Sugar Hill is a town in Grafton County, New Hampshire, United States. The population was 563 at the 2010 census. The town overlooks the White Mountain National Forest, with views of the Presidential, Franconia, Kinsman and Dalton ranges. Sugar Hill was incorporated as a town in 1962, making it the most recent in New Hampshire to be split from another town.
According to the United States Census Bureau, the town has a total area of 17.2 square miles (44.5 km), of which 17.0 square miles (44.0 km) is land and 0.2 square miles (0.5 km) is water, comprising 1.06% of the town. Sugar Hill is drained by the Gale River and other tributaries of the Ammonoosuc River. The town is crossed by New Hampshire Route 117. Interstate 93 and New Hampshire Route 18 pass through the northeast corner of the town. The highest point in town is the summit of Bronson Hill, at 2,078 feet (633 m) above sea level.
As of the census of 2000, there were 563 people, 258 households, and 164 families residing in the town. The population density was 32.9 people per square mile (12.7/km²). There were 385 housing units at an average density of 22.5 per square mile (8.7/km²). The racial makeup of the town was 98.40% White, 1.24% Asian, and 0.36% from two or more races. Hispanic or Latino of any race were 0.18% of the population.
There were 258 households out of which 22.1% had children under the age of 18 living with them, 56.2% were married couples living together, 4.7% had a female householder with no husband present, and 36.4% were non-families. 29.8% of all households were made up of individuals and 12.0% had someone living alone who was 65 years of age or older. The average household size was 2.18 and the average family size was 2.72.
In the town, the population was spread out with 18.1% under the age of 18, 5.3% from 18 to 24, 24.2% from 25 to 44, 33.7% from 45 to 64, and 18.7% who were 65 years of age or older. The median age was 46 years. For every 100 females, there were 98.9 males. For every 100 females age 18 and over, there were 101.3 males.
The median income for a household in the town was $49,219, and the median income for a family was $60,288. Males had a median income of $36,667 versus $25,714 for females. The per capita income for the town was $29,743. About 4.3% of families and 5.3% of the population were below the poverty line, including none of those under age 18 and 10.6% of those age 65 or over.