Les Ulis

Les Ulis
Médiathèque François Mitterrand
Location (in red) within Paris inner and outer suburbs
Location of Les Ulis
Les Ulis
Les Ulis
Coordinates: 48°40′56″N 2°10′11″E / 48.6822°N 2.1698°E / 48.6822; 2.1698
CountryFrance
RegionÎle-de-France
DepartmentEssonne
ArrondissementPalaiseau
CantonLes Ulis
IntercommunalityCA Paris-Saclay
Government
 • Mayor (2020–2026) Clovis Cassan
Area
1
5.18 km2 (2.00 sq mi)
Population
 (2023)
25,886
 • Density5,000/km2 (12,900/sq mi)
DemonymUlissiens
Time zoneUTC+01:00 (CET)
 • Summer (DST)UTC+02:00 (CEST)
INSEE/Postal code
91692 /91940
Elevation87–170 m (285–558 ft)
(avg. 155 m or 509 ft)
1 French Land Register data, which excludes lakes, ponds, glaciers > 1 km2 (0.386 sq mi or 247 acres) and river estuaries.

Les Ulis (French pronunciation: [lez‿ylis] ) is a commune in the Essonne department, 23 km (14 mi) from the centre of Paris, France. A planned community, it comprises outer suburbs (banlieues) built in the 1970s on the southwestern edge of the Paris metropolitan area. As of 2023, the population of the commune was 25,886.