Jefferson County's 2026 population is estimated at 25,648, reflecting a 0.22% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Jefferson County is the 25th largest county in Oregon. The 2010 population was 21,662 and has grown 18.4% since 2010.
Data after 2023 is projected based on recent change
Overall: 41.5 years
Female: 42.2 years
Male: 40.9 years
There are 19,484 adults, (5,016 of whom are seniors) in Jefferson County.
Female: 12,105 (48%)
Male: 13,098 (52%)
The racial composition of Jefferson County includes 62.01% White, 13.65% Native American, 8.16% other race, and smaller percentages for Black or African American, Asian, Native Hawaiian or Pacific Islander and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 15,628 | 62.01% |
| Two or more races | 3,785 | 15.02% |
| Native American | 3,439 | 13.65% |
| Other race | 2,056 | 8.16% |
| Black or African American | 142 | 0.56% |
| Asian | 118 | 0.47% |
| Native Hawaiian or Pacific Islander | 35 | 0.14% |
Jefferson County 's average per capita income is $44,592. Household income levels show a median of $76,260. The poverty rate stands at 13.4%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $92,944 | - |
| Families | $83,373 | $101,999 |
| Households | $76,260 | $93,094 |
| Non Families | $49,583 | $60,801 |
Average Income
Median Household Income
Poverty Rate
