| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 3,390 | 12,426 | 16,001 | |
| 2020 | R | 3,605 | 11,043 | 14,878 | |
| 2016 | R | 2,852 | 8,184 | 11,455 | |
| 2012 | R | 3,725 | 6,832 | 10,741 | |
| 2008 | R | 4,320 | 6,755 | 11,289 | |
| 2004 | R | 4,722 | 5,825 | 10,615 | |
| 2000 | D | 5,107 | 4,105 | 9,359 | |
| 1996 | D | 4,447 | 2,781 | 7,913 | |
| 1992 | D | 4,491 | 2,516 | 8,098 | |
| 1988 | R | 2,795 | 2,975 | 5,791 | |
| 1984 | R | 2,935 | 3,416 | 6,393 | |
| 1980 | D | 4,277 | 2,282 | 6,666 | |
| 1976 | D | 4,457 | 1,674 | 6,209 | |
| 1972 | R | 1,526 | 2,593 | 4,378 | |
| 1968 | D | 1,527 | 1,202 | 6,108 | |
| 1964 | D | 3,989 | 1,340 | 5,329 | |
| 1960 | D | 3,625 | 1,717 | 5,387 | |
| 1956 | D | 4,100 | 1,527 | 5,745 | |
| 1952 | D | 3,837 | 1,525 | 5,362 | |
| 1948 | D | 3,059 | 517 | 4,295 | |
| 1944 | D | 3,812 | 500 | 4,315 | |
| 1940 | D | 3,132 | 389 | 3,523 | |
| 1936 | D | 2,431 | 300 | 2,739 | |
| 1932 | D | 2,167 | 283 | 2,470 | |
| 1928 | D | 735 | 735 | 1,470 | |
| 1924 | D | 1,696 | 349 | 2,085 | |
| 1920 | D | 1,828 | 753 | 2,596 | |
| 1916 | D | 1,652 | 461 | 2,134 | |
| 1912 | D | 1,551 | 376 | 2,025 | |
| 1908 | D | 1,544 | 440 | 2,065 | |
| 1904 | D | 2,152 | 620 | 2,921 | |
| 1900 | D | 2,184 | 763 | 3,153 | |
| 1896 | D | 2,835 | 849 | 3,755 | |
| 1892 | D | 2,185 | 685 | 3,395 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Marshall County's 2024 presidential result—R+56.6—reflects a broader shift in rural Middle Tennessee toward lopsided Republican alignment, a pattern that has deepened each cycle since 2008.
The unraveling was not abrupt. The Democratic margin in Marshall County peaked at seventy-eight points in 1940; it narrowed steadily over the late twentieth century. The 2004 election delivered the county to the Republican party for the first time in many years, by a margin of ten points. By 2024, the margin had widened further.
The economic and demographic context is severe. Marshall County's median household income of $71,049 is among the lowest of any county in the United States; 12% of residents live below the federal poverty line. The county's voting pattern over the last decade is most similar to that of Dickson County and Cannon County.
