Saint-Sébastien-sur-Loire Population and Area (Loire-Atlantique)

Saint-Sébastien-sur-Loire: Population and Area

With 29,151 inhabitants (INSEE total population in force on January 1, 2026), Saint-Sébastien-sur-Loire is the 304^th most populous town in France in 2026 and the 6^th most populous in the Loire-Atlantique department, out of 207 communes. It covers 12 km² (16,307^th largest area in France, 184^th largest in the department), with a population density of 2,500 inhabitants per km², or 23 times the national average (110 inhabitants/km²), which ranks it 362^nd in France for density.

Saint-Sébastien-sur-Loire is located in the Loire-Atlantique department (44), in the Pays de la Loire region, where it ranks 12^th by population out of 1,228 communes. The most populous town in the Loire-Atlantique department is Nantes (332,515 inhabitants); the department is home to 1,517,043 people over 6,874 km².

See the full ranking of communes in the Loire-Atlantique department and the regional ranking: largest city in Pays de la Loire.

Towns of similar size in the Loire-Atlantique department: Saint-Herblain (pop. 51,681), Rezé (pop. 44,286), Orvault (pop. 29,176), Vertou (pop. 26,684), Couëron (pop. 24,367), Carquefou (pop. 21,509).

Sources: INSEE, official population figures in force on January 1, 2026 (total population); areas: IGN / Observatoire des territoires; INSEE code 44190. Rankings are calculated across the 34,858 communes of metropolitan and overseas France in our database.