The Bihać Republic was a short-lived republic that existed between November 1942 and January 1943 in a liberated area of Nazi-occupied Yugoslavia. It was established by the Partisan resistance movement following the liberation of Bihać. Bihać became its administrative center and the first session of the Anti-Fascist Council of the People's Liberation of Yugoslavia (AVNOJ) was held there on 26 November 1942.

Bihać is a city and the administrative centre of Una-Sana Canton of the Federation of Bosnia and Herzegovina, an entity of Bosnia and Herzegovina. It is situated on the banks of river Una in northwestern Bosnia and Herzegovina, in the Bosanska Krajina region. In 2013 its population was 56,261.