The Eparchy of Banja Luka (Serbian: Епархија бањалучка) is an eparchy (diocese) of the Serbian Orthodox Church with its seat in Banja Luka, Bosnia and Herzegovina.

Until 1900, territory of this eparchy belonged to the Eastern Orthodox Metropolitanate of Dabar and Bosnia, which in turn was under the ecclesiastical jurisdiction of the Ecumenical Patriarchate of Constantinople.

Bishop of Banja Luka was granted the honorary title of Metropolitan, as was the custom in Ecumenical Patriarchate of Constantinople.

Arrangements with the Ecumenical Patriarchate were made, and the canonical process of unification was completed in 1920.

[3] Since then, Eparchy of Banja Luka has been part of the Serbian Orthodox Church.