Tuzla, Serbo-Croatian Cyrillic: Тузла, Serbo-Croatian pronunciation: ) is the third-largest city of Bosnia and Herzegovina and the administrativ…Tuzla, Serbo-Croatian Cyrillic: Тузла, Serbo-Croatian pronunciation: ) is the third-largest city of Bosnia and Herzegovina and the administrative center of Tuzla Canton of the Federation of Bosnia and Herzegovina. As of 2013, it has a population of 110,979 inhabitants.