Williamsville village, Illinois
Official LSAD Designation: Williamsville village • Census GEOID: 1781854
• Sangamon County
Demographics & Population Profile
Population and demographics for Williamsville village.
| Demographic Variable | Estimate / Count | Margin of Error | Period | Source |
|---|---|---|---|---|
| Total Population (2025 PEP Estimate) | 1,437 | — | 2025 | Census |
| Median Age | 43.4 yrs | ±4.7 | 2020-2024 | Census ACS 5-Year 2024 |
| Total Households | 530 | ±126 | 2020-2024 | Census ACS 5-Year 2024 |
Source: U.S. Census Bureau (PEP, ACS 5-Year).