As of the 2000 United States census there were 35,928 people, 13,731 households, and 9,089 families residing in the township. The population density was . There were 14,144 housing units at an average density of . The racial makeup of the township was 69.44% White, 5.36% African American, 0.17% Native American, 11.31% Asian, 0.07% Pacific Islander, 9.83% from other races, and 3.82% from two or more races. Hispanic or Latino of any race were 23.68% of the population.Census 2000 Profiles of Demographic/Social/Economic/Housing Characteristics for Belleville township, Essex County, New Jersey , United States Census Bureau. Accessed March 3, 2012.DP-1: Profile of General Demographic Characteristics: 2000 – Census 2000 Summary File 1 (SF 1) 100-Percent Data for Belleville township, Essex County, New Jersey, United States Census Bureau. Accessed July 11, 2012.
