Marble Rock city, Iowa
Official LSAD Designation: Marble Rock city • Census GEOID: 1949305
• Floyd County
Demographics & Population Profile
Population and demographics for Marble Rock city.
| Demographic Variable | Estimate / Count | Margin of Error | Period | Source |
|---|---|---|---|---|
| Total Population (2025 PEP Estimate) | 255 | — | 2025 | Census |
| Median Age | 51.5 yrs | ±5.4 | 2020-2024 | Census ACS 5-Year 2024 |
| Total Households | 87 | ±24 | 2020-2024 | Census ACS 5-Year 2024 |
Source: U.S. Census Bureau (PEP, ACS 5-Year).