what county is berlin nj in
Berlin, New Jersey. Berlin is a borough in Camden County, New Jersey, United States. As of the 2010 United States Census, the borough's population was 7,588, reflecting an increase of 1,439 (+23.4%) from the 6,149 counted in the 2000 Census, which had in turn increased by 477 (+8.4%) from the 5,672 counted in the 1990 Census.