Auch Cathedral (Cathédrale Sainte-Marie d'Auch) is a Roman Catholic cathedral, and a national monument of France, located in the town of Auch in the Midi-Pyrénées. It is the seat of the Archbishopric of Auch, which under the Concordat of 1801 was suppressed and added to the Diocese of Agen, but restored in 1822.

The cathedral contains a suite of 18 Renaissance stained glass windows by Arnaud de Moles.