Rosny-sur-Seine

Commune in Île-de-France, France

Coat of arms

Location of Rosny-sur-Seine

(2020–2026) Pierre-Yves Dumoulin^[1]Area

19.36 km² (7.47 sq mi)Population

(2021)^[2]

6,929 • Density360/km² (930/sq mi)Time zoneUTC+01:00 (CET) • Summer (DST)UTC+02:00 (CEST)INSEE/Postal code

78531 /78710

Elevation17–144 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%
Source: INSEE^[3]

References

^ "Répertoire national des élus: les maires" (in French). data.gouv.fr, Plateforme ouverte des données publiques françaises. 13 September 2022.
^ "Populations légales 2021". The National Institute of Statistics and Economic Studies. 28 December 2023.
^ Population en historique depuis 1968, INSEE