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.
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. 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. On March 7, 1898, portions of the borough were annexed to Palisades Township. On June 13, 1898, the borough's name was changed to Dumont in honor of Dumont Clarke, the borough's first mayor.
According to the United States Census Bureau, the borough had a total area of 1.986 square miles (5.143 km2), including 1.983 square miles (5.136 km2) of land and 0.003 square miles (0.007 km2) of water (0.14%).
Municipalities bordering the borough include the Bergen County communities of Bergenfield, Cresskill, Demarest, Haworth, New Milford and Oradell.
The 2010 United States Census counted 17,479 people, 6,364 households, and 4,677.540 families in the borough. The population density was 8,814.7 per square mile (3,403.4/km2). There were 6,542 housing units at an average density of 3,299.2 per square mile (1,273.8/km2). The racial makeup of the borough was 75.91% (13,268) White, 2.55% (445) Black or African American, 0.18% (32) Native American, 14.99% (2,620) Asian, 0.02% (3) Pacific Islander, 4.06% (709) from other races, and 2.30% (402) from two or more races. Hispanic or Latino of any race were 14.76% (2,580) of the population.
The 6,364 households accounted 33.2% with children under the age of 18 living with them; 58.2% were married couples living together; 11.2% had a female householder with no husband present, and 26.5% were non-families. Of all households, 23.4% were made up of individuals, and 11.5% had someone living alone who was 65 years of age or older.