what county is northfield city board of education located in
Northfield, New Jersey. Northfield is a city in Atlantic County, New Jersey, United States. As of the 2010 United States Census, the city's population was 8,624, reflecting an increase of 899 (+11.6%) from the 7,725 counted in the 2000 Census, which had in turn increased by 420 (+5.7%) from the 7,305 counted in the 1990 Census.