South Beloit city, Illinois
Official LSAD Designation: South Beloit city • Census GEOID: 1770590
• Winnebago County
Demographics & Population Profile
Population and demographics for South Beloit city.
| Demographic Variable | Estimate / Count | Margin of Error | Period | Source |
|---|---|---|---|---|
| Total Population (2025 PEP Estimate) | 7,996 | — | 2025 | Census |
| Median Age | 36 yrs | ±3.3 | 2020-2024 | Census ACS 5-Year 2024 |
| Total Households | 3,339 | ±264 | 2020-2024 | Census ACS 5-Year 2024 |
Source: U.S. Census Bureau (PEP, ACS 5-Year).