Portville is a town in Cattaraugus County, New York, United States. The population was 3,730 at the 2010 census. The name is derived from the town’s early role in shipping lumber and other items down the Allegheny River.
According to the United States Census Bureau, the town has a total area of 36.0 square miles (93.3 km), of which 35.6 square miles (92.2 km) is land and 0.46 square miles (1.2 km), or 1.24%, is water.
Portville is located in the southeast corner of the county. Its eastern town line is the border of Allegany County, New York, and its southern town line is the McKean County, Pennsylvania, border.
The Allegheny River flows through the south part of the town. Oswayo Creek joins the Allegheny south of Portville village, and Dodge Creek joins the river in the village.
New York State Route 305 (running north-south) and New York State Route 417 (running east-west) pass through the town.
As of the census of 2000, there were 3,952 people, 1,545 households, and 1,121 families residing in the town. The population density was 110.9 people per square mile (42.8/km). There were 1,693 housing units at an average density of 47.5 per square mile (18.3/km). The racial makeup of the town was 97.93% White, 0.76% Black or African American, 0.15% Native American, 0.23% Asian, 0.03% Pacific Islander, 0.20% from other races, and 0.71% from two or more races. Hispanic or Latino of any race were 0.68% of the population.
There were 1,545 households out of which 34.1% had children under the age of 18 living with them, 57.5% were married couples living together, 11.2% had a female householder with no husband present, and 27.4% were non-families. 23.6% of all households were made up of individuals and 11.8% 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 3.01.
In the town, the population was spread out with 26.3% under the age of 18, 7.0% from 18 to 24, 26.4% from 25 to 44, 24.9% from 45 to 64, and 15.4% who were 65 years of age or older. The median age was 39 years. For every 100 females, there were 93.8 males. For every 100 females age 18 and over, there were 89.7 males.
The median income for a household in the town was $37,284, and the median income for a family was $41,270. Males had a median income of $34,279 versus $23,494 for females. The per capita income for the town was $18,043. About 8.7% of families and 10.4% of the population were below the poverty line, including 17.0% of those under age 18 and 6.5% of those age 65 or over.