Chalo-Saint-Mars
Commune
The town hall in Chalo-Saint-Mars
Coat of arms
Location of Chalo-Saint-Mars
Chalo-Saint-Mars Show map of France Chalo-Saint-Mars Show map of Île-de-France (region)
Coordinates: 48°25′36″N 2°04′01″E / 48.4267°N 2.067°E / 48.4267; 2.067
Country	France
Region	Île-de-France
Department	Essonne
Arrondissement	Étampes
Canton	Étampes
Intercommunality	Étampois Sud Essonne
Government
• Mayor (2020–2026)	Xavier Guiomar
Area 1	28.67 km2 (11.07 sq mi)
Population  (Jan. 2019)[1]	1,026
• Density	36/km2 (93/sq mi)
Time zone	UTC+01:00 (CET)
• Summer (DST)	UTC+02:00 (CEST)
INSEE/Postal code	91130 /91780
Elevation	81–152 m (266–499 ft)
1 French Land Register data, which excludes lakes, ponds, glaciers > 1 km2 (0.386 sq mi or 247 acres) and river estuaries.

Chalo-Saint-Mars is a commune. It is in Île-de-France in the Essonne department in north France.

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