Montluçon Population and Area (Allier)
Largest city in France 2026: up-to-date figures for Montluçon (Allier)
Montluçon: Population and Area
With 34,107 inhabitants (INSEE total population in force on January 1, 2026), Montluçon is the 246th most populous town in France in 2026 and the most populous in the Allier department, out of 317 communes. It covers 21 km² (7,624th largest area in France, 170th largest in the department), with a population density of 1,650 inhabitants per km², or 15 times the national average (110 inhabitants/km²), which ranks it 564th in France for density.
Montluçon is located in the Allier department (03), in the Auvergne-Rhône-Alpes region (formerly Auvergne), where it ranks 26th by population out of 4,025 communes. It is the most populous town in the Allier department, which is home to 341,713 people over 7,340 km².
See the full ranking of communes in the Allier department and the regional ranking: largest city in Auvergne-Rhône-Alpes.
Towns of similar size in the Allier department: Vichy (pop. 25,445), Moulins (pop. 19,714), Cusset (pop. 13,822).
Sources: INSEE, official population figures in force on January 1, 2026 (total population); areas: IGN / Observatoire des territoires; INSEE code 03185. Rankings are calculated across the 34,858 communes of metropolitan and overseas France in our database.