Grenville town, South Dakota
Official LSAD Designation: Grenville town • Census GEOID: 4626220
• Day County
Demographics & Population Profile
Population and demographics for Grenville town.
| Demographic Variable | Estimate / Count | Margin of Error | Period | Source |
|---|---|---|---|---|
| Total Population (2025 PEP Estimate) | 48 | — | 2025 | Census |
| Median Age | 57.8 yrs | ±15.7 | 2020-2024 | Census ACS 5-Year 2024 |
| Total Households | 30 | ±22 | 2020-2024 | Census ACS 5-Year 2024 |
Source: U.S. Census Bureau (PEP, ACS 5-Year).