Williamstown, New Jersey

Williamstown, New Jersey
Ireland Hofer House in Williamstown, New Jersey
Map of Williamstown highlighted within Gloucester County. Right: Location of Gloucester County in New Jersey.
Williamstown
Location in Gloucester County
Williamstown
Location in New Jersey
Williamstown
Location in the United States
Coordinates: 39°41′03″N 74°58′08″W / 39.684113°N 74.968819°W / 39.684113; -74.968819
Country United States
State New Jersey
CountyGloucester
TownshipMonroe
Established1737 as Squankum
1842 as Williamstown
Area
  Total
7.42 sq mi (19.23 km2)
  Land7.42 sq mi (19.22 km2)
  Water0.00 sq mi (0.01 km2)  0.05%
Elevation
141 ft (43 m)
Population
 (2020)
  Total
15,082
  Density2,032.34/sq mi (784.67/km2)
Time zoneUTC−05:00 (Eastern (EST))
  Summer (DST)UTC−04:00 (Eastern (EDT))
ZIP Code
08094
Area code856
FIPS code34-81380
GNIS feature ID02390518

Williamstown is an unincorporated community and census-designated place (CDP) located in Monroe Township in Gloucester County, in the U.S. state of New Jersey. As of the 2010 U.S. census, Williamstown's population was 15,567.