Coordinates: 48°55′34″N 2°11′21″E / 48.9261°N 2.1892°E
Houilles is a commune in the Yvelines department in the Île-de-France region in north-central France. It is located 14.2 km (8.8 mi) from the center of Paris.
Houilles is served by Houilles – Carrières-sur-Seine station on Paris RER line A and on the Transilien Paris – Saint-Lazare suburban rail line.
Until 2000, the command post of French Navy's Ballistic Missile Submarine Force was based at Houilles.
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