Oštra Luka

The municipality is located between the municipalities of Novi Grad and Prijedor in the north, Banja Luka in the east, Ribnik in the south, Sanski Most in the south and west, and Bosanska Krupa in the west. The territory of the municipality follows the Inter-Entity Boundary Line. Alongside Oštra Luka, other villages forming the municipality are Batkovci, Budimlić Japra, Donja Kozica, Donja Tramošnja, Duge Njive, Garevica, Gornja Kozica, Gornja Tramošnja, Hadrovci, Halilovci, Hazići, Koprivna, Marini, Mrkalji, Ovanjska, Podvidača, Sasina, Slatina, Stara Rijeka, Škrljevita, Trnova, Usorci, Zenkovići.

Contemporary administrative villages of Batkovci, Donja Kozica, Donja Tramošnja, Gornja Kozica, Gornja Tramošnja, Hadrovci, Koprivna, Mrkalji, Podvidača, Sasina, Slatina, Stara Rijeka, Škrljevita, Trnova, Zenkovići were created by the Inter-Entity Boundary Line between the Oštra Luka and Sanski Most municipality of the Una-Sana Canton. The boundary creates divided settlements which for administrative purposes function as independent villages while geographically and sociologically forming a single unit.