Unfortunately there has been no census since the end of the war, so there is no official data. The estimate ethnic composition in Republika Srpska in 2006 was Serb Orthodox 88%, Bosniaks constitute 8% of the population and Roman Catholics 4%.  Bosniaks are associated with Islam, Bosnian Croats with the Roman Catholic Church, and Bosnian Serbs with the Serb Orthodox Church.