Republika Srpska (Serbian Cyrillic: Република Српска [repǔblika sr̩̂pskaː] ), also referred to as the Republic of Srpska or the Serb Republic, is one of the three political divisions of Bosnia and Herzegovina, the others being the Federation of Bosnia and Herzegovina and the Brčko District. Situated in the northern and eastern regions of the country, it recorded a population of 1,228,423 in the 2013 census. Its largest city and administrative hub is Banja Luka, located on the banks of the Vrbas River.
Republika Srpska was established in 1992 at the onset of the Bosnian War with the stated purpose of safeguarding the interests of the Serbs of Bosnia and Herzegovina. During the conflict, the expulsion of the majority of Croats and Bosniaks from territories controlled by Republika Srpska occurred, while the majority of Serbs were displaced or expelled from the present-day Federation of Bosnia and Herzegovina to Republika Srpska. The 1995 Dayton Agreement created Republika Srpska as one of Bosnia and Herzegovina's two constituent entities. Today, it is inhabited by the Serb population of the country.