South Valley is a town in Cattaraugus County, New York, United States. The population was 264 at the 2010 census. The name is from the town’s geographical attributes.
According to the United States Census Bureau, the town has a total area of 37.1 square miles (96.1 km), of which 36.8 square miles (95.4 km) is land and 0.23 square miles (0.6 km), or 0.67%, is water.
The south town line is the border of Pennsylvania and the west town line is the border of Chautauqua County, New York.
The Allegheny Reservoir cuts through the town.
The South Valley State Forest occupies much of the town’s area.
As of the census of 2000, there were 302 people, 126 households, and 89 families residing in the town. The population density was 8.2 people per square mile (3.2/km²). There were 320 housing units at an average density of 8.7 per square mile (3.3/km²). The racial makeup of the town was 98.01% White, 0.33% African American, 1.32% Native American and 0.33% Asian.
There were 126 households out of which 22.2% had children under the age of 18 living with them, 58.7% were married couples living together, 5.6% had a female householder with no husband present, and 28.6% were non-families. 25.4% of all households were made up of individuals and 10.3% had someone living alone who was 65 years of age or older. The average household size was 2.40 and the average family size was 2.83.
In the town, the population was spread out with 20.5% under the age of 18, 4.3% from 18 to 24, 25.5% from 25 to 44, 34.8% from 45 to 64, and 14.9% who were 65 years of age or older. The median age was 44 years. For every 100 females, there were 125.4 males. For every 100 females age 18 and over, there were 122.2 males.
The median income for a household in the town was $38,750, and the median income for a family was $47,188. Males had a median income of $32,188 versus $22,188 for females. The per capita income for the town was $20,541. About 3.8% of families and 6.4% of the population were below the poverty line, including 15.0% of those under the age of eighteen and 10.5% of those sixty five or over.