Ostwürttemberg (East Württemberg) is a region in eastern Baden-Württemberg, Germany, in the Stuttgart subdivision (Regierungsbezirk). It is located in the southwestern part of Germany. It consists of the districts of Heidenheim and Ostalb. It borders the Stuttgart Region to the west, the Heilbronn-Franken Region to the north, western Middle Franconia (Bavaria) to the east, Bavarian Swabia to the southeast, and the Alb-Danube district to the south.