Keystone city, Iowa
Official LSAD Designation: Keystone city • Census GEOID: 1941115
• Benton County
Demographics & Population Profile
Population and demographics for Keystone city.
| Demographic Variable | Estimate / Count | Margin of Error | Period | Source |
|---|---|---|---|---|
| Total Population (2025 PEP Estimate) | 617 | — | 2025 | Census |
| Median Age | 43.5 yrs | ±10.3 | 2020-2024 | Census ACS 5-Year 2024 |
| Total Households | 270 | ±54 | 2020-2024 | Census ACS 5-Year 2024 |
Source: U.S. Census Bureau (PEP, ACS 5-Year).