Belvidere city, Illinois
Official LSAD Designation: Belvidere city • Census GEOID: 1705092
• Boone County
Demographics & Population Profile
Population and demographics for Belvidere city.
| Demographic Variable | Estimate / Count | Margin of Error | Period | Source |
|---|---|---|---|---|
| Total Population (2025 PEP Estimate) | 25,462 | — | 2025 | Census |
| Median Age | 38.7 yrs | ±2 | 2020-2024 | Census ACS 5-Year 2024 |
| Total Households | 9,589 | ±364 | 2020-2024 | Census ACS 5-Year 2024 |
Source: U.S. Census Bureau (PEP, ACS 5-Year).