Piermont is a town in Grafton County, New Hampshire, United States. The population of Piermont was 790 at the 2010 census. It is home to Camp Walt Whitman and Kingswood Camp for Boys.
According to the United States Census Bureau, the town has a total area of 39.8 square miles (103 km), of which 38.5 sq mi (100 km) is land and 1.3 sq mi (3.4 km) is water, comprising 3.34% of the town. It is drained by Indian Pond Brook, Eastman Brook and Bean Brook, tributaries of the Connecticut River, which forms the western boundary. Piermont’s highest point is the summit of Piermont Mountain, at 2,717 feet (828 m) above sea level.
Piermont is bordered by the towns of Haverhill to the north, Warren to the east, Wentworth to the southeast, Orford to the south, and Bradford, Vermont, across the Connecticut River to the west. Piermont is 27 miles (43 km) north of Lebanon and 72 miles (116 km) southwest of Berlin, New Hampshire.
Piermont is home to Lake Tarleton, which takes its name from its erstwhile owner, Colonel William Tarleton, who was a delegate to the Constitutional Convention of 1791. Lake Armington feeds Lake Tarleton from the south.
As of the census of 2010, there were 790 people, 334 households, and 228 families residing in the town. The population density was 19.8 people per square mile (7.6/km²). There were 474 housing units at an average density of 11.9 per square mile (4.6/km²). The racial makeup of the town was 97.2% White, 0.1% African American, 0.9% Asian, 0.4% Native American and Alaskan Native, and 1.4% from two or more races. Hispanic or Latino of any race were 0.8% of the population.
There are 334 households in Piermont, out of which 24.6% have children under the age of 18 living with them, 57.8% were married couples living together, 7.5% had a female householder with no husband present, and 31.7% were non-families. 24.6% of all households were made up of individuals and 9.6% had someone living alone who was 65 years of age or older. The average household size was 2.37, and the average family size was 2.83.
In the town, the population was spread out with 19.0% under the age of 18, 5.1% between the ages of 18 and 24, 22.8% between 25 and 44, 36.3% between 45 and 64, and 16.8% who were 65 years of age or older. The median age was 46.8 years. The town is 49.4% male and 50.6% female.
For the period 2010–14, the estimated median income for a household in the town was $72,841, and the median income for a family was $91,875. Male full-time workers had a median income of $49,688 versus $41,250 for females. The per capita income for the town was $38,089. About 3.4% of families and 6.8% of the total population were below the poverty line, including 6.3% of those under age 18 and 6.0% of those age 65 or over.