Jefferson city, Oregon
Official LSAD Designation: Jefferson city • Census GEOID: 4137250
• Marion County
Demographics & Population Profile
Population and demographics for Jefferson city.
| Demographic Variable | Estimate / Count | Margin of Error | Period | Source |
|---|---|---|---|---|
| Total Population (2025 PEP Estimate) | 3,299 | — | 2025 | Census |
| Median Age | 31.2 yrs | ±2.6 | 2020-2024 | Census ACS 5-Year 2024 |
| Total Households | 967 | ±88 | 2020-2024 | Census ACS 5-Year 2024 |
Source: U.S. Census Bureau (PEP, ACS 5-Year).