Dumont is a borough in Bergen County, in the U.S. state of New Jersey. As of the 2020 United States census, the borough's population was 17,863, an increase of 384 from the 2010 census count of 17,479, which in turn reflected a decrease of 24 from the 17,503 counted in the 2000 census. The borough was originally formed on July 20, 1891, as the Borough of Schraalenburgh from portions of Harrington Township and Palisades Township, based on the results of a referendum held the previous day.