Warren is a town in Grafton County, New Hampshire, United States. The population was 904 at the 2010 census. Warren includes the village of Glencliff.
According to the United States Census Bureau, the town has a total area of 49.0 square miles (126.9 km), of which 48.5 square miles (125.6 km) is land and 0.6 square miles (1.6 km) is water, comprising 1.18% of the town. Warren is drained by the Baker River. The highest point in Warren is at the southern boundary of the town, on the north ridge of Carr Mountain, where the elevation reaches approximately 3,330 feet (1,010 m) above sea level. Set in the White Mountains, the town is surrounded by the White Mountain National Forest.
Warren is crossed by New Hampshire Route 25 and New Hampshire Route 118.
As of the census of 2010, there were 904 people, 381 households, and 238 families residing in the town. The population density in 2010 was 18.6 people per square mile (7.2/km²). There were 612 housing units at an average density of 12.6 per square mile (4.8/km²). The racial makeup of the town was 96.57% White, 0.22% African American, 0.33% Native American, 0.11% Asian, 0.22% some other race, and 2.43% from two or more races. Hispanic or Latino of any race were 0.55% of the population.
There were 381 households, out of which 27.8% had children under the age of 18 living with them, 52.2% were headed by married couples living together, 8.7% had a female householder with no husband present, and 37.5% were non-families. 28.1% of all households were made up of individuals, and 9.9% were someone living alone who was 65 years of age or older. The average household size was 2.37, and the average family size was 2.92.
In the town, the population was spread out with 20.7% under the age of 18, 6.2% from 18 to 24, 22.8% from 25 to 44, 33.2% from 45 to 64, and 17.1% who were 65 years of age or older. The median age was 45.2 years. For every 100 females, there were 105.9 males. For every 100 females age 18 and over, there were 103.7 males.
The median annual income calculated between 2010-2014 by the Census’ American Community Survey for a household in the town was $45,000, and the median income for a family was $52,857. Male full-time workers had a median income of $41,364 versus $36,250 for females. The per capita income for the town was $24,313. About 17.4% of families and 19.3% of the population were below the poverty line, including 32.1% of those under age 18 and 4.7% of those age 65 or over.