Jura is a department in the eastern French region of Bourgogne-Franche-Comté. The department takes its name from the Jura Mountains. Its …Jura is a department in the eastern French region of Bourgogne-Franche-Comté. The department takes its name from the Jura Mountains. Its prefecture is Lons-le-Saunier; subprefectures are Dole and Saint-Claude. In 2019, Jura had a population of 259,199. Its INSEE code is 39. It has a short portion of the border of Switzerland.