Keystone town, South Dakota
Official LSAD Designation: Keystone town • Census GEOID: 4633820
• Pennington County
Demographics & Population Profile
Population and demographics for Keystone town.
| Demographic Variable | Estimate / Count | Margin of Error | Period | Source |
|---|---|---|---|---|
| Total Population (2025 PEP Estimate) | 268 | — | 2025 | Census |
| Median Age | 38.1 yrs | ±7.1 | 2020-2024 | Census ACS 5-Year 2024 |
| Total Households | 107 | ±38 | 2020-2024 | Census ACS 5-Year 2024 |
Source: U.S. Census Bureau (PEP, ACS 5-Year).