York is a town in western Livingston County, New York, United States. Its population was 3,397 at the 2010 census.
According to the United States Census Bureau, the town has a total area of 49.1 square miles (127 km), of which, 49.1 square miles (127 km) of it is land and 0.02% is water.
The west town line borders Genesee County and Wyoming County.
New York State Route 36 (north-south) intersects New York State Route 63 (east-west) at Greigsville. US Route 20 passes along the north town line.
As of the census of 2000, there were 3,219 people, 1,181 households, and 881 families residing in the town. The population density was 65.6 people per square mile (25.3/km²). There were 1,231 housing units at an average density of 25.1 per square mile (9.7/km²). The racial makeup of the town was 97.42% White, 1.06% African American, 0.09% Native American, 0.56% Asian, and 0.87% from two or more races. Hispanic or Latino of any race were 0.84% of the population.
There were 1,181 households out of which 35.0% had children under the age of 18 living with them, 62.2% were married couples living together, 8.4% had a female householder with no husband present, and 25.4% were non-families. 21.3% of all households were made up of individuals and 9.5% had someone living alone who was 65 years of age or older. The average household size was 2.69 and the average family size was 3.12.
In the town, the population was spread out with 26.7% under the age of 18, 6.6% from 18 to 24, 30.6% from 25 to 44, 24.8% from 45 to 64, and 11.4% who were 65 years of age or older. The median age was 38 years. For every 100 females, there were 102.6 males. For every 100 females age 18 and over, there were 98.6 males.
The median income for a household in the town was $43,229, and the median income for a family was $50,136. Males had a median income of $34,048 versus $20,430 for females. The per capita income for the town was $19,796. About 1.2% of families and 1.8% of the population were below the poverty line, including none of those under age 18 and 4.4% of those age 65 or over.