Chillicothe, Illinois

Chillicothe population, 2020 to 2024

Chillicothe lost 59 residents from July 2020 to July 2024, a change of -1.0%. In the latest year it moved by +35. Among 330 Illinois places of 5,000 or more, that growth ranks 169th; the median place changed by -0.9%. The median place of 5,000+ in Illinois has 14,760 people, so Chillicothe is 41% of it.

Chillicothe covers 5.27 square miles of land and 0.26 of water, for 1,148 people per square mile of land. The median Illinois place of 5,000+ has 2,177, so Chillicothe is less dense than the typical town.

What county Chillicothe is in

All of Chillicothe's residents live in Peoria County, which had 179,630 residents in 2024. Chillicothe holds 3.4% of the county's population. The shaded shape is on the map above; dots mark the eight nearest places.

ZIP codes in Chillicothe

1 ZIP Code Tabulation Area (ZCTA) overlaps Chillicothe by at least 10% of the ZCTA's or the city's land: 61523. 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 Chillicothe is

The Census internal point of Chillicothe is at 40.916000, -89.502700. Springfield, the capital, is 78.8 miles S in a straight line. The nearest larger place is Peoria, IL (111,696 people), 12.9 miles away.

Daylight in Chillicothe

At 40.92° N, Chillicothe gets about 15 h 07 min of daylight around the June solstice and 9 h 14 min around the December solstice, a swing of 5 h 53 min. Figures are sunrise to sunset from the SunCalc model for June 21 and December 21, 2026.

Places near Chillicothe

The eight nearest incorporated places of 1,000+ in Illinois, measured between internal points. The closest is Lacon, 8.9 miles away, with 1,838 people.