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Longpont-sur-Orge
	Commune of Longpont-sur-Orge
	Location
Coordinates	48°38′37″N 2°17′32″E / 48.64361°N 2.29222°E
Administration
Country	France
Region	Île-de-France
Department	Essonne
Arrondissement	Palaiseau
Canton	Montlhéry
Intercommunality	CC Cœur du Hurepoix
Mayor	Delphine Antonetti; (2008–2014)
Statistics
Elevation	37–96 m (120–310 ft)
Land area1	5.05 km2 (1.95 sq mi)
Population2	5,843 (1999)
- Density	1,157 /km2 (3,000 /sq mi)
	Miscellaneous
INSEE/Postal code	91347/ 91310
	1 French Land Register data, which excludes lakes, ponds, glaciers > 1 km² (0.386 sq mi or 247 acres) and river estuaries.
	2 Population sans doubles comptes: residents of multiple communes (e.g., students and military personnel) only counted once.