Cergy

Cergy
The old Hôtel de Ville (town hall)
Location (in red) within Paris inner and outer suburbs
Location of Cergy
Cergy
Cergy
Coordinates: 49°02′10″N 2°03′47″E / 49.0361°N 2.0631°E / 49.0361; 2.0631
CountryFrance
RegionÎle-de-France
DepartmentVal-d'Oise
ArrondissementPontoise
CantonCergy-1 and 2
IntercommunalityCergy-Pontoise
Government
 • Mayor (2020–2026) Jean-Paul Jeandon
Area
1
11.68 km2 (4.51 sq mi)
Population
 (2023)
70,906
 • Density6,071/km2 (15,720/sq mi)
Time zoneUTC+01:00 (CET)
 • Summer (DST)UTC+02:00 (CEST)
INSEE/Postal code
95127 /95000
Elevation21–121 m (69–397 ft)
(avg. 25 m or 82 ft)
1 French Land Register data, which excludes lakes, ponds, glaciers > 1 km2 (0.386 sq mi or 247 acres) and river estuaries.

Cergy (French pronunciation: [sɛʁʒi] ) is a commune in the French department of Val-d'Oise, to the northwest of Paris. It is located 27.8 km (17.3 mi) from the centre of Paris, in the "new town" of Cergy-Pontoise, created in the 1960s, of which it is the central and most populated commune.

Although neighbouring Pontoise is the official préfecture (capital) of the Val-d'Oise département, the préfecture building and administration, as well as the department council (conseil général), are located inside the commune of Cergy. The sous-préfecture building and administration, on the other hand, are located inside the commune of Pontoise.