Washington is a town in Sullivan County, New Hampshire, United States. The population was 1,123 at the 2010 census. Situated in a hilly, rocky, forested area, and with 26 lakes and ponds, Washington is a picturesque resort area. It is home to Pillsbury State Park.
According to the United States Census Bureau, the town has a total area of 47.6 square miles (123.3 km), of which 45.4 sq mi (117.6 km) is land and 2.2 sq mi (5.7 km) is water, comprising 4.62% of the town. Ashuelot Pond is in the southwest, and part of Highland Lake is in the south. Lovewell Mountain, elevation 2,496 feet (761 m) above sea level, is the highest point in town. As Edwin A. Charlton writes in New Hampshire As It Is (1855), the mountain “received its name from Captain John Lovewell, who was accustomed to ascend it for the purpose of discovering the wigwams of the Indians, and who, on one occasion, killed seven Indians near its summit.” The Washington Town Common, elevation 1,507 feet (459 m), is the highest town center in the state. (The town hall of Clarksville is located at a higher elevation—1,980 feet (600 m)—but there is no other village development there.)
As of the census of 2000, there were 895 people, 370 households, and 277 families residing in the town. The population density was 19.7 people per square mile (7.6/km²). There were 925 housing units at an average density of 20.4 per square mile (7.9/km²). The racial makeup of the town was 98.21% White, 0.34% Native American, and 1.45% from two or more races. Hispanic or Latino of any race were 1.45% of the population.
There were 370 households out of which 24.1% had children under the age of 18 living with them, 67.8% were married couples living together, 4.1% had a female householder with no husband present, and 24.9% were non-families. 19.5% of all households were made up of individuals and 9.5% had someone living alone who was 65 years of age or older. The average household size was 2.42 and the average family size was 2.73.
In the town, the age distribution of the population shows 21.9% under the age of 18, 3.5% from 18 to 24, 24.6% from 25 to 44, 32.2% from 45 to 64, and 17.9% who were 65 years of age or older. The median age was 45 years. For every 100 females, there were 104.8 males. For every 100 females age 18 and over, there were 100.9 males.
The median income for a household in the town was $43,125, and the median income for a family was $50,000. Males had a median income of $34,688 versus $26,333 for females. The per capita income for the town was $20,540. About 3.1% of families and 5.0% of the population were below the poverty line, including 8.1% of those under age 18 and 5.7% of those age 65 or over.