Jefferson County, Oregon
| Donald Trump ✓Republican | 63.4% | 7,454 |
|---|---|---|
| Kamala HarrisDemocratic | 33.5% | 3,941 |
| Robert F KennedyWe The People | 1.5% | 182 |
| Year | Margin (D minus R) |
|---|---|
| 1916 | +20.1% |
| 1920 | −31.9% |
| 1924 | −13.8% |
| 1928 | −21.3% |
| 1932 | +29.2% |
| 1936 | +32.5% |
| 1940 | +4.9% |
| 1944 | −16.9% |
| 1948 | −5.1% |
| 1952 | −34.5% |
| 1956 | −9.7% |
| 1960 | −7.6% |
| 1964 | +18.4% |
| 1968 | −16.9% |
| 1972 | −18.2% |
| 1976 | −1.1% |
| 1980 | −18.3% |
| 1984 | −26.1% |
| 1988 | −3.3% |
| 1992 | +3.4% |
| 1996 | −1.3% |
| 2000 | −16.8% |
| 2004 | −18.7% |
| 2008 | −8.7% |
| 2012 | −16.4% |
| 2016 | −26.5% |
| 2020 | −23.5% |
| 2024 | −29.9% |
Jefferson County sits in Oregon's arid interior plateau, where a sparse, rural population centered on agriculture and the Warm Springs Reservation has delivered double-digit Republican presidential margins in every cycle since 2000.
Across the recorded series it reached a Democratic high of 32.5 points in 1936 and a Republican high of 34.5 points in 1952. Between 2020 and 2024 the county moved 6.4 points toward the Republican candidate; the 2024 margin was 29.9 points.
A population of 25,203, a 57% non-Hispanic-white share, and a median household income of $76,260 describe the county. The county's voting pattern over the last decade is most similar to that of Davison County and Daviess County.
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Jefferson County, Oregon. Akashic. https://akashic.app/county/41031/. Accessed May 20, 2026. License: CC BY 4.0.