Galesburg, Illinois

Galesburg population, 2020 to 2024

Galesburg lost 653 residents from July 2020 to July 2024, a change of -2.2%. In the latest year it moved by +29. Among 330 Illinois places of 5,000 or more, that growth ranks 228th; the median place changed by -0.9%. The median place of 5,000+ in Illinois has 14,760 people, so Galesburg is 2.0 times that size.

Galesburg covers 17.77 square miles of land and 0.18 of water, for 1,648 people per square mile of land. The median Illinois place of 5,000+ has 2,177, so Galesburg is less dense than the typical town.

What county Galesburg is in

All of Galesburg's residents live in Knox County, which had 48,716 residents in 2024. Galesburg holds 60.1% of the county's population. The shaded shape is on the map above; dots mark the eight nearest places.

ZIP codes in Galesburg

2 ZIP Code Tabulation Areas (ZCTAs) overlap Galesburg by at least 10% of the ZCTA's or the city's land: 61401, 61402. 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 Galesburg is

The Census internal point of Galesburg is at 40.950200, -90.376600. Springfield, the capital, is 89.4 miles SSE in a straight line. The nearest larger place is Moline, IL (42,442 people), 37.3 miles away. The nearest city of 100,000 or more is Peoria, IL, 42.0 miles away.

Daylight in Galesburg

At 40.95° N, Galesburg 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 54 min. Figures are sunrise to sunset from the SunCalc model for June 21 and December 21, 2026.

Places near Galesburg

The eight nearest incorporated places of 1,000+ in Illinois, measured between internal points. The closest is Knoxville, 5.6 miles away, with 2,840 people.