| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 2,328 | 12,657 | 15,112 | |
| 2020 | R | 2,782 | 12,818 | 15,793 | |
| 2016 | R | 2,684 | 11,819 | 14,783 | |
| 2012 | R | 3,511 | 11,111 | 14,830 | |
| 2008 | R | 4,130 | 10,805 | 15,182 | |
| 2004 | R | 5,454 | 8,634 | 14,239 | |
| 2000 | R | 5,059 | 7,254 | 12,638 | |
| 1996 | D | 4,964 | 4,960 | 10,962 | |
| 1992 | D | 6,373 | 6,249 | 14,136 | |
| 1988 | R | 5,335 | 6,641 | 12,102 | |
| 1984 | R | 4,862 | 7,203 | 12,279 | |
| 1980 | D | 6,242 | 5,196 | 12,595 | |
| 1976 | D | 6,995 | 3,430 | 10,770 | |
| 1972 | R | 982 | 5,732 | 6,883 | |
| 1968 | R | 1,122 | 1,760 | 9,186 | |
| 1964 | R | 1,917 | 3,377 | 5,294 | |
| 1960 | D | 3,054 | 820 | 4,475 | |
| 1956 | D | 3,143 | 827 | 4,072 | |
| 1952 | D | 3,275 | 1,155 | 4,430 | |
| 1948 | D | 1,013 | 91 | 3,091 | |
| 1944 | D | 2,669 | 206 | 2,875 | |
| 1940 | D | 2,934 | 133 | 3,068 | |
| 1936 | D | 2,396 | 53 | 2,457 | |
| 1932 | D | 2,461 | 73 | 2,544 | |
| 1928 | D | 1,531 | 335 | 1,866 | |
| 1924 | D | 1,828 | 223 | 2,053 | |
| 1920 | D | 1,336 | 354 | 1,731 | |
| 1916 | D | 1,452 | 125 | 1,589 | |
| 1912 | D | 1,010 | 40 | 1,113 | |
| 1908 | — | — | — | — | |
| 1904 | — | — | — | — | |
| 1900 | D | 770 | 88 | 863 | |
| 1896 | D | 925 | 57 | 987 | |
| 1892 | D | 690 | 52 | 772 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Alcorn County, anchored by Corinth in the state's northeastern corner, posted an R+68.3 presidential margin in 2024, reflecting the heavily rural, white working-class composition that defines much of the Tennessee border region.
The unraveling was not abrupt. The Democratic margin in Alcorn County peaked at ninety-five points in 1936; it narrowed steadily over the late twentieth century. The 2000 election delivered the county to the Republican party for the first time in many years, by a margin of seventeen points. By 2024, the margin had widened further.
The economic and demographic context is severe. Alcorn County's median household income of $51,260 is among the lowest of any county in the United States; 16% of residents live below the federal poverty line. The county's voting pattern over the last decade is most similar to that of Claiborne County and Johnson County.