Newton is a town in Rockingham County, New Hampshire, United States. The population was 4,603 at the 2010 census.
According to the United States Census Bureau, the town has a total area of 10.1 square miles (26.2 km), of which 9.9 sq mi (25.6 km) is land and 0.2 sq mi (0.5 km) is water, comprising 1.59% of the town. The highest point in Newton is the summit of Brandy Brow Hill, at 289 feet (88 m) above sea level, located directly upon the southern corner of the town.
Villages or place names in the town include Newton, Newton Junction, Rowes Corner, Sargent Corners, and Crane Crossing.
As of the census of 2000, there were 4,289 people, 1,518 households, and 1,170 families residing in the town. The population density was 433.0 people per square mile (167.1/km²). There were 1,552 housing units at an average density of 156.7 per square mile (60.5/km²). The racial makeup of the town was 97.90% White, 0.68% African American, 0.16% Native American, 0.07% Asian, 0.02% Pacific Islander, 0.40% from other races, and 0.77% from two or more races. Hispanic or Latino of any race were 1.31% of the population.
There were 1,518 households out of which 40.7% had children under the age of 18 living with them, 66.1% were married couples living together, 7.2% had a female householder with no husband present, and 22.9% were non-families. 15.8% of all households were made up of individuals and 5.6% had someone living alone who was 65 years of age or older. The average household size was 2.83 and the average family size was 3.19.
In the town, the population was spread out with 28.8% under the age of 18, 5.8% from 18 to 24, 36.2% from 25 to 44, 21.6% from 45 to 64, and 7.6% who were 65 years of age or older. The median age was 35 years. For every 100 females, there were 99.1 males. For every 100 females age 18 and over, there were 98.1 males.
The median income for a household in the town was $60,972, and the median income for a family was $62,271. Males had a median income of $43,510 versus $32,471 for females. The per capita income for the town was $22,910. About 2.7% of families and 4.0% of the population were below the poverty line, including 3.4% of those under age 18 and 16.0% of those age 65 or over.