Troy is a town in Cheshire County, New Hampshire, United States. The population was 2,145 at the 2010 census. It is situated at the base of Mount Monadnock.
According to the United States Census Bureau, the town has a total area of 17.6 square miles (45.5 km), of which 17.4 square miles (45.1 km) is land and 0.2 square miles (0.4 km) is water, comprising 0.89% of the town. Troy is drained by the South Branch of the Ashuelot River.
The highest point in town is the south summit of Gap Mountain, at 1,900 feet (580 m) above sea level, near the eastern border. The summit of Mount Monadnock is 2 miles (3 km) northeast of the town in Jaffrey.
Troy is crossed by New Hampshire Route 12 and New Hampshire Route 124. NH 12 passes through the center of town and leads northwest 9 miles (14 km) to Keene and southeast 12 miles (19 km) to Winchendon, Massachusetts, while NH 124, crossing the northeast corner of the town, leads northwest 6 miles (10 km) to the center of Marlborough and east 6 miles (10 km) to the center of Jaffrey.
As of the census of 2010, there were 2,145 people, 867 households, and 568 families residing in the town. The population density was 123.1 people per square mile (47.5/km²). There were 932 housing units at an average density of 53.5 per square mile (20.7/km²). The racial makeup of the town was 97.0% White, 0.8% African American, 0.7% Native American, 0.9% Asian, 0.05% some other race, and 0.5% from two or more races. Hispanic or Latino of any race were 1.3% of the population. As of the 2000 census, 18.7% were of American, 13.4% French, 11.8% English, 10.6% Irish, 8.4% French Canadian, 8.2% Finnish and 7.0% Italian ancestry.
At the 2010 census there were 867 households, out of which 31.5% had children under the age of 18 living with them, 49.3% were headed by married couples living together, 11.2% had a female householder with no husband present, and 34.5% were non-families. 26.2% of all households were made up of individuals, and 7.6% were someone living alone who was 65 years of age or older. The average household size was 2.47, and the average family size was 2.96.
In the town, the population was spread out with 23.1% under the age of 18, 8.1% from 18 to 24, 28.5% from 25 to 44, 29.0% from 45 to 64, and 11.5% who were 65 years of age or older. The median age was 37.8 years. For every 100 females, there were 99.7 males. For every 100 females age 18 and over, there were 97.8 males.
For the period 2010–14, the estimated median annual income for a household in the town was $55,043, and the median income for a family was $59,750. Male full-time workers had a median income of $45,800 versus $28,359 for females. The per capita income for the town was $29,045. About 4.9% of families and 8.5% of the population were below the poverty line, including 12.6% of those under age 18 and 17.3% of those age 65 or over.