Marlow is a town in Cheshire County, New Hampshire, United States. The population was 742 at the 2010 census. Marlow is home to Honey Brook State Forest.
According to the United States Census Bureau, the town has a total area of 26.4 square miles (68 km), of which 26.0 sq mi (67 km) is land and 0.5 sq mi (1.3 km) is water, comprising 1.78% of the town. Marlow is drained by the Ashuelot River. The town’s highest point is in its northeast corner, at the summit of Huntley Mountain, where the elevation reaches 1,978 feet (603 m) above sea level.
Marlow is served by state routes 10, 123, and a small portion of the northern segment of Route 123A. Route 10 leads north to Newport and south to Keene, Route 123 leads east to Stoddard and west to Alstead, and Route 123A leads northwest from Route 10 into the town of Acworth.
As of the census of 2000, there were 747 people, 292 households, and 221 families residing in the town. The population density was 28.8 people per square mile (11.1/km²). There were 396 housing units at an average density of 15.3 per square mile (5.9/km²). The racial makeup of the town was 98.80% White, 0.13% Native American, and 1.07% from two or more races. Hispanic or Latino of any race were 1.07% of the population.
There were 292 households out of which 33.2% had children under the age of 18 living with them, 67.1% were married couples living together, 5.5% had a female householder with no husband present, and 24.0% were non-families. 17.1% of all households were made up of individuals and 6.8% had someone living alone who was 65 years of age or older. The average household size was 2.56 and the average family size was 2.89.
In the town, the population was spread out with 24.9% under the age of 18, 5.9% from 18 to 24, 27.6% from 25 to 44, 28.5% from 45 to 64, and 13.1% who were 65 years of age or older. The median age was 40 years. For every 100 females, there were 105.8 males. For every 100 females age 18 and over, there were 102.5 males.
The median income for a household in the town was $45,000, and the median income for a family was $47,813. Males had a median income of $29,653 versus $22,273 for females. The per capita income for the town was $18,810. About 2.7% of families and 4.1% of the population were below the poverty line, including 5.1% of those under age 18 and 4.9% of those age 65 or over.