Cumberland County is a county located in the U.S. state of New Jersey. As of the 2010 United States Census, the population was 156,898, increasing by 10,460 (+7.1%) from the 146,438 counted in the 2000 Census, retaining its position as the state's 16th-most populous county. Its county seat is Bridgeton. Cumberland County is named for Prince William, Duke of Cumberland.