| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 3,428 | 5,010 | 8,500 | |
| 2020 | R | 3,897 | 4,479 | 8,451 | |
| 2016 | R | 3,541 | 3,930 | 7,645 | |
| 2012 | D | 3,945 | 3,808 | 7,808 | |
| 2008 | D | 4,088 | 3,797 | 7,957 | |
| 2004 | D | 4,135 | 3,298 | 7,478 | |
| 2000 | D | 3,041 | 2,478 | 5,643 | |
| 1996 | D | 2,544 | 1,851 | 4,809 | |
| 1992 | D | 2,271 | 1,506 | 4,678 | |
| 1988 | R | 2,055 | 2,326 | 4,398 | |
| 1984 | R | 2,057 | 2,244 | 4,302 | |
| 1980 | D | 2,367 | 1,623 | 4,141 | |
| 1976 | D | 2,310 | 1,361 | 3,749 | |
| 1972 | R | 1,049 | 2,108 | 3,192 | |
| 1968 | D | 1,066 | 459 | 3,092 | |
| 1964 | R | 1,504 | 1,684 | 3,188 | |
| 1960 | D | 1,129 | 600 | 1,729 | |
| 1956 | D | 1,201 | 540 | 1,741 | |
| 1952 | D | 1,171 | 665 | 1,836 | |
| 1948 | D | 700 | 153 | 1,323 | |
| 1944 | D | 1,071 | 188 | 1,259 | |
| 1940 | D | 1,412 | 215 | 1,627 | |
| 1936 | D | 1,243 | 127 | 1,370 | |
| 1932 | D | 1,418 | 81 | 1,499 | |
| 1928 | D | 919 | 235 | 1,162 | |
| 1924 | D | 566 | 66 | 681 | |
| 1920 | D | 754 | 239 | 1,046 | |
| 1916 | D | 646 | 104 | 759 | |
| 1912 | D | 459 | 47 | 556 | |
| 1908 | D | 565 | 149 | 792 | |
| 1904 | D | 471 | 123 | 609 | |
| 1900 | D | 711 | 143 | 864 | |
| 1896 | D | 1,909 | 242 | 2,187 | |
| 1892 | R | 744 | 1,525 | 2,269 | |
| 1888 | — | — | — | — | |
| 1884 | R | 744 | 1,525 | 2,269 | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Jefferson County sits between Tallahassee and the Gulf coast with a population under 13,000, yet its demographic split — roughly 40% Black residents alongside a white rural majority — produces presidential margins that have swung sharply rightward over the past decade.
The Democratic margin in Jefferson County has rarely exceeded eighty-nine points in modern history; the Republican margin has rarely exceeded thirty-four points. 2024 delivered the county to the Republican candidate by nineteen points.
Jefferson County's demographics resemble the country more than they resemble most counties. A 63% non-Hispanic-white share, a 21% poverty rate, and a median household income of $61,212 — all within the broad national range. The county's voting pattern over the last decade is most similar to that of Hardeman County and Mississippi County.