Eaton is a town in Carroll County, New Hampshire, United States. The population was 393 at the 2010 census. Eaton includes the villages of Eaton Center and Snowville.
According to the United States Census Bureau, the town has a total area of 25.6 square miles (66 km), of which 24.3 square miles (63 km) is land and 1.3 square miles (3.4 km) is water, comprising 5.06% of the town. Conway Lake is on the northern boundary, and Crystal Lake is in the center. Eaton lies fully within the Saco River watershed. The highest point in town is 1,730 feet (530 m) above sea level on its southern boundary, just north of the 1,806-foot (550 m) summit of Cragged Mountain. Eaton is bounded on the east by the Maine state line.
As of the census of 2000, there were 375 people, 157 households, and 111 families residing in the town. The population density was 15.4 people per square mile (5.9/km²). There were 239 housing units at an average density of 9.8 per square mile (3.8/km²). The racial makeup of the town was 98.67% White, 0.27% African American, 0.27% Asian, and 0.80% from two or more races.
There were 157 households out of which 29.9% had children under the age of 18 living with them, 61.1% were married couples living together, 7.6% had a female householder with no husband present, and 28.7% were non-families. 23.6% of all households were made up of individuals and 7.0% had someone living alone who was 65 years of age or older. The average household size was 2.38 and the average family size was 2.85.
In the town, the population was spread out with 23.5% under the age of 18, 4.0% from 18 to 24, 21.6% from 25 to 44, 38.9% from 45 to 64, and 12.0% who were 65 years of age or older. The median age was 45 years. For every 100 females, there were 96.3 males. For every 100 females age 18 and over, there were 92.6 males.
The median income for a household in the town was $46,429, and the median income for a family was $53,750. Males had a median income of $31,458 versus $23,750 for females. The per capita income for the town was $21,122. About 3.6% of families and 7.2% of the population were below the poverty line, including 7.6% of those under age 18 and 15.9% of those age 65 or over.