South Beloit, Illinois

South Beloit population, 2020 to 2024

South Beloit added 1 residents from July 2020 to July 2024, a change of +0.0%. In the latest year it moved by +51. Among 330 Illinois places of 5,000 or more, that growth ranks 112th; the median place changed by -0.9%. The median place of 5,000+ in Illinois has 14,760 people, so South Beloit is 54% of it.

South Beloit covers 6.17 square miles of land and 0.25 of water, for 1,294 people per square mile of land. The median Illinois place of 5,000+ has 2,177, so South Beloit is less dense than the typical town.

What county South Beloit is in

All of South Beloit's residents live in Winnebago County, which had 283,790 residents in 2024. South Beloit holds 2.8% of the county's population. The shaded shape is on the map above; dots mark the eight nearest places.

ZIP codes in South Beloit

1 ZIP Code Tabulation Area (ZCTA) overlaps South Beloit by at least 10% of the ZCTA's or the city's land: 61080. 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 South Beloit is

The Census internal point of South Beloit is at 42.484800, -89.027400. Springfield, the capital, is 189.6 miles S in a straight line. The nearest larger place is Beloit, WI (36,633 people), 2.7 miles away. The nearest city of 100,000 or more is Rockford, IL, 15.7 miles away.

Daylight in South Beloit

At 42.48° N, South Beloit gets about 15 h 18 min of daylight around the June solstice and 9 h 04 min around the December solstice, a swing of 6 h 14 min. Figures are sunrise to sunset from the SunCalc model for June 21 and December 21, 2026.

Places near South Beloit

The eight nearest incorporated places of 1,000+ in Illinois, measured between internal points. The closest is Rockton, 3.2 miles away, with 7,861 people.