Webster is a town in Merrimack County, New Hampshire, United States. The population was 1,872 at the 2010 census.
According to the United States Census Bureau, the town has a total area of 28.6 square miles (74 km), of which 27.9 sq mi (72 km) is land and 0.7 sq mi (1.8 km) is water, comprising 2.31% of the town. The highest point in Webster is 870 feet (270 m) above sea level, on an unnamed summit near the center of town that overlooks the eastern shore of Lake Winnepocket.
As of the census of 2000, there were 1,579 people, 581 households, and 464 families residing in the town. The population density was 56.6 people per square mile (21.9/km²). There were 672 housing units at an average density of 24.1 per square mile (9.3/km²). The racial makeup of the town was 98.86% White, 0.06% African American, 0.06% Native American, 0.38% Asian, 0.06% from other races, and 0.57% from two or more races. Hispanic or Latino of any race were 0.13% of the population.
There were 581 households out of which 34.9% had children under the age of 18 living with them, 68.3% were married couples living together, 7.4% had a female householder with no husband present, and 20.1% were non-families. 14.5% of all households were made up of individuals and 4.6% had someone living alone who was 65 years of age or older. The average household size was 2.71 and the average family size was 2.99.
In the town, the population was spread out with 25.8% under the age of 18, 5.3% from 18 to 24, 31.7% from 25 to 44, 27.9% from 45 to 64, and 9.2% who were 65 years of age or older. The median age was 39 years. For every 100 females, there were 94.0 males. For every 100 females age 18 and over, there were 93.2 males.
The median income for a household in the town was $54,052, and the median income for a family was $57,396. Males had a median income of $35,449 versus $24,250 for females. The per capita income for the town was $20,852. About 3.6% of families and 5.0% of the population were below the poverty line, including 5.0% of those under age 18 and 5.4% of those age 65 or over.