Rochester village, Illinois
Official LSAD Designation: Rochester village • Census GEOID: 1764759
• Sangamon County
Demographics & Population Profile
Population and demographics for Rochester village.
| Demographic Variable | Estimate / Count | Margin of Error | Period | Source |
|---|---|---|---|---|
| Total Population (2025 PEP Estimate) | 4,093 | — | 2025 | Census |
| Median Age | 39.8 yrs | ±6 | 2020-2024 | Census ACS 5-Year 2024 |
| Total Households | 1,423 | ±153 | 2020-2024 | Census ACS 5-Year 2024 |
Source: U.S. Census Bureau (PEP, ACS 5-Year).