Winfield is an incorporated village located in Milton and Winfield Townships, DuPage County, Illinois, United States. The population was 9,080 at the 2010 census and as of 2018 the population was 9,690.
Winfield is located at 41°51′57″N 88°09′25″W / 41.86583°N 88.15694°W / 41.86583; -88.15694 (41.8658543, -88.1569256). Winfield is, by and large, surrounded by forests, including several DuPage County Forest Preserves on the north, west, and south. It borders Wheaton to the east and West Chicago to the west.
According to the 2010 census, Winfield has a total area of 3.03 square miles (7.85 km), of which 2.99 square miles (7.74 km) (or 98.68%) is land and 0.04 square miles (0.10 km) (or 1.32%) is water.
As of the census of 2000, there were 8,718 people, 2,975 households, and 2,403 families residing in the village. The population density was 3,228.3 people per square mile (1,246.7/km²). There were 3,024 housing units at an average density of 1,119.8 per square mile (432.4/km²). The racial makeup of the village was 93.60% White, 1.24% African American, 0.10% Native American, 2.96% Asian, 0.02% Pacific Islander, 0.91% from other races, and 1.17% from two or more races. Hispanic or Latino of any race were 2.67% of the population. 22.9% were of German, 12.9% Irish, 10.8% Italian, 9.3% English and 8.6% Polish ancestry according to Census 2000.
There were 2,975 households out of which 43.0% had children under the age of 18 living with them, 72.5% were married couples living together, 6.4% had a female householder with no husband present, and 19.2% were non-families. 16.3% 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 2.91 and the average family size was 3.30.
In the village, the population was spread out with 30.1% under the age of 18, 5.1% from 18 to 24, 31.5% from 25 to 44, 25.6% from 45 to 64, and 7.7% who were 65 years of age or older. The median age was 37 years. For every 100 females, there were 95.4 males. For every 100 females age 18 and over, there were 91.8 males.
The median household income for Winfield in 2016 is $91,731 and per capita income is $42,097. The median household cost is $308,700.