Bergenfield is a borough in Bergen County of New Jersey, United States. As of the 2010 United States Census, the borough's population was 26,764, reflecting an increase of 517 from the 26,247 counted in the 2000 Census, which had in turn increased by 1,789 from the 24,458 counted in the 1990 Census.Bergenfield was formed on the basis of a referendum held on June 25, 1894, from portions of Englewood Township and Palisades Township. The borough was formed during the "Boroughitis" phenomenon then sweeping through Bergen County, in which 26 boroughs were formed in the county in 1894 alone. The borough was named for its location in Bergen County.New Jersey Monthly magazine ranked Bergenfield as its 211th best place to live in its 2010 rankings of the "Best Places To Live" in New Jersey. The magazine ranked Bergenfield as its 231st best place to live in its 2008 rankings of the "Best Places To Live".