Montrouge is located in Paris city, France at the 48.8162, 2.3139 coordinates. Distance from Montrouge to other cities. are listed below, click on the city name to find distance between. Distance from Montrouge to Cergy-Pontoise 30 km, to Saint-Quentin-en-Yvelines 22 km, to Boulogne-Billancourt 5 km. The green marker indicates the location of Montrouge.