Pontoise is located in Paris city, France at the 49.05, 2.1 coordinates. Distance from Pontoise to other cities. are listed below, click on the city name to find distance between. Distance from Pontoise to Cergy-Pontoise 2 km, to Saint-Quentin-en-Yvelines 31 km, to Boulogne-Billancourt 26 km. The green marker indicates the location of Pontoise.