Hopatcong is located in Trenton city, United States at the 40.9329, -74.6593 coordinates. Distance from Hopatcong to other cities. are listed below, click on the city name to find distance between. Distance from Hopatcong to Newark 46 km, to Jersey City 54 km, to Paterson 41 km. The green marker indicates the location of Hopatcong.