Camden is a city in Camden County, New Jersey, United States. It is the county seat, located directly across the Delaware River from Philadelphia. As of the 2010 United States Census, the city had a total population of 77,344, representing a decline of 2,560 (3.2%) from the 79,904 residents enumerated during the 2000 Census, which had in turn declined by 7,588 (8.7%) from the 87,492 counted in the 1990 Census.