Franklinville is a town in Cattaraugus County, New York, United States. The population was 2,990 at the 2010 census.
Franklinville is located at 42°18′20″N 078°30′00″W / 42.30556°N 78.50000°W / 42.30556; -78.50000 (42.3054311, -78.4998726) and its elevation is 1,991 feet (607 m).
According to the 2010 United States Census, the town has a total area of 51.985 square miles (134.64 km), of which 51.812 square miles (134.19 km) is land and 0.173 square miles (0.45 km) is water.
New York State Route 16 and New York State Route 98 are important (basically north-south) highways in the town. New York State Route 242 cuts across the northwest corner of the town.
Ischua Creek flows southward through the town, having formed the Ischua Valley.
As of the census of 2000, there were 3,128 people, 1,205 households, and 848 families residing in the town. The population density was 60.4 people per square mile (23.3/km²). There were 1,569 housing units at an average density of 30.3 per square mile (11.7/km²). The racial makeup of the town was 98.43% White, 0.10% Black or African American, 0.51% Native American, 0.22% Asian, 0.03% from other races, and 0.70% from two or more races. Hispanic or Latino of any race were 0.48% of the population.
There were 1,205 households out of which 34.7% had children under the age of 18 living with them, 52.9% were married couples living together, 12.6% had a female householder with no husband present, and 29.6% were non-families. 24.2% of all households were made up of individuals and 12.4% had someone living alone who was 65 years of age or older. The average household size was 2.58 and the average family size was 3.04.
In the town, the population was spread out with 28.5% under the age of 18, 7.3% from 18 to 24, 26.3% from 25 to 44, 23.4% from 45 to 64, and 14.5% who were 65 years of age or older. The median age was 37 years. For every 100 females, there were 94.6 males. For every 100 females age 18 and over, there were 91.1 males.
The median income for a household in the town was $31,992, and the median income for a family was $37,250. Males had a median income of $28,684 versus $21,618 for females. The per capita income for the town was $14,035. About 9.8% of families and 13.6% of the population were below the poverty line, including 18.9% of those under age 18 and 6.8% of those age 65 or over.
Franklinville has had an unusually stable population compared to other towns in the area; it has consistently hovered around approximately 3,000 residents since 1920.