Hergatz is a municipality in the district of Lindau in Bavaria, Germany. The contemporary town was formed from the former municipalities of Wohmbrechts and Maria-Thann in the course of the municipal reform at the end of the 1970s.
The districts of Grod, Beuren, Möllen, Wohmbrechts and Hergatz are located at the Bundesstraße 12 (federal road 12) Munich - Lindau, approximately 20 km from Lindau. The B 12 forms a cross-town link in Wohmbrechts.
The districts of Grod, Staudach and Handwerks border on the upper Argen, a river, which rises north of Oberstaufen from several brooks, merges with the lower Argen near Neuravensburg and disembogues into Lake Constance near Langenargen. In Muthen, the railroad line crosses the small river Leiblach.