Camden County is a county located in the U.S. state of New Jersey. Its county seat is Camden. As of the 2016 Census estimate, the county's population was 510,150, making it the state's 8th-largest county, representing a 0.7% decrease from the 513,657 enumerated at the 2010 Census, in turn having increased by 4,725 from the 508,932 counted in the 2000 Census.