Jefferson County, Kansas
| Donald Trump ✓Republican | 67.4% | 6,694 |
|---|---|---|
| Kamala HarrisDemocratic | 30.5% | 3,030 |
| Robert F KennedyOther | 1.5% | 146 |
| Year | Margin (D minus R) |
|---|---|
| 1892 | −50.0% |
| 1896 | −1.0% |
| 1900 | −10.6% |
| 1904 | −34.8% |
| 1908 | −13.5% |
| 1912 | +9.8% |
| 1916 | −4.1% |
| 1920 | −38.3% |
| 1924 | −51.0% |
| 1928 | −49.9% |
| 1932 | +3.4% |
| 1936 | −8.9% |
| 1940 | −32.2% |
| 1944 | −37.8% |
| 1948 | −19.3% |
| 1952 | −47.4% |
| 1956 | −40.9% |
| 1960 | −31.6% |
| 1964 | −7.0% |
| 1968 | −29.0% |
| 1972 | −48.3% |
| 1976 | −12.9% |
| 1980 | −36.2% |
| 1984 | −38.6% |
| 1988 | −12.2% |
| 1992 | −0.4% |
| 1996 | −13.4% |
| 2000 | −18.1% |
| 2004 | −24.5% |
| 2008 | −18.7% |
| 2012 | −23.1% |
| 2016 | −31.9% |
| 2020 | −32.1% |
| 2024 | −36.9% |
Jefferson County sits in the northeastern corner of Kansas, where a predominantly rural, white population has produced consistent double-digit Republican presidential margins since at least 2000, reaching R+36.9 in 2024.
Across the recorded series it reached a Democratic high of 9.8 points in 1912 and a Republican high of 51.0 points in 1924. Between 2020 and 2024 the county moved 4.8 points toward the Republican candidate; the 2024 margin was 36.9 points.
A population of 18,349, a 91% non-Hispanic-white share, and a median household income of $81,278 describe the county. The county's voting pattern over the last decade is most similar to that of Surry County and Wright County.
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Jefferson County, Kansas. Akashic. https://akashic.app/county/20087/. Accessed May 20, 2026. License: CC BY 4.0.