Mountain Lake, New Jersey

Mountain Lake, New Jersey
Lakeside Drive West northbound in the community and the lake in the background
Mountain Lake
Location in Warren County
Mountain Lake
Location in New Jersey
Mountain Lake
Location in the United States
Coordinates: 40°51′33″N 74°59′18″W / 40.859119°N 74.98824°W / 40.859119; -74.98824
Country United States
State New Jersey
CountyWarren
TownshipLiberty
Area
  Total
1.30 sq mi (3.37 km2)
  Land1.13 sq mi (2.92 km2)
  Water0.17 sq mi (0.45 km2)  13.41%
Elevation
400 ft (122 m)
Population
 (2020)
  Total
494
  Density438.72/sq mi (169.34/km2)
Time zoneUTC−05:00 (Eastern (EST))
  Summer (DST)UTC−04:00 (EDT)
Area code908
FIPS code34-48450
GNIS feature ID02584012

Mountain Lake is an unincorporated community and census-designated place (CDP) located within Liberty Township in Warren County, in the U.S. state of New Jersey, that was created as part of the 2010 United States Census. As of the 2020 United States census, the CDP's population was 494 a decrease of 81 (−14.1%) from the 575 recorded at the 2010 census.