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Les Ulis

Les Ulis
Housing projects
Housing projects
Coat of arms of Les Ulis
Coat of arms
Location (in red) within Paris inner and outer suburbs
Location (in red) within Paris inner and outer suburbs
Coordinates: 48°40′56″N 2°10′11″E / 48.6822°N 2.1698°E / 48.6822; 2.1698Coordinates: 48°40′56″N 2°10′11″E / 48.6822°N 2.1698°E / 48.6822; 2.1698
Country France
Region Île-de-France
Department Essonne
Arrondissement Palaiseau
Canton Les Ulis
Government
 • Mayor (2014–2020) Françoise Marhuenda
Area1 5.18 km2 (2.00 sq mi)
Population (2006)2 24,791
 • Density 4,800/km2 (12,000/sq mi)
Time zone CET (UTC+1)
 • Summer (DST) CEST (UTC+2)
INSEE/Postal code 91692 / 91940
Elevation 87–170 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.

2Population without double counting: residents of multiple communes (e.g., students and military personnel) only counted once.

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: ​[lɛz ylis]) is a commune in the Essonne department located in the southwestern suburbs (banlieue) of Paris, France. It is 23 km (14 mi) from the centre of Paris.

Inhabitants of Les Ulis are known as Ulissiens.

Les Ulis is a new town located in the Île-de-France, in the south-west of the Parisian agglomeration and in the north-west of the Essonne department. It sits on the Courtabœuf plateau which dominates the Yvette valley, also known as the Chevreuse valley. It is 23 km to the south-west of central Paris, 20 km north-west of Évry and 14 km to the south-east of Versailles.

The town is laid out in the form of a U, approximately three km by two km, and covers 680 hectares. Over 65% of the area is built-up, 17% is semi-rural and 16% is either rural or comprises communal green space. The French Institut Géographique National gives the co-ordinates of the town as 48°40'58" N and 02°09'55" E at the central point.

The source of the minor river Rouillon (river) is in the neighbouring town of Villejust, close to the communal border. The lowest point of the town, at the point where it meets Bures-sur-Yvette, is at an altitude of 87m. Most of the town is situated at an average altitude of over 150m. Its highest point is at 170m. The land on which it is built consists of clay, sand and millstone.


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