Houilles is located in Paris city, France at the 48.9216, 2.1926 coordinates. Distance from Houilles to other cities. are listed below, click on the city name to find distance between. Distance from Houilles to Cergy-Pontoise 15 km, to Saint-Quentin-en-Yvelines 21 km, to Boulogne-Billancourt 11 km. The green marker indicates the location of Houilles.