Gloucester County (//) is a county located in the U.S. state of New Jersey. As of the 2020 United States Census, the county’s population was 302,294, as the state’s 14th-most populous county, and representing an increase of 14,006 (4.9%) from the 288,288 enumerated in the 2010 U.S. Census, in turn an increase of 33,615 (+13.2%) from the 254,673 counted in the 2000 U.S. Census.
Gloucester County is located south of Philadelphia and northwest of Atlantic City. It is part of the Camden, New Jersey Metropolitan Division of the Philadelphia-Camden-WilmingtonMetropolitan Statistical Area as well as the Delaware Valley Combined Statistical Area.
According to the 2010 Census, the county had a total area of 337.18 square miles (873.3 km2), including 322.00 square miles (834.0 km2) of land (95.5%) and 15.17 square miles (39.3 km2) of water (4.5%).
Gloucester County is largely composed of low-lying rivers and coastal plains. The highest elevation in the county is a slight rise along County Route 654 southeast of Cross Keys that reaches approximately 180 feet (55 m) above sea level; the lowest point is at sea level on the Delaware River.
- Philadelphia County, Pennsylvania – north
- Camden County – northeast
- Atlantic County – southeast
- Cumberland County – south
- Salem County – southwest
- New Castle County, Delaware – west
- Delaware County, Pennsylvania – northwest
In recent years, average temperatures in the county seat of Woodbury have ranged from a low of 26 °F (−3 °C) in January to a high of 87 °F (31 °C) in July, although a record low of −11 °F (−24 °C) was recorded in February 1934 and a record high of 106 °F (41 °C) was recorded in August 1918. Average monthly precipitation ranged from 2.75 inches (70 mm) in February to 4.35 inches (110 mm) in July. The county has a humid subtropical climate (Cfa). Average monthly temperatures in Newfield range from 33.0 °F in January to 76.6 °F in July.