Kotor Varoš is a town and municipality in Republika Srpska, Bosnia and Herzegovina. As of 2013 census, the municipality has a population o…Kotor Varoš is a town and municipality in Republika Srpska, Bosnia and Herzegovina. As of 2013 census, the municipality has a population of 19,710 inhabitants, while the town of Kotor Varoš has a population of 7,330 inhabitants.