Roman Catholic Diocese of Banja Luka

Diocese of Banja Luka Dioecesis Banialucensis Banjolučka biskupija
Cathedral of Saint Bonaventure
Coat of Arms of diocese of Banja Luka
Location
Country	Bosnia and Herzegovina
Ecclesiastical province	Archdiocese of Vrhbosna
Deaneries	Banja Luka Livno Jajce Bihać Prnjavor Bosanska Gradiška
Statistics
Area	16,457 km2 (6,354 sq mi)
Population - Total - Catholics	(as of 2022) 735,000[1] 24,660[1] (3.36%)
Parishes	48[1]
Information
Denomination	Catholic
Sui iuris church	Latin Church
Rite	Roman Rite
Established	5 July 1881
Cathedral	Cathedral of Saint Bonaventure
Patron saint	Saint Bonaventure
Secular priests	34[2]
Current leadership
Pope	Francis
Bishop	Željko Majić
Metropolitan Archbishop	Tomo Vukšić
Auxiliary Bishops	Marko Semren
Vicar General	Anto Orlovac
Bishops emeritus	Franjo Komarica
Map
Website
biskupija-banjaluka.org

The Diocese of Banja Luka (Latin: Dioecesis Banialucensis; Croatian: Banjolučka biskupija) is a Latin Church diocese of the Catholic Church in western Bosnia. The diocese is centred in the city of Banja Luka, Bosnia and Herzegovina.

Erected on July 5, 1881, the diocese is a suffragan of the Archdiocese of Vrhbosna, as the Diocese of Banjaluka. In 1985, the name of the diocese was split to the current diocese of Banja Luka. The current bishop of Banja Luka is Rev. Željko Majić.

The original Cathedral of Saint Bonaventure in the city was built in 1887. However, an earthquake in 1969 levelled the church. Banja Luka's current cathedral was built in 1974.

The city of Banja Luka, and much of the territory that the diocese covers contains an Orthodox Christian majority. The Bosnian War greatly affected the diocese. Virtually all of the churches in the bishopric sustained some damage, and many were destroyed. Many Catholics were expelled from the region or fled, leaving only a fraction remaining. Bishop Komarica has been urging people to return, to mixed results.