Hermiston city, Oregon
Official LSAD Designation: Hermiston city • Census GEOID: 4133700
• Umatilla County
Demographics & Population Profile
Population and demographics for Hermiston city.
| Demographic Variable | Estimate / Count | Margin of Error | Period | Source |
|---|---|---|---|---|
| Total Population (2025 PEP Estimate) | 19,906 | — | 2025 | Census |
| Median Age | 30.9 yrs | ±1.9 | 2020-2024 | Census ACS 5-Year 2024 |
| Total Households | 6,564 | ±363 | 2020-2024 | Census ACS 5-Year 2024 |
Source: U.S. Census Bureau (PEP, ACS 5-Year).