Guyancourt is located in Paris city, France at the 48.7733, 2.0739 coordinates. Distance from Guyancourt to other cities. are listed below, click on the city name to find distance between. Distance from Guyancourt to Cergy-Pontoise 30 km, to Saint-Quentin-en-Yvelines 4 km, to Boulogne-Billancourt 15 km. The green marker indicates the location of Guyancourt.