The Territoire de Belfort is a department in the northeastern French region of Bourgogne-Franche-Comté. In 2020 it had a population of 140,120…The Territoire de Belfort is a department in the northeastern French region of Bourgogne-Franche-Comté. In 2020 it had a population of 140,120. The department, which encompasses a relatively small surface area of 609.4 km², is located just southwest of the European Collectivity of Alsace. It also shares a border with the Swiss canton of Jura to the southeast. Its prefecture is Belfort.