Boullay-les-Troux
Commune
The town hall in Boullay-les-Troux
Location of Boullay-les-Troux
Boullay-les-Troux Show map of France Boullay-les-Troux Show map of Île-de-France (region)
Coordinates: 48°40′42″N 2°02′59″E / 48.6782°N 2.0498°E / 48.6782; 2.0498
Country	France
Region	Île-de-France
Department	Essonne
Arrondissement	Palaiseau
Canton	Gif-sur-Yvette
Intercommunality	Pays de Limours
Government
• Mayor (2020–2026)	Hugues-Alexandre Rousseau
Area 1	4.80 km2 (1.85 sq mi)
Population  (Jan. 2019)[1]	648
• Density	140/km2 (350/sq mi)
Time zone	UTC+01:00 (CET)
• Summer (DST)	UTC+02:00 (CEST)
INSEE/Postal code	91093 /91470
Elevation	99–177 m (325–581 ft)
1 French Land Register data, which excludes lakes, ponds, glaciers > 1 km2 (0.386 sq mi or 247 acres) and river estuaries.

Boullay-les-Troux is a commune. It is in Île-de-France in the Essonne department in north France. It is 30 km southwest of Paris.

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