Mount Arlington, New Jersey

Mount Arlington, New Jersey
"Castle on the Lake" in Mount Arlington
Location of Mount Arlington in Morris County highlighted in red (right). Inset map: Location of Morris County in New Jersey highlighted in orange (left).
Census Bureau map of Mount Arlington, New Jersey
Mount Arlington
Location in Morris County
Mount Arlington
Location in New Jersey
Mount Arlington
Location in the United States
Coordinates: 40°55′15″N 74°38′27″W / 40.920751°N 74.640791°W / 40.920751; -74.640791
Country United States
State New Jersey
County Morris
IncorporatedNovember 3, 1890
Named afterHenry Bennet, 1st Earl of Arlington
Government
  TypeBorough
  BodyBorough Council
  MayorMichael Stanzilis (R; term ends December 31, 2026)
  AdministratorCarolyn Rinaldi
  Municipal clerkAshley Todd
Area
  Total
2.80 sq mi (7.25 km2)
  Land2.14 sq mi (5.55 km2)
  Water0.66 sq mi (1.70 km2)  23.30%
  Rank356th of 565 in state
28th of 39 in county
Elevation
1,079 ft (329 m)
Population
 (2020)
  Total
5,909
  Estimate 
(2023)
5,931
  Rank350th of 565 in state
30th of 39 in county
  Density2,761.2/sq mi (1,066.1/km2)
   Rank234th of 565 in state
11th of 39 in county
Time zoneUTC−05:00 (Eastern (EST))
  Summer (DST)UTC−04:00 (Eastern (EDT))
ZIP Code
07856
Area code(s)973
FIPS code3402748690
GNIS feature ID0885312
Websitewww.mountarlingtonnj.org

Mount Arlington is a borough in western Morris County, in the U.S. state of New Jersey. As of the 2020 United States census, the borough's population was 5,909, an increase of 859 (+17.0%) from the 2010 census count of 5,050, which in turn reflected an increase of 387 (+8.3%) from the 4,663 counted in the 2000 census.

The borough is located on the southeast shore of Lake Hopatcong, New Jersey's largest lake and a major recreational resource. Mount Arlington is home to the Lake Hopatcong Yacht Club.