According to the United States Census Bureau, the town has a total area of 39.3 square miles (101.8 km2), of which 39.3 square miles (101.7 km2) is land and 0.04 square mile (0.1 km2) (0.08%) is water.
As of the census of 2010, there were 2029 people, 757 households, and 574 families residing in the town. The population density was 51.6 people per square mile (20.0/km2). There were 787 housing units at an average density of 20.0 per square mile (7.7/km2). The racial makeup of the town was 97.2% White, 0.3% African American, 0.4% Native American, 0.3% Asian, 0.2% from other races, and 1.5% from two or more races. Hispanic or Latino of any race were 0.8% of the population.
There were 757 households out of which 37.3% had children under the age of 18 living with them, 8.1% had a female householder with no husband present, and 24.2% were non-families. The average household size was 2.68 and the average family size was 3.00.
In the town the population was spread out with 26.6% under the age of 20, 3.9% from 20 to 24, 26.6% from 25 to 44, 33.9% from 45 to 64, and 8.8% who were 65 years of age or older. The median age was 41.5 years. For every 100 females there were 101.2 males. For every 100 females age 18 and over, there were 98 males.
The median income for a household in the town was $81,574, and the median income for a family was $84,423. Males had a median income of $55,417 versus $50,179 for females. The per capita income for the town was $34,502. About 1.0% of families and 1.7% of the population were below the poverty line, including 2.4% of those under age 18 and 3.7% of those age 65 or over.
2010 U.S. Census Data – Westford, Vermont