where is dumont nj
Dumont, New Jersey. Dumont is a borough in Bergen County, New Jersey, United States. As of the 2010 United States Census, the borough's population was 17,479, reflecting a decrease of 24 (-0.1%) from the 17,503 counted in the 2000 Census, which had in turn increased by 316 (+1.8%) from the 17,187 counted in the 1990 Census.