Fairfield is a township in far northwestern Essex County, New Jersey, United States. As of the 2010 United States Census, the township’s population was 7,466, reflecting an increase of 403 (+5.7%) from the 7,063 counted in the 2000 Census, which had in turn declined by 552 (-7.2%) from the 7,615 counted in the 1990 Census. Fairfield is the least densely populated town in Essex County.

As of the 2010 United States Census, there were 7,466 people, 2,645 households, and 2,103 families residing in the township. The population density was 725.1 per square mile (280.0/km²). There were 2,723 housing units at an average density of 264.5 per square mile (102.1/km²). The racial makeup of the township was 94.84% (7,081) White, 0.68% (51) Black or African American, 0.28% (21) Native American, 2.53% (189) Asian, 0.00% (0) Pacific Islander, 0.74% (55) from other races, and 0.92% (69) from two or more races. Hispanic or Latino of any race were 5.14% (384) of the population.

Source: Wikipedia