Banja Luka (Serbian Cyrillic: Бања Лука, pronounced [bǎɲa lǔːka] (listen)) or Banjaluka (Serbian Cyrillic: Бањалука, pronounced [baɲalǔːka]) is the second largest city in Bosnia and Herzegovina and the largest city of Republika Srpska. Banja Luka is also the de facto capital of this entity. It is the traditional centre of the densely-forested Bosanska Krajina region of northwestern Bosnia. According to the 2013 census, the city proper has a population of 138,963, while its administrative area comprises a total of 185,042 inhabitants.
The city is home to the University of Banja Luka and University Clinical Center of the Republika Srpska, as well as numerous entity and state institutions for Republika Srpska and Bosnia and Herzegovina respectively. The city lies on the Vrbas river and is well known in the countries of the former Yugoslavia for being full of tree-lined avenues, boulevards, gardens, and parks. Banja Luka was designated European city of sport in 2018.