Sontheim an der Brenz is a municipality situated in the district of Heidenheim within the state of Baden-Württemberg in southern Germany. Geographically, it is positioned northeast of the city of Ulm and lies at the southern end of the Swabian Jura.
The town serves as a local administrative and residential area characterized by its location in the rural landscape of the region. It is defined by its proximity to significant geological features and its position within the state's southeastern territory.