Les Ulis (Les Ulis)
- commune in Essonne, France
- Country:
- Postal Code: 91940
- Coordinates: 48° 40' 56" N, 2° 10' 3" E
- GPS tracks (wikiloc): [Link]
- AboveSeaLevel: 155 м m
- Area: 5.18 sq km
- Population: 24764
- Web site: http://www.lesulis.fr
- Wikipedia en: wiki(en)
- Wikipedia: wiki(fr)
- Wikidata storage: Wikidata: Q216844
- Wikipedia Commons Category: [Link]
- Freebase ID: [/m/08yckw]
- GeoNames ID: Alt: [6615536]
- SIREN number: [219106929]
- BnF ID: [152802441]
- VIAF ID: Alt: [154631971]
- GND ID: Alt: [4495269-7]
- Library of Congress authority ID: Alt: [n92050090]
- SUDOC authorities ID: [026578417]
- INSEE municipality code: 91692
Shares border with regions:

Saint-Jean-de-Beauregard
- commune in Essonne, France
- Country:
- Postal Code: 91940
- Coordinates: 48° 39' 49" N, 2° 10' 4" E
- GPS tracks (wikiloc): [Link]
- Area: 3.97 sq km
- Population: 370
- Web site: [Link]

Villejust
- commune in Essonne, France
- Country:
- Postal Code: 91140
- Coordinates: 48° 40' 57" N, 2° 14' 11" E
- GPS tracks (wikiloc): [Link]
- Area: 5.36 sq km
- Population: 2301
- Web site: [Link]

Orsay
- commune in Essonne, France
- Country:
- Postal Code: 91400
- Coordinates: 48° 41' 53" N, 2° 11' 15" E
- GPS tracks (wikiloc): [Link]
- AboveSeaLevel: 90 м m
- Area: 7.97 sq km
- Population: 16530
- Web site: [Link]

Marcoussis
- commune in Essonne, France
- Country:
- Postal Code: 91460
- Coordinates: 48° 38' 30" N, 2° 13' 47" E
- GPS tracks (wikiloc): [Link]
- Area: 16.8 sq km
- Population: 8132
- Web site: [Link]


Bures-sur-Yvette
- commune in Essonne, France
- Country:
- Postal Code: 91440
- Coordinates: 48° 41' 48" N, 2° 9' 41" E
- GPS tracks (wikiloc): [Link]
- Area: 4.17 sq km
- Population: 9691
- Web site: [Link]


Gometz-le-Châtel
- commune in Essonne, France
- Country:
- Postal Code: 91940
- Coordinates: 48° 40' 43" N, 2° 8' 19" E
- GPS tracks (wikiloc): [Link]
- Area: 5.05 sq km
- Population: 2565
- Web site: [Link]


Villebon-sur-Yvette
- commune in Essonne, France
- Country:
- Postal Code: 91940
- Coordinates: 48° 42' 0" N, 2° 13' 40" E
- GPS tracks (wikiloc): [Link]
- Area: 7.41 sq km
- Population: 10455
- Web site: [Link]