Chatham, Illinois

Chatham population, 2020 to 2024

Chatham added 224 residents from July 2020 to July 2024, a change of +1.6%. In the latest year it moved by +63. Among 330 Illinois places of 5,000 or more, that growth ranks 50th; the median place changed by -0.9%. The median place of 5,000+ in Illinois has 14,760 people, so Chatham is 99% of it.

Chatham covers 7.41 square miles of land, for 1,976 people per square mile of land. The median Illinois place of 5,000+ has 2,177, so Chatham is close to the typical town.

What county Chatham is in

All of Chatham's residents live in Sangamon County, which had 194,345 residents in 2024. Chatham holds 7.5% of the county's population. The shaded shape is on the map above; dots mark the eight nearest places.

ZIP codes in Chatham

1 ZIP Code Tabulation Area (ZCTA) overlaps Chatham by at least 10% of the ZCTA's or the village's land: 62629. ZCTAs are Census approximations of USPS ZIP code delivery areas. The list comes from the 2020 ZCTA to place relationship file, so a village that annexed land after 2020 may reach into ZIP codes not listed here.

Where Chatham is

The Census internal point of Chatham is at 39.674500, -89.693300. Springfield, the capital, is 7.7 miles NNE in a straight line. The nearest larger place is Springfield, IL (112,949 people), 8.5 miles away.

Daylight in Chatham

At 39.67° N, Chatham gets about 14 h 59 min of daylight around the June solstice and 9 h 22 min around the December solstice, a swing of 5 h 37 min. Figures are sunrise to sunset from the SunCalc model for June 21 and December 21, 2026.

Places near Chatham

The eight nearest incorporated places of 1,000+ in Illinois, measured between internal points. The closest is Southern View, 6.0 miles away, with 1,551 people.