Jersey County, Illinois
| Donald Trump ✓Republican | 74.3% | 8,684 |
|---|---|---|
| Kamala HarrisDemocratic | 24.1% | 2,816 |
| Robert F Kennedy Jr.Independent | 1.6% | 191 |
| Year | Margin (D minus R) |
|---|---|
| 1892 | +19.8% |
| 1896 | +18.0% |
| 1900 | +17.4% |
| 1904 | +5.4% |
| 1908 | +10.6% |
| 1912 | +25.7% |
| 1916 | +7.0% |
| 1920 | −17.6% |
| 1924 | +4.8% |
| 1928 | −9.5% |
| 1932 | +27.2% |
| 1936 | +13.2% |
| 1940 | −3.5% |
| 1944 | −9.8% |
| 1948 | +1.2% |
| 1952 | −8.1% |
| 1956 | −10.5% |
| 1960 | −1.9% |
| 1964 | +12.8% |
| 1968 | −5.6% |
| 1972 | −21.7% |
| 1976 | +3.9% |
| 1980 | −21.6% |
| 1984 | −15.5% |
| 1988 | +0.4% |
| 1992 | +18.0% |
| 1996 | +12.1% |
| 2000 | −3.7% |
| 2004 | −8.3% |
| 2008 | −2.7% |
| 2012 | −23.7% |
| 2016 | −46.1% |
| 2020 | −48.1% |
| 2024 | −50.2% |
| Year | Total registered |
|---|---|
| 2016 | 18,868 |
| 2018 | 16,341 |
| 2020 | 16,639 |
| 2022 | 15,735 |
| 2024 | 15,887 |
Jersey County, a rural Mississippi River county southwest of St. Louis, has shifted steadily rightward over two decades — its 2024 presidential margin of R+50 places it among the most lopsided counties in a state that trends Democratic statewide.
Across the recorded series it reached a Democratic high of 27.2 points in 1932 and a Republican high of 50.2 points in 2024. Between 2020 and 2024 the county moved 2.1 points toward the Republican candidate; the 2024 margin was 50.2 points.
A population of 21,274, a 95% non-Hispanic-white share, and a median household income of $80,361 describe the county. The county's voting pattern over the last decade is most similar to that of Marion County and St. Francois County.
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Jersey County, Illinois. Akashic. https://akashic.app/county/17083/. Accessed May 20, 2026. License: CC BY 4.0.