Atlantic County (N.J.)

Atlantic County is a county in the U.S. state of New Jersey. As of the 2020 census, the county was the state's 15th-most-populous county, with a population of 274,534, a drop of 15 from the 2010 census count of 274,549. The United States Census Bureau's Population Estimates Program estimated a 2025 population of 278,657, an increase of 4,123 (+1.5%) from the 2020 decennial census. Its county seat is the Mays Landing section of Hamilton Township. The county is part of the Jersey Shore region of the state. The most populous place in Atlantic County is Egg Harbor Township, with 47,842 residents at the time of the 2020 census; Galloway Township, covered 115.21 square miles (298.4 km2), the largest total area of any municipality, though Hamilton Township has the largest land area, covering 111.13 square miles (287.8 km2). Atlantic County forms the Atlantic City–Hammonton metropolitan statistical area, which is part of the Philadelphia metropolitan area (which is formally designated as the Philadelphia–Camden–Wilmington, PA–NJ–DE–MD Metropolitan Statistical Area).