Sangerfield is a town in Oneida County, New York, United States. The population was 2,561 at the 2010 census. The town is named after Jedediah Sanger, an early settler.
According to the United States Census Bureau, the town has a total area of 31.0 square miles (80 km), of which, 30.8 square miles (80 km) of it is land and 0.2 square miles (0.52 km) of it (0.52%) is water.
The south town line and the west town line are the border of Madison County, New York. US Route 20 crosses the town. The Sangerfield River is an important stream flowing southward through the town.
As of the census of 2000, there were 2,610 people, 944 households, and 684 families residing in the town. The population density was 84.7 people per square mile (32.7/km²). There were 1,010 housing units at an average density of 32.8 per square mile (12.7/km²). The racial makeup of the town was 98.31% White, 0.38% African American, 0.31% Native American, 0.38% Asian, 0.04% Pacific Islander, 0.04% from other races, and 0.54% from two or more races. Hispanic or Latino of any race were 0.54% of the population.
There were 944 households out of which 38.2% had children under the age of 18 living with them, 55.2% were married couples living together, 13.0% had a female householder with no husband present, and 27.5% were non-families. 22.5% of all households were made up of individuals and 10.7% had someone living alone who was 65 years of age or older. The average household size was 2.67 and the average family size was 3.09.
In the town, the population was spread out with 28.2% under the age of 18, 7.0% from 18 to 24, 26.9% from 25 to 44, 21.5% from 45 to 64, and 16.3% who were 65 years of age or older. The median age was 38 years. For every 100 females, there were 91.6 males. For every 100 females age 18 and over, there were 82.7 males.
The median income for a household in the town was $38,264, and the median income for a family was $44,871. Males had a median income of $31,144 versus $21,250 for females. The per capita income for the town was $17,068. About 5.9% of families and 9.7% of the population were below the poverty line, including 10.6% of those under age 18 and 9.2% of those age 65 or over.