Saint-Cyr-sous-Dourdan (Saint-Cyr-sous-Dourdan)
- commune in Essonne, France
- Country:
- Postal Code: 91410
- Coordinates: 48° 34' 7" N, 2° 2' 10" E
- GPS tracks (wikiloc): [Link]
- Area: 9.89 sq km
- Population: 1003
- Wikipedia en: wiki(en)
- Wikipedia: wiki(fr)
- Wikidata storage: Wikidata: Q1068000
- Wikipedia Commons Category: [Link]
- Freebase ID: [/m/03mh6pz]
- Freebase ID: [/m/03mh6pz]
- GeoNames ID: Alt: [2980937]
- GeoNames ID: Alt: [2980937]
- SIREN number: [219105467]
- SIREN number: [219105467]
- BnF ID: [15280198p]
- BnF ID: [15280198p]
- VIAF ID: Alt: [141062417]
- VIAF ID: Alt: [141062417]
- INSEE municipality code: 91546
- INSEE municipality code: 91546
Shares border with regions:

Angervilliers
- commune in Essonne, France
- Country:
- Postal Code: 91470
- Coordinates: 48° 35' 34" N, 2° 3' 55" E
- GPS tracks (wikiloc): [Link]
- Area: 9.01 sq km
- Population: 1624


Le Val-Saint-Germain
- commune in Essonne, France
- Country:
- Postal Code: 91530
- Coordinates: 48° 33' 54" N, 2° 3' 50" E
- GPS tracks (wikiloc): [Link]
- Area: 12.57 sq km
- Population: 1437
- Web site: [Link]


Longvilliers
- commune in Yvelines, France
- Country:
- Postal Code: 78730
- Coordinates: 48° 34' 44" N, 1° 59' 32" E
- GPS tracks (wikiloc): [Link]
- Area: 13.91 sq km
- Population: 498
- Web site: [Link]


Dourdan
- commune in Essonne, France
- Country:
- Postal Code: 91410
- Coordinates: 48° 31' 44" N, 2° 0' 39" E
- GPS tracks (wikiloc): [Link]
- Area: 30.64 sq km
- Population: 10673
- Web site: [Link]


Roinville
- commune in Essonne, France
- Country:
- Postal Code: 91410
- Coordinates: 48° 31' 53" N, 2° 2' 43" E
- GPS tracks (wikiloc): [Link]
- Area: 13.4 sq km
- Population: 1363
- Web site: [Link]