Houilles (French pronunciation: [uj] ⓘ) is a commune in the Yvelines department in the Île-de-France region in north-central France.

Until 2000, the command post of the French Navy's Ballistic Missile Submarine Force was based at Houilles.

Victor Schœlcher, a French abolitionist writer in the 19th century and the main spokesman for a group from Paris who worked for the abolition of slavery died in Houilles on 25 December 1893.

A nursery school, a street and a statue carry his name.

Houilles is served by Houilles–Carrières-sur-Seine station on Paris RER line A and on the Transilien Paris-Saint-Lazare suburban rail line.