Cumberland County is a coastal county located on the Delaware Bay in the Southern Shore Region of the U.S. state of New Jersey. As of the 2020 census, the county was the state's 16th-most-populous county, with a population of 154,152, a decrease of 2,746 (−1.8%) from the 2010 census count of 156,898. Its county seat is Bridgeton. Cumberland County is named for Prince William, Duke of Cumberland. The county was formally created from portions of Salem County on January 19, 1748. The county is part of the South Jersey region of the state.

Bridgeton is a city in Cumberland County, within the U.S. state of New Jersey. It is the county seat of Cumberland County and is located on the Cohansey River near Delaware Bay in the South Jersey region of the state.