Orsay

Orsay is a commune in the southwestern region around Paris, situated in the Île-de-France. The place has a mixed character of residential areas, research campuses, and older village structures, with the university taking up a large portion of the local landscape.

First records of Orsay date from 999, and a church was built there in 1157. Over the centuries the place changed hands several times, before redefining itself in the mid-20th century as a research hub with the founding of a nuclear physics institute.

Paris-Saclay University shapes the character of this place and gives it a scientific atmosphere visible in its streets. You encounter research buildings and students everywhere, and they form part of the everyday rhythm here.

The commune is well served by two RER B stations: Le Guichet and Orsay-Ville connect the place directly to Paris. If you spend time there, note that much of the grounds belong to the university campus and are not always freely accessible.

This place was a center of nuclear research in the mid-20th century and contributed significantly to French scientific breakthroughs. This connection to early atomic science remains visible today in the local infrastructure and reputation of the area.

Location: Essonne

Location: arrondissement of Palaiseau

Elevation above the sea: 113 m

Shares border with: Saclay, Les Ulis, Bures-sur-Yvette, Gif-sur-Yvette, Palaiseau, Villebon-sur-Yvette

Phone: +33160928000

Email: contact@mairie-orsay.fr

Website: https://mairie-orsay.fr

GPS coordinates: 48.69806,2.18750

Latest update: December 14, 2025 18:26