Wilmington, Illinois

Wilmington population, 2020 to 2024

Wilmington lost 21 residents from July 2020 to July 2024, a change of -0.4%. In the latest year it moved by +43. Among 330 Illinois places of 5,000 or more, that growth ranks 136th; the median place changed by -0.9%. The median place of 5,000+ in Illinois has 14,760 people, so Wilmington is 38% of it.

Wilmington covers 14.04 square miles of land and 0.72 of water, for 401 people per square mile of land. The median Illinois place of 5,000+ has 2,177, so Wilmington is less dense than the typical town.

What county Wilmington is in

All of Wilmington's residents live in Will County, which had 708,583 residents in 2024. Wilmington holds 0.8% of the county's population. The shaded shape is on the map above; dots mark the eight nearest places.

ZIP codes in Wilmington

1 ZIP Code Tabulation Area (ZCTA) overlaps Wilmington by at least 10% of the ZCTA's or the city's land: 60481. ZCTAs are Census approximations of USPS ZIP code delivery areas. The list comes from the 2020 ZCTA to place relationship file, so a city that annexed land after 2020 may reach into ZIP codes not listed here.

Where Wilmington is

The Census internal point of Wilmington is at 41.319400, -88.160200. Springfield, the capital, is 132.0 miles SW in a straight line. The nearest larger place is Braidwood, IL (6,245 people), 4.7 miles away. The nearest city of 100,000 or more is Joliet, IL, 13.7 miles away.

Daylight in Wilmington

At 41.32° N, Wilmington gets about 15 h 10 min of daylight around the June solstice and 9 h 11 min around the December solstice, a swing of 5 h 58 min. Figures are sunrise to sunset from the SunCalc model for June 21 and December 21, 2026.

Places near Wilmington

The eight nearest incorporated places of 1,000+ in Illinois, measured between internal points. The closest is Braidwood, 4.7 miles away, with 6,245 people.