Fairfield city, Ohio
Official LSAD Designation: Fairfield city • Census GEOID: 3925970
• Butler County / Hamilton County
Demographics & Population Profile
Population and demographics for Fairfield city.
| Demographic Variable | Estimate / Count | Margin of Error | Period | Source |
|---|---|---|---|---|
| Total Population (2025 PEP Estimate) | 44,682 | — | 2025 | Census |
| Median Age | 38.1 yrs | ±1.7 | 2020-2024 | Census ACS 5-Year 2024 |
| Total Households | 18,428 | ±671 | 2020-2024 | Census ACS 5-Year 2024 |
Source: U.S. Census Bureau (PEP, ACS 5-Year).