Kotor Varoš
The largest city, and its historical center is Banja Luka. Other settlements include Bihać, Bosanska Krupa, Bosanski Petrovac, Bosansko Grahovo, Bužim, Cazin, Čelinac, Drvar, Gradiška, Jezero, Ključ, Kneževo, Kostajnica, Kotor Varoš, Kozarska Dubica, Laktaši, Mrkonjić Grad, Novi Grad, Oštra Luka, Prijedor, Sanski Most, Šipovo, Velika Kladuša.