Rosny-sur-Seine

Rosny-sur-Seine
Commune
Town hall
Coat of arms
Location of Rosny-sur-Seine
Rosny-sur-Seine Location within France Rosny-sur-Seine Location within Île-de-France (region)
Coordinates: 49°00′02″N 1°37′57″E
Country	France
Region	Île-de-France
Department	Yvelines
Arrondissement	Mantes-la-Jolie
Canton	Mantes-la-Jolie
Intercommunality	CU Grand Paris Seine et Oise
Government
• Mayor (2020–2026)	Pierre-Yves Dumoulin
Area 1	19.36 km2 (7.47 sq mi)
Population  (2023)	7,328
• Density	378.5/km2 (980.3/sq mi)
Time zone	UTC+01:00 (CET)
• Summer (DST)	UTC+02:00 (CEST)
INSEE/Postal code	78531 /78710
Elevation	17–144 m (56–472 ft) (avg. 30 m or 98 ft)
1 French Land Register data, which excludes lakes, ponds, glaciers > 1 km2 (0.386 sq mi or 247 acres) and river estuaries.

Rosny-sur-Seine (French pronunciation: [ʁoni syʁ sɛn], literally Rosny on Seine) is a commune in the Yvelines department in the Île-de-France in north-central France.

Population

Historical population

Year	Pop.	±% p.a.
1968	2,796	—
1975	3,541	+3.43%
1982	3,932	+1.51%
1990	4,606	+2.00%
1999	4,758	+0.36%
2007	5,181	+1.07%
2012	5,689	+1.89%
2017	6,433	+2.49%
2023	7,328	+2.19%
Source: INSEE

Notable people

• Roger Géri - (1947 – 2019) a French professional footballer died here.

See also

• Communes of the Yvelines department