko polje on 9 November 1942. On the day of formation it consisted of 4,371 soldiers in three brigades: 2nd Krajina Brigade, 5th Krajina Brigade and 6th Krajina Brigade. Commander of the division was Josip Mažar Šoša, while its political commissar was Milinko Kušić.[1] During the war it mostly operated in western and central Bosnia. It was a part of 1st Bosnian Corps until 11 May 1943 when it became part of 2nd Bosnian Corps.[2]