Marlborough is a town in Cheshire County, New Hampshire, United States. The population was 2,063 at the 2010 census. The town is home to the Kensan-Devan Wildlife Sanctuary at Meetinghouse Pond.
According to the United States Census Bureau, the town has a total area of 20.6 square miles (53.4 km), of which 20.4 sq mi (52.8 km) is land and 0.2 sq mi (0.5 km) is water, comprising 1.16% of the town. Marlborough is drained by Minnewawa Brook. The town’s highest point is near its southeast corner, on the side of Bigelow Hill, where the elevation reaches 1,516 feet (462 m) above sea level.
Marlborough is served by state routes 101 and 124.
As of the census of 2010, there were 2,063 people, 866 households, and 565 families residing in the town. There were 946 housing units, of which 80, or 8.5%, were vacant. The racial makeup of the town was 97.0% white, 0.4% African American, 0.05% Native American, 0.9% Asian, 0.0% Native Hawaiian or Pacific Islander, 0.2% some other race, and 1.4% from two or more races. 1.4% of the population were Hispanic or Latino of any race.
Of the 866 households, 26.8% had children under the age of 18 living with them, 50.3% were headed by married couples living together, 10.2% had a female householder with no husband present, and 34.8% were non-families. 24.4% of all households were made up of individuals, and 9.6% were someone living alone who was 65 years of age or older. The average household size was 2.38, and the average family size was 2.79.
In the town, 19.8% of the population were under the age of 18, 6.9% were from 18 to 24, 25.0% from 25 to 44, 31.6% from 45 to 64, and 16.6% were 65 years of age or older. The median age was 43.9 years. For every 100 females, there were 95.4 males. For every 100 females age 18 and over, there were 94.2 males.
For the period 2011-2015, the estimated median annual income for a household was $54,491, and the median income for a family was $64,844. Male full-time workers had a median income of $50,069 versus $37,667 for females. The per capita income for the town was $30,219. 8.5% of the population and 7.3% of families were below the poverty line. 24.2% of the population under the age of 18 and 2.1% of those 65 or older were living in poverty.