Erin is a town in Chemung County, New York, United States. The population was 1,962 at the 2010 census. The town was named by early settlers from Ireland.
According to the United States Census Bureau, the town has a total area of 44.5 square miles (115.2 km), of which 44.2 square miles (114.6 km) is land and 0.23 square miles (0.6 km), or 0.50%, is water. Newtown Creek, a tributary of the Chemung River, flows westward through the town.
The north town line is the border of Schuyler County.
New York State Route 223 passes through Erin village, and the town government is located on this highway.
As of the census of 2000, there were 2,054 people, 751 households, and 608 families residing in the town. The population density was 46.3 people per square mile (17.9/km²). There were 794 housing units at an average density of 17.9 per square mile (6.9/km²). The racial makeup of the town was 98.59% White, 0.15% African American, 0.39% Native American, 0.39% Asian, and 0.49% from two or more races. Hispanic or Latino of any race were 0.44% of the population.
There were 751 households out of which 37.2% had children under the age of 18 living with them, 64.7% were married couples living together, 9.5% had a female householder with no husband present, and 19.0% were non-families. 14.9% of all households were made up of individuals and 5.1% had someone living alone who was 65 years of age or older. The average household size was 2.74 and the average family size was 2.97.
In the town, the population was spread out with 26.0% under the age of 18, 7.5% from 18 to 24, 30.2% from 25 to 44, 27.0% from 45 to 64, and 9.3% who were 65 years of age or older. The median age was 37 years. For every 100 females, there were 105.8 males. For every 100 females age 18 and over, there were 99.3 males.
The median income for a household in the town was $41,795, and the median income for a family was $44,032. Males had a median income of $31,635 versus $21,520 for females. The per capita income for the town was $16,747. About 4.6% of families and 7.5% of the population were below the poverty line, including 9.7% of those under age 18 and 8.9% of those age 65 or over.