Millington is a village in Kendall and LaSalle counties in the U.S. state of Illinois. The population was 617 at the 2020 census down from 665 at the 2010 census,. The Kendall County portion of Millington is part of the Chicago–Naperville–Joliet Metropolitan Statistical Area, while the LaSalle County portion is part of the Ottawa Micropolitan Statistical Area. Geography Millington is in the western part of Kendall County and the northeastern part of LaSalle County at . In the 2010 census, 245 of Millington's residents lived in Kendall County and 420 lived in LaSalle County. The actual boundary line of the counties is not clearly defined in town, although a road farther south, named "Sandhill Road" in Kendall County and "N. 4201 Rd." in LaSalle County, clearly shows the county line, especially in the winter, as LaSalle County is slower in plowing the road, while the Kendall County portion is somewhat clear. According to the 2021 census gazetteer files, Millington has a total area of , of which (or 92.79%) is land and (or 7.21%) is water. It lies mostly on the southeast side of the Fox River, except for a neighborhood along Belle Rive Drive on the northwest side of the river. Millington is north of Newark, south of Sandwich, and southwest of Yorkville. Joliet is to the east, and Aurora is to the northeast. Demographics As of the census of 2020, there were 617 people, 257 households, and 190 families residing in the village. The population density was . There were 240 housing units at an average density of . The racial makeup of the village was 92.54% White, 0.16% African American, 0% Asian, 0.97% American Indian and Alaska Native, and 4.86% from two or more races. Hispanic or Latino of any race were 4.38% of the population. There were 257 households, out of which 38.5% had children under the age of 18 living with them, 53.3% were married couples living together, 4.3% had a female householder with no husband present, and 10.0% were non-families. 24.1% of all households were made up of individuals, and 5.4% had someone living alone who was 65 years of age or older. The average household size was 2.58 and the average family size was 3.01. In the village, the population was spread out, with 26.4% under the age of 18, 5.7% from 18 to 24, 28.8% from 25 to 44, 33.2% from 45