Jefferson County, Washington
| Kamala Harris ✓Democratic | 70.7% | 17,459 |
|---|---|---|
| Donald TrumpRepublican | 25.6% | 6,324 |
| Robert F KennedyWe The People | 1.2% | 306 |
| Year | Margin (D minus R) |
|---|---|
| 1892 | +4.0% |
| 1896 | −13.4% |
| 1900 | −26.4% |
| 1904 | −52.0% |
| 1908 | −32.5% |
| 1912 | +0.3% |
| 1916 | −11.0% |
| 1920 | −44.0% |
| 1924 | −43.7% |
| 1928 | −28.7% |
| 1932 | +31.9% |
| 1936 | +35.5% |
| 1940 | +14.9% |
| 1944 | +12.7% |
| 1948 | +8.2% |
| 1952 | −9.8% |
| 1956 | −13.6% |
| 1960 | +2.2% |
| 1964 | +35.5% |
| 1968 | +9.4% |
| 1972 | −13.0% |
| 1976 | +2.0% |
| 1980 | −4.5% |
| 1984 | +0.6% |
| 1988 | +11.3% |
| 1992 | +20.7% |
| 1996 | +18.0% |
| 2000 | +13.8% |
| 2004 | +26.6% |
| 2008 | +34.6% |
| 2012 | +31.7% |
| 2016 | +31.7% |
| 2020 | +41.4% |
| 2024 | +45.1% |
| Year | Total registered |
|---|---|
| 2016 | 26,902 |
| 2018 | 28,117 |
| 2020 | 29,957 |
| 2022 | 29,751 |
| 2024 | 30,674 |
Jefferson County's small, highly educated coastal population on the Olympic Peninsula consistently produces some of the widest Democratic presidential margins in Washington state, reaching D+45 in 2024.
Across the recorded series it reached a Democratic high of 45.1 points in 2024 and a Republican high of 52.0 points in 1904. Between 2020 and 2024 the county moved 3.6 points toward the Democratic candidate; the 2024 margin was 45.1 points.
A population of 33,577, a 85% non-Hispanic-white share, and a median household income of $74,048 describe the county. The county's voting pattern over the last decade is most similar to that of Tompkins County and San Juan County.
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Jefferson County, Washington. Akashic. https://akashic.app/county/53031/. Accessed May 20, 2026. License: CC BY 4.0.