Egg Harbor City is a city in Atlantic County, New Jersey, United States. As of the 2010 United States Census, the city's population was 4,243,[8][9][10] reflecting a decline of 302 (-6.6%) from the 4,545 counted in the2000 Census, which had in turn declined by 38 (-0.8%) from the 4,583 counted in the 1990 Census.