Diocese of Banja Luka may refer to:
- Serbian Orthodox Diocese of Banja Luka, diocese (eparchy) of the Serbian Orthodox Church, in western part of Bosnia and Herzegovina.
- Roman Catholic Diocese of Banja Luka, diocese of the Catholic Church, in western part of Bosnia and Herzegovina.
See also
- Banja Luka
- Eastern Orthodoxy in Bosnia and Herzegovina
- Catholic Church in Bosnia and Herzegovina
- Diocese of Sarajevo (disambiguation)
- Diocese of Trebinje (disambiguation)
- Diocese of Mostar (disambiguation)
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