Fairmont city, West Virginia
Official LSAD Designation: Fairmont city • Census GEOID: 5426452
• Marion County
Demographics & Population Profile
Population and demographics for Fairmont city.
| Demographic Variable | Estimate / Count | Margin of Error | Period | Source |
|---|---|---|---|---|
| Total Population (2025 PEP Estimate) | 18,035 | — | 2025 | Census |
| Median Age | 34.9 yrs | ±1.6 | 2020-2024 | Census ACS 5-Year 2024 |
| Total Households | 8,017 | ±339 | 2020-2024 | Census ACS 5-Year 2024 |
Source: U.S. Census Bureau (PEP, ACS 5-Year).