Heidenheim an der Brenz (short: Heidenheim) is a town in
Baden-Württemberg in southern
Germany. It is located near the border with
Bavaria, approximately 17 km south of
Aalen and 33 km north of
Ulm. Heidenheim is the largest town and the seat of the
district of Heidenheim, and ranks third behind Aalen and
Schwäbisch Gmünd in size among the towns in the region of East Württemberg. Heidenheim is the economic center for all the communities in Heidenheim district and is the headquarters of the
Voith industrial company. The town's population passed the 20,000 mark in 1925. Heidenheim collaborates with the town of Nattheim in administrative matters.