Mason City city, Illinois
Official LSAD Designation: Mason City city • Census GEOID: 1747475
• Mason County
Demographics & Population Profile
Population and demographics for Mason City city.
| Demographic Variable | Estimate / Count | Margin of Error | Period | Source |
|---|---|---|---|---|
| Total Population (2025 PEP Estimate) | 1,956 | — | 2025 | Census |
| Median Age | 49.8 yrs | ±5.2 | 2020-2024 | Census ACS 5-Year 2024 |
| Total Households | 1,054 | ±120 | 2020-2024 | Census ACS 5-Year 2024 |
Source: U.S. Census Bureau (PEP, ACS 5-Year).