Mont Vernon is a town in Hillsborough County, New Hampshire, United States. The population was 2,409 at the 2010 census.
According to the United States Census Bureau, the town has a total area of 16.7 square miles (43 km), of which 16.6 square miles (43 km) is land and 0.1 square miles (0.26 km) is water, comprising 0.48% of the town. Mont Vernon is drained by Beaver Brook and Caesar’s Brook. The town’s highest point is on its northern border, at 1,015 feet (309 m) above sea level, near the summit of Storey Hill.
As of the census of 2000, there were 2,034 people, 693 households, and 575 families residing in the town. The population density was 122.4 people per square mile (47.3/km²). There were 720 housing units at an average density of 43.3 per square mile (16.7/km²). The racial makeup of the town was 98.57% White, 0.15% African American, 0.15% Native American, 0.25% Asian, 0.10% from other races, and 0.79% from two or more races. Hispanic or Latino of any race were 0.54% of the population.
There were 693 households out of which 43.3% had children under the age of 18 living with them, 73.7% were married couples living together, 5.6% had a female householder with no husband present, and 16.9% were non-families. 12.1% of all households were made up of individuals and 6.1% had someone living alone who was 65 years of age or older. The average household size was 2.90 and the average family size was 3.17.
In the town, the population was spread out with 29.7% under the age of 18, 4.4% from 18 to 24, 30.8% from 25 to 44, 26.0% from 45 to 64, and 9.1% who were 65 years of age or older. The median age was 38 years. For every 100 females, there were 104.8 males. For every 100 females age 18 and over, there were 103.1 males.
The median income for a household in the town was $71,250, and the median income for a family was $77,869. Males had a median income of $50,353 versus $32,500 for females. The per capita income for the town was $30,772. About 1.0% of families and 2.0% of the population were below the poverty line, including 2.3% of those under age 18 and 5.7% of those age 65 or over.