Auch Population and Area (Gers)
Largest city in France 2026: up-to-date figures for Auch (Gers)
Auch: Population and Area
With 23,451 inhabitants (INSEE total population in force on January 1, 2026), Auch is the 394th most populous town in France in 2026 and the most populous in the Gers department, out of 458 communes. It covers 72 km² (496th largest area in France, 3rd largest in the department), with a population density of 324 inhabitants per km², or 3.0 times the national average (110 inhabitants/km²), which ranks it 2,793rd in France for density.
Auch is located in the Gers department (32), in the Occitanie region (formerly Midi-Pyrénées), where it ranks 23rd by population out of 4,446 communes. It is the most populous town in the Gers department, which is home to 198,955 people over 6,257 km².
See the full ranking of communes in the Gers department and the regional ranking: largest city in Occitanie.
Towns of similar size in the Gers department: L'Isle-Jourdain (pop. 9,806), Condom (pop. 6,650), Fleurance (pop. 6,331).
Sources: INSEE, official population figures in force on January 1, 2026 (total population); areas: IGN / Observatoire des territoires; INSEE code 32013. Rankings are calculated across the 34,858 communes of metropolitan and overseas France in our database.