City in Marion County, Oregon · 0.9 sq mi · 3,839 people per sq mi
3,289 people live in Jefferson. The typical household earns $102,159, and the median resident is 31.2 years old.
2026 projection
From 3,327 in 2020
Poverty rate 9.21%
Men 28.2 · Women 33
1890–2026
3,289
2026 projection
1.1% since 2020 (decrease)
Source: U.S. Census Bureau decennial counts and annual estimates, including 2010–2020 intercensal estimates. 2026 is a projection. Values between recorded years are interpolated.
Use the left and right arrow keys to inspect population observations.
1890–2026
3,289
2026 projection
1.1% since 2020 (decrease)
Source: U.S. Census Bureau decennial counts and annual estimates, including 2010–2020 intercensal estimates. 2026 is a projection. Values between recorded years are interpolated.
Use the left and right arrow keys to inspect population observations.
| 2026 | 3,289 | -10 | 0.30% |
|---|---|---|---|
| 2025 | 3,299 | -4 | 0.12% |
| 2024 | 3,303 | +13 | 0.40% |
| 2023 | 3,290 | -22 | 0.66% |
| 2022 | 3,312 | -29 | 0.87% |
| 2021 | 3,341 | +14 | 0.42% |
| 2020 | 3,327 | +11 | 0.33% |
| 2019 | 3,316 | +9 | 0.27% |
| 2018 | 3,307 | +30 | 0.92% |
| 2017 | 3,277 | +36 | 1.11% |
Showing 10 of 29 years.
The 2020 row compares the April 1 Census count with the July 1, 2019 estimate (about nine months). Its Growth and Annual change therefore do not represent a full year.
Jefferson has a population change lower than Marion County, Oregon, and the U.S.
Change from July 1, 2020 to July 1, 2025 population estimates—not annualized growth or site projections.
Source: U.S. Census Bureau. U.S. totals are summed from the 50 states and D.C.; unavailable comparisons are omitted.
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S0101
Each square is about 1% of residents (roughly 33 people).
Hispanic or Latino residents can be of any race. All other groups exclude Hispanic residents.
U.S. Census Bureau, 2024 ACS 5-year estimates · Table B03002
Half of households earn more, half earn less
Typical yearly pay for a worker 25 or older.
About 1 in 11 residents
50% of residents age 15 and older are married.
| Status | Overall | Male | Female |
|---|---|---|---|
| Married | 50% | 50% | 50% |
| Never married | 37% | 44% | 30% |
| Divorced | 8% | 6% | 11% |
| Widowed | 3% | <1% | 5% |
| Separated | 2% | 0% | 3% |
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S1201
14 sources