Illiopolis village, Illinois
Official LSAD Designation: Illiopolis village • Census GEOID: 1737127
• Sangamon County
Demographics & Population Profile
Population and demographics for Illiopolis village.
| Demographic Variable | Estimate / Count | Margin of Error | Period | Source |
|---|---|---|---|---|
| Total Population (2025 PEP Estimate) | 832 | — | 2025 | Census |
| Median Age | 43.3 yrs | ±9.4 | 2020-2024 | Census ACS 5-Year 2024 |
| Total Households | 368 | ±58 | 2020-2024 | Census ACS 5-Year 2024 |
Source: U.S. Census Bureau (PEP, ACS 5-Year).