Mountain Lake, New Jersey
Mountain Lake is an unincorporated community and census-designated place (CDP) located within Liberty Township in Warren County, New Jersey, United States, that was created as part of the 2010 United States Census. As of the 2010 Census, the CDP's population was 575. Geography. According to the United States Census Bureau, the CDP had a total area of 1.305 square miles (3.381 km), including 1.130 square miles (2.927 km) of land and 0.175 square miles (0.453 km) of water (13.41%).