Perinton (originally Perrinton (in federal censuses) and sometimes Perrington when still part of Ontario County) is a town in Monroe County, New York, United States. The population was 46,462 at the 2010 census.
According to the United States Census Bureau, the town has a total area of 34.6 square miles (89.5 km), of which 34.2 square miles (88.5 km) is land and 0.35 square miles (0.9 km), or 1.04%, is water.
As of the census of 2000, there were 46,090 people, 17,591 households, and 12,964 families residing in the town. The population density was 1,350.6 people per square mile (521.4/km²). There were 18,041 housing units at an average density of 528.6 per square mile (204.1/km²). The racial makeup of the town was 93.90% White, 1.72% African American, 0.11% Native American, 2.84% Asian, 0.01% Pacific Islander, 0.45% from other races, and 0.97% from two or more races. Hispanic or Latino of any race were 1.43% of the population.
There were 17,591 households out of which 36.4% had children under the age of 18 living with them, 64.4% were married couples living together, 7.1% had a female householder with no husband present, and 26.3% were non-families. 21.7% of all households were made up of individuals and 7.5% had someone living alone who was 65 years of age or older. The average household size was 2.59 and the average family size was 3.06.
In the town, the population was spread out with 26.7% under the age of 18, 5.0% from 18 to 24, 28.5% from 25 to 44, 28.1% from 45 to 64, and 11.6% who were 65 years of age or older. The median age was 39 years. For every 100 females, there were 93.1 males. For every 100 females age 18 and over, there were 89.2 males.
The median income for a household in the town was $69,341, and the median income for a family was $80,606. Males had a median income of $60,587 versus $36,113 for females. The per capita income for the town was $31,948. About 1.8% of families and 2.9% of the population were below the poverty line, including 2.8% of those under age 18 and 3.4% of those age 65 or over.