Belleville is a township in Essex County, in the U.S. state of New Jersey. As of the 2020 United States Census, the township's population was 38,222, reflecting an increase of 6.4% from the 2010 Census population of 35,926, an increase that follows a decline of 2 from the 35,928 counted in the 2000 Census.
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Coordinates 40°47'37.362" N -74°9'0.518" E
