Atkinson is a town in Rockingham County, New Hampshire, United States. The population was 6,751 at the 2010 census.
According to the United States Census Bureau, the town has a total area of 11.3 square miles (29.3 km), of which 11.2 square miles (28.9 km) are land and 0.2 square miles (0.4 km) are water, comprising 1.42% of the town. The highest point in Atkinson is Hog Hill, at 430 feet (130 m) above sea level. Atkinson lies fully within the Merrimack River watershed.
In 2011 the New Hampshire Scenic and Cultural Byways program named 3.74 miles of Main Street the “Stage Coach Byway”.
As of the census of 2000, there were 6,178 people, 2,317 households, and 1,777 families residing in the town. The population density was 555.2 people per square mile (214.3/km²). There were 2,431 housing units at an average density of 218.5 per square mile (84.3/km²). The racial makeup of the town was 97.62% White, 0.26% African American, 0.06% Native American, 1.18% Asian, 0.21% from other races, and 0.66% from two or more races. Hispanic or Latino of any race were 0.70% of the population.
There were 2,317 households out of which 32.5% had children under the age of 18 living with them, 68.8% were married couples living together, 5.7% had a female householder with no husband present, and 23.3% were non-families. 19.0% of all households were made up of individuals and 6.4% had someone living alone who was 65 years of age or older. The average household size was 2.66 and the average family size was 3.08.
In the town, the population was spread out with 24.5% under the age of 18, 5.0% from 18 to 24, 28.4% from 25 to 44, 30.7% from 45 to 64, and 11.4% who were 65 years of age or older. The median age was 41 years. For every 100 females, there were 94.9 males. For every 100 females age 18 and over, there were 96.1 males.
The median income for a household in the town was $69,729, and the median income for a family was $77,631. Males had a median income of $53,229 versus $34,760 for females. The per capita income for the town was $30,412. About 2.3% of families and 3.3% of the population were below the poverty line, including 4.5% of those under age 18 and 2.2% of those age 65 or over.