Saint-Martin-d'Hères Population and Area (Isère)
Largest city in France 2026: up-to-date figures for Saint-Martin-d'Hères (Isère)
Saint-Martin-d'Hères: Population and Area
With 37,921 inhabitants (INSEE total population in force on January 1, 2026), Saint-Martin-d'Hères is the 211th most populous town in France in 2026 and the 2nd most populous in the Isère department, out of 512 communes. It covers 9.26 km² (20,420th largest area in France, 314th largest in the department), with a population density of 4,095 inhabitants per km², or 37 times the national average (110 inhabitants/km²), which ranks it 193rd in France for density.
Saint-Martin-d'Hères is located in the Isère department (38), in the Auvergne-Rhône-Alpes region (formerly Rhône-Alpes), where it ranks 19th by population out of 4,025 communes. The most populous town in the Isère department is Grenoble (158,303 inhabitants); the department is home to 1,324,225 people over 7,431 km².
See the full ranking of communes in the Isère department and the regional ranking: largest city in Auvergne-Rhône-Alpes.
Towns of similar size in the Isère department: Grenoble (pop. 158,303), Échirolles (pop. 37,710), Vienne (pop. 32,216), Bourgoin-Jallieu (pop. 30,773).
Sources: INSEE, official population figures in force on January 1, 2026 (total population); areas: IGN / Observatoire des territoires; INSEE code 38421. Rankings are calculated across the 34,858 communes of metropolitan and overseas France in our database.