The arrondissement of Auch is an arrondissement of France in the Gers department in the Occitanie region.

[2] Its population is 84,027 (2021), and its area is 1,923.5 km2 (742.7 sq mi).

[3] The communes of the arrondissement of Auch, and their INSEE codes, are:[2] The arrondissement of Auch was created in 1800.

[5] As a result of the reorganisation of the cantons of France which came into effect in 2015, the borders of the cantons are no longer related to the borders of the arrondissements.

The cantons of the arrondissement of Auch were, as of January 2015:[6]