Auch
Cathedral in the town centre.
Administration
Country	France
Region	Midi-Pyrénées
Department	Gers
Arrondissement	Auch
Canton	Auch-1 Auch-2 Auch-3
Intercommunality	Grand Auch
Mayor	Franck Montaugé (2014–2020)
Statistics
Elevation	115–281 m (377–922 ft) (avg. 166 m/545 ft)
Land area1	72.48 km2 (27.98 sq mi)
Population2	21,960  (2012)
- Density	303/km2 (780/sq mi)
INSEE/Postal code	32013/ 32000
Website	www.mairie-auch.fr
1 French Land Register data, which excludes lakes, ponds, glaciers > 1 km² (0.386 sq mi or 247 acres) and river estuaries.
2Population without double counting: residents of multiple communes (e.g., students and military personnel) only counted once.

Auch (Gascon: Aush or Aux) is a commune in southwestern France, in the region of Occitanie. It is the prefecture (capital) of the Gers department. It is also the capital of 3 cantons: Auch-1, Auch-2 and Auch-3.

Auch is the historical capital of Gascony and the people of this city are known, in French, as auscitain (women: auscitaines).