Choisy-le-Roi is located in Paris city, France at the 48.7685, 2.4187 coordinates. Distance from Choisy-le-Roi to other cities. are listed below, click on the city name to find distance between. Distance from Choisy-le-Roi to Cergy-Pontoise 39 km, to Saint-Quentin-en-Yvelines 29 km, to Boulogne-Billancourt 14 km. The green marker indicates the location of Choisy-le-Roi.