Alexandria is a town in Grafton County, New Hampshire, United States. The population was 1,613 at the 2010 census. Newfound Lake is in the northeast corner, with Wellington State Park on the western shore. The town is home to Welton Falls State Forest. Cardigan Mountain State Park, with Mount Cardigan, is in the west. Another attraction is Mowglis Mountain, named for Rudyard Kipling’s Jungle Book hero.
According to the United States Census Bureau, the town has a total area of 43.1 square miles (112 km), of which 43.0 sq mi (111 km) is land and 0.1 sq mi (0.26 km) is water, comprising 0.23% of the town. Alexandria is drained by the Fowler River. Mount Cardigan, elevation 3,121 feet (951 m), is on the western boundary of the town. The summit is in the town of Orange, while the highest point in Alexandria is on the Firescrew ridge to the north, where the elevation reaches 3,040 ft (930 m). Alexandria lies fully within the Merrimack River watershed.
As of the census of 2000, there were 1,329 people, 504 households, and 386 families residing in the town. The population density was 30.9 people per square mile (11.9/km²). There were 783 housing units at an average density of 18.2 per square mile (7.0/km²). The racial makeup of the town was 97.82% White, 0.08% African American, 0.30% Native American, 0.38% Asian, and 1.43% from two or more races. Hispanic or Latino of any race were 0.23% of the population.
There were 504 households out of which 31.5% had children under the age of 18 living with them, 64.7% were married couples living together, 7.5% had a female householder with no husband present, and 23.4% were non-families. 16.9% of all households were made up of individuals and 6.0% had someone living alone who was 65 years of age or older. The average household size was 2.64 and the average family size was 2.94.
In the town, the population was spread out with 25.0% under the age of 18, 4.7% from 18 to 24, 31.0% from 25 to 44, 28.0% from 45 to 64, and 11.3% who were 65 years of age or older. The median age was 40 years. For every 100 females, there were 99.3 males. For every 100 females age 18 and over, there were 99.8 males.
The median income for a household in the town was $42,667, and the median income for a family was $45,938. Males had a median income of $31,367 versus $25,163 for females. The per capita income for the town was $19,323. About 4.7% of families and 6.3% of the population were below the poverty line, including 9.0% of those under age 18 and none of those age 65 or over.