Seneca village, Illinois
Official LSAD Designation: Seneca village • Census GEOID: 1768640
• Grundy County / LaSalle County
Demographics & Population Profile
Population and demographics for Seneca village.
| Demographic Variable | Estimate / Count | Margin of Error | Period | Source |
|---|---|---|---|---|
| Total Population (2025 PEP Estimate) | 2,310 | — | 2025 | Census |
| Median Age | 35.5 yrs | ±9.6 | 2020-2024 | Census ACS 5-Year 2024 |
| Total Households | 907 | ±119 | 2020-2024 | Census ACS 5-Year 2024 |
Source: U.S. Census Bureau (PEP, ACS 5-Year).