| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 6,888 | 7,977 | 14,983 | |
| 2020 | D | 8,057 | 7,566 | 15,817 | |
| 2016 | D | 8,023 | 6,587 | 14,839 | |
| 2012 | D | 9,650 | 6,473 | 16,240 | |
| 2008 | D | 9,685 | 6,683 | 16,478 | |
| 2004 | D | 8,591 | 5,975 | 14,649 | |
| 2000 | D | 7,735 | 4,723 | 12,592 | |
| 1996 | D | 7,521 | 3,272 | 11,340 | |
| 1992 | D | 7,913 | 3,847 | 12,512 | |
| 1988 | D | 6,982 | 4,668 | 11,751 | |
| 1984 | D | 5,845 | 4,389 | 10,278 | |
| 1980 | D | 7,153 | 3,455 | 10,848 | |
| 1976 | D | 6,769 | 2,242 | 9,226 | |
| 1972 | R | 1,875 | 3,326 | 5,356 | |
| 1968 | D | 2,907 | 577 | 6,278 | |
| 1964 | R | 343 | 2,251 | 2,594 | |
| 1960 | D | 681 | 404 | 1,785 | |
| 1956 | D | 1,192 | 287 | 1,694 | |
| 1952 | D | 1,847 | 604 | 2,451 | |
| 1948 | D | 152 | 29 | 1,397 | |
| 1944 | D | 1,441 | 63 | 1,504 | |
| 1940 | D | 1,403 | 48 | 1,451 | |
| 1936 | D | 1,111 | 22 | 1,134 | |
| 1932 | D | 1,281 | 38 | 1,320 | |
| 1928 | D | 1,422 | 100 | 1,522 | |
| 1924 | D | 1,142 | 40 | 1,182 | |
| 1920 | D | 823 | 30 | 856 | |
| 1916 | D | 1,017 | 8 | 1,026 | |
| 1912 | D | 779 | 9 | 836 | |
| 1908 | — | — | — | — | |
| 1904 | — | — | — | — | |
| 1900 | D | 1,085 | 91 | 1,177 | |
| 1896 | D | 1,286 | 72 | 1,378 | |
| 1892 | D | 1,097 | 22 | 1,276 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Marshall County's population is roughly 45% Black, yet its presidential margin shifted sharply rightward between 2012 and 2024, reflecting a statewide realignment pattern that analysts are still working to explain.
The county's recent history is a story of close margins. The Democratic margin reached ninety-eight points in 1916; the Republican margin reached seventy-four points in 1964. Most other elections have been decided by single-digit points.
Marshall County's demographics — a population of 33,979, a 47% non-Hispanic-white share, a median household income of $53,458 — situate the county close to national averages on several dimensions. The county's voting pattern over the last decade is most similar to that of Jasper County and Lee County.
