York Township is one of nine townships in DuPage County, Illinois, United States. As of the 2020 census, its population was 128,425 and it contained 53,543 housing units.
According to the 2021 census gazetteer files, York Township has a total area of , of which (or 98.34%) is land and (or 1.66%) is water. The township lies at an elevation of approximately 715 feet (218 m) above sea level.
(This list is based on USGS data and may include former settlements.)
York Township contains several landmarks and institutions, including:
York Township contains twelve cemeteries: Allerton Ridge Memorial Park, Babcock's Grove, Boeger, Brownswood, Chapel Hill Gardens West, college, Glos, Saint John's, Saint Mary's (Elmhurst), Saint Mary's (Lombard), Trinity Lutheran, and Zion Evangelical.
As of the 2020 census there were 128,425 people, 48,178 households, and 31,902 families residing in the township. The population density was . There were 53,543 housing units at an average density of . The racial makeup of the township was 72.08% White, 4.23% African American, 0.40% Native American, 10.90% Asian, 0.02% Pacific Islander, 4.50% from other races, and 7.87% from two or more races. Hispanic or Latino of any race were 11.56% of the population.
There were 48,178 households, out of which 29.80% had children under the age of 18 living with them, 54.62% were married couples living together, 8.03% had a female householder with no spouse present, and 33.78% were non-families. 28.60% of all households were made up of individuals, and 14.70% had someone living alone who was 65 years of age or older. The average household size was 2.57 and the average family size was 3.22.
The township's age distribution consisted of 21.5% under the age of 18, 9.1% from 18 to 24, 25.4% from 25 to 44, 26.1% from 45 to 64, and 17.9% who were 65 years of age or older. The median age was 40.0 years. For every 100 females, there were 92.8 males. For every 100 females age 18 and over, there were 91.5 males.
The median income for a household in the township was $91,471, and the median income for a family was $116,108. Males had a median income of $64,552 versus $41,499 for females. The per capita income for the township was $49,386. About 3.1% of families and 5.5% of the population were below the poverty line, including 4.5% of those under age 18 and 6.1% of those age 65 or over.
York Township was established in 1850 from land settled in 1849. The township seat is located in Lombard. The township government provides general assistance, property assessment, and road maintenance for unincorporated areas. The current Supervisor is Timothy M. Murray (elected 2025).