Gloucester County, New Jersey
Gloucester County ( GLOST-ər) is a county in the U.S. state of New Jersey. As of the 2020 census, the county was the state's 14th-most populous county with a population of 302,294, its highest decennial count ever and an increase of 14,006 (+4.9%) from the 288,288 counted in the 2010 census, which in turn represented an increase of 33,615 (+13.2%) from the 2000 census population of 254,673. The United States Census Bureau's Population Estimates Program estimated a 2025 population of 312,638, an increase of 10,344 (+3.4%) from the 2020 decennial census. Its county seat is Woodbury. The county is part of the South Jersey region of the state.
The county's largest municipality by population in 2020 was Washington Township, with a population of 48,677, while the largest municipality by area was Franklin Township, which covered 56.39 square miles (146.0 km2).
The county is part of the Philadelphia metropolitan area, which is formally designated as the Philadelphia–Camden–Wilmington, PA–NJ–DE–MD Metropolitan Statistical Area.
Gloucester County borders Philadelphia, the nation's sixth-most populous city, to its northwest across the Delaware River. Atlantic City is 52 miles (84 km) to the county's southeast. Gloucester County and adjacent Salem County, also in South Jersey, have become an East Coast epicenter for logistics and warehouse construction.