Le Chesnay is a former commune in the Yvelines department in the Île-de-Franceregion in north-central France. On 1 January 2019, it was merged into the new commune Le Chesnay-Rocquencourt. It is located in the western suburbs of Paris, 16.7 km (10.4 mi) from the center of Paris. Country France Region Île-de-France Department Yvelines Canton Le Chesnay Commune Le Chesnay-Rocquencourt Area1 4.24 km2 (1.64 sq mi) Population 27,690 Time zone UTC+01:00 (CET) Summer (DST) […]