Edgewater is a borough located along the Hudson River in Bergen County, New Jersey, United States. As of the 2010 United States Census, the borough had a population of 11,513, reflecting an increase of 3,836 (+50.0%) from the 7,677 counted in the 2000 Census, which had in turn increased by 2,676 (+53.5%) from the 5,001 counted in the 1990 Census.