Teočak is a town and municipality in the northeastern part Bosnia and Herzegovina. Center of the municipality is town of Teočak-Krstac. The town of Teočak is located north of Kalesija and northeast of Tuzla. It is administratively part of the Tuzla Canton and the Federation of Bosnia and Herzegovina. During the 1990s, due to the Bosnian war, the area of Teočak received several hundred Bosniak refugees from primarily the north and northeast areas of Teočak.
Before the war, Teočak was part of the Ugljevik municipality, and became itself a municipality as part of the Dayton Agreement.