Fairview Heights city, Illinois
Official LSAD Designation: Fairview Heights city • Census GEOID: 1725141
• St. Clair County
Demographics & Population Profile
Population and demographics for Fairview Heights city.
| Demographic Variable | Estimate / Count | Margin of Error | Period | Source |
|---|---|---|---|---|
| Total Population (2025 PEP Estimate) | 16,175 | — | 2025 | Census |
| Median Age | 41 yrs | ±2.5 | 2020-2024 | Census ACS 5-Year 2024 |
| Total Households | 7,221 | ±465 | 2020-2024 | Census ACS 5-Year 2024 |
Source: U.S. Census Bureau (PEP, ACS 5-Year).