City · Illinois
South Beloit, Illinois
South Beloit, city, in Winnebago County, Illinois. South Beloit had 7,996 residents on July 1, 2025 by the Census Bureau's estimate, up 0.1% since 2020; the 2020 Census counted 7,989 and the ACS 2020-2024 5-year estimates put it at 7,946 (±23). GEOID 1770590.
Residents, July 2025 estimate
7,996
Census Bureau estimate (no margin published)
2020 Census count: 7,989 · ACS 2020-2024: 7,946 ±23
Median household income
$78,616
±$8,627 (90% margin)
Illinois: $83,390
Median home value
$173,000
±$13,408 (90% margin)
Illinois: $263,300
Median gross rent
$972
±$114 (90% margin)
Illinois: $1,274
Where is South Beloit and what county is it in?
South Beloit is a city in Winnebago County, Illinois. It covers 6.2 square miles of land, 1,295 residents per square mile in 2020.
South Beloit is in the Rockford, IL metropolitan statistical area, which takes in 2 counties (Census Bureau delineation, July 2023).
South Beloit lies mostly within Rockton Township and reaches into Roscoe Township, towns or townships with their own local government (2020 census blocks).
Source: 2024 Gazetteer and 2020 place-by-county files, U.S. Census Bureau · Census reference files
How many people live in South Beloit, and is it growing?
The Census Bureau estimates that 7,996 people lived in South Beloit on July 1, 2025, up 0.1% since 2020, while Illinois shrank 0.8%. The 2020 Census counted 7,989 residents. The 2020-2024 American Community Survey, a five-year sample, puts the population at 7,946 (±23).
| Measure | South Beloit | Winnebago County | Change since 2015-2019 |
|---|---|---|---|
| Total population | 7,946 ±23 | 283,292 | no clear change |
| Households | 3,339 ±264 | 116,014 | no clear change |
| Average household size | 2.36 ±0.19 | 2.41 | no clear change |
| Housing units | 3,559 ±244 | 125,002 | no clear change |
South Beloit's population since 2000
From 5,397 in 2000 to 7,996 in 2025: up 48.2%. The 2000, 2010 and 2020 figures are census counts, each for South Beloit as it was drawn that year: a place that annexed land, or a community that has since incorporated, covered a different area then. The 2005 figure is the Census Bureau's intercensal estimate, revised to fit the 2000 and 2010 counts and drawn on 2010 boundaries; 2015 and 2025 are July 1 estimates made from the census before them.
Source: The 2000, 2010 and 2020 Census counts and the Census Bureau's population estimates (intercensal 2000-2010, Vintage 2020, Vintage 2025) · Census population estimates
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); Census PEP Vintage 2025 (SUB-EST2025, CO-EST2025); 2020 Census P.L. 94-171 · Check it at data.census.gov
Who lives in South Beloit?
The median resident of South Beloit is 36.0 years old; 24.9% are under 18 and 13.2% are 65 or older. The largest group is non-Hispanic white residents at 76.3%, then Hispanic or Latino residents (of any race) at 11.5%. 4.3% of residents were born outside the United States.
| Measure | South Beloit | Winnebago County | Change since 2015-2019 |
|---|---|---|---|
| Median age | 36.0 ±3.3 | 39.6 | no clear change |
| Under 18 years | 24.9% ±3.7 pts | 23.5% | – |
| 65 years and over | 13.2% ±3.9 pts | 18.5% | – |
| Male | 48.1% ±3.6 pts | 48.9% | – |
| Hispanic or Latino (any race) | 11.5% ±4.2 pts | 15.5% | no clear change |
| White alone, not Hispanic | 76.3% ±6.0 pts | 63.8% | no clear change |
| Black or African American alone, not Hispanic | 3.2% ±3.1 pts | 11.6% | – |
| Asian alone, not Hispanic | 1.1% ±1.6 pts | 2.9% | – |
| American Indian and Alaska Native alone, not Hispanic | 0.0% ±0.5 pts | 0.1% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.1% ±0.2 pts | 0.0% | – |
| Two or more races, not Hispanic | 7.8% ±4.5 pts | 5.8% | – |
| Some other race alone, not Hispanic | 0.0% ±0.5 pts | 0.3% | – |
| Born outside the United States | 4.3% ±2.0 pts | 8.9% | no clear change |
| Speak a language other than English at home (age 5+) | 10.7% ±4.8 pts | 15.2% | – |
| Civilian veterans (age 18+) | 6.7% ±3.5 pts | 6.1% | – |
| With a disability | 10.4% ±3.6 pts | 15.3% | – |
| No health insurance coverage | 7.2% ±5.3 pts | 6.2% | – |
| High school graduate or higher (age 25+) | 95.7% ±2.7 pts | 88.8% | – |
| Bachelor's degree or higher (age 25+) | 28.4% ±6.6 pts | 25.2% | +12.2 pts |
| Graduate or professional degree (age 25+) | 10.2% ±4.1 pts | 9.4% | – |
| Lived in the same house a year earlier | 85.2% ±5.1 pts | 87.5% | – |
| Moved from another state in the past year | 2.1% ±2.8 pts | 1.6% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profiles DP02, DP05) · Check it at data.census.gov
What do households in South Beloit earn?
Half of South Beloit's 3,339 households earn less than $78,616 a year (±$8,627), against $65,837 in Winnebago County and $83,390 in Illinois. In 2015-2019 it was $74,853 in 2024 dollars; the margins of error cannot tell the two periods apart. 8.0% of residents live below the poverty line.
| Measure | South Beloit | Winnebago County | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $78,616 ±$8,627 | $65,837 | no clear change |
| Mean household income | $86,474 ±$9,882 | $86,473 | – |
| Per capita income | $36,716 ±$4,114 | $35,697 | +$5,280 |
| People below the poverty line | 8.0% ±3.7 pts | 15.6% | no clear change |
| Children under 18 below the poverty line | 10.8% ±7.3 pts | 22.2% | – |
| Households receiving SNAP | 15.4% ±6.0 pts | 20.4% | – |
| Households with a computer | 96.1% ±2.8 pts | 93.9% | – |
| Households with a broadband subscription | 91.7% ±5.8 pts | 88.8% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What does housing cost in South Beloit?
Owners occupy 69.0% of South Beloit's occupied homes and renters 31.0%. The median owner-occupied home is valued at $173,000 by its owner (±$13,408). The median renter pays $972 a month including utilities.
| Measure | South Beloit | Winnebago County | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $173,000 ±$13,408 | $164,500 | +$18,179 |
| Median gross rent | $972 ±$114 | $1,021 | no clear change |
| Renters paying 35% or more of income on rent | 18.1% ±13.9 pts | 40.6% | – |
| Median monthly owner costs, with a mortgage | $1,524 ±$108 | $1,411 | – |
| Owner-occupied homes | 69.0% ±7.0 pts | 65.9% | no clear change |
| Renter-occupied homes | 31.0% ±7.0 pts | 34.1% | – |
| Housing units | 3,559 ±244 | 125,002 | no clear change |
| Homeowner vacancy rate | 0.0% ±1.6 pts | 1.0% | – |
| Rental vacancy rate | 9.1% ±10.7 pts | 4.6% | – |
| Single-family detached homes | 70.5% ±7.1 pts | 70.4% | – |
| Mobile homes | 7.2% ±4.9 pts | 1.3% | – |
| Built 2020 or later | 0.0% ±1.0 pts | 0.3% | – |
| Built 2010 to 2019 | 5.4% ±3.9 pts | 2.3% | – |
| Built 1939 or earlier | 13.4% ±5.7 pts | 15.5% | – |
| Households with no vehicle | 2.3% ±1.5 pts | 8.6% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP04) · Check it at data.census.gov
How do people in South Beloit work and get to work?
72.8% of South Beloit's workers drive alone. The average trip to work takes 24.8 minutes. The unemployment rate in 2020-2024 averaged 5.9%.
| Measure | South Beloit | Winnebago County | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 76.6% ±4.5 pts | 61.5% | – |
| Unemployment rate | 5.9% ±2.7 pts | 7.3% | – |
| Drove alone to work | 72.8% ±6.6 pts | 76.8% | – |
| Carpooled | 21.9% ±6.4 pts | 10.2% | – |
| Public transportation | 0.0% ±0.1 pts | 0.5% | – |
| Walked | 0.0% ±0.1 pts | 1.1% | – |
| Worked from home | 2.1% ±1.8 pts | 9.8% | – |
| Mean travel time to work | 24.8 min ±4.1 | 23.0 min | no clear change |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What census tracts are in South Beloit?
2 census tracts lie mostly in South Beloit, and 3 more reach into it (2020 census blocks). Their median household incomes run from $57,420 (Tract 40.03) to $64,740 (Tract 40.04).
| Tract | Residents, 2020-2024 | Median household income |
|---|---|---|
| Tract 40.04Winnebago County | 6,157 | $64,740 |
| Tract 40.03Winnebago County | 2,081 | $57,420 |
| Tract 40.02Winnebago County | 5,901 | $83,140 |
| Tract 39.03Winnebago County | 5,849 | $123,102 |
| Tract 40.05Winnebago County | 3,337 | $123,618 |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); 2020 block assignment files (tract share = share of the tract's census blocks in South Beloit) · Census block assignment files
How does South Beloit compare with other places in Illinois?
By the Census Bureau's July 2025 estimates, South Beloit is the 3,745th-most populous of the 19,476 U.S. incorporated places that have one and the 262nd-most populous of 1,294 in Illinois.
South Beloit ranks 668th of 1,380 places in Illinois with 1,000 or more residents and a reliable estimate, by median household income.
| Measure | Rank | Of |
|---|---|---|
| Population, July 2025 estimate | 262nd | 1,294 |
| Growth 2020-2025 (PEP) | 263rd | 1,347 |
| Residents per square mile | 518th | 1,383 |
| Median household income | 668th | 1,380 |
| Per capita income | 799th | 1,383 |
| Median home value | 673rd | 1,379 |
| Median gross rent | 613th | 1,280 |
| Poverty rate | 718th | 1,119 |
| Bachelor's degree or higher | 519th | 1,369 |
| Median age | 1,202nd | 1,383 |
| Owner-occupied share | 1,069th | 1,382 |
| Travel time to work | 759th | 1,382 |
South Beloit's figures with every place in Illinois (CSV)
Every place in Illinois, sortable · Compare South Beloit with other places
Source: PlainCities ranks computed from the American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) and PEP Vintage 2025 · How ranks are computed
How reliable are the figures for South Beloit?
17 of the 57 figures for South Beloit on this page carry a coefficient of variation over 40% and are marked with a ring: they come from a small sample, so read them as rough.
The American Community Survey samples about one household in eight over five years, so every figure is an estimate with a 90% margin of error (shown under each value). A ring marks an estimate whose coefficient of variation is over 40%. A change is called only when the gap between the two periods is larger than their combined 90% margin (the square root of the sum of the two squared margins), the Census Bureau's test. How to read a margin of error.
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026): margins of error as published · ACS technical documentation
How these figures are made: methodology and release checks · reading a margin of error · every state · corrections
Not on this page: crime, weather and schools for South Beloit are other agencies' records. Crime: the FBI's Crime Data Explorer · climate: NOAA's U.S. Climate Normals · schools: the National Center for Education Statistics' public schools in South Beloit.