| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 1,667 | 5,436 | 7,196 | |
| 2020 | R | 1,791 | 5,487 | 7,376 | |
| 2016 | R | 1,587 | 4,931 | 6,751 | |
| 2012 | R | 2,115 | 4,520 | 6,742 | |
| 2008 | R | 2,246 | 4,189 | 6,527 | |
| 2004 | R | 2,046 | 4,023 | 6,111 | |
| 2000 | R | 2,110 | 3,130 | 5,344 | |
| 1996 | D | 2,087 | 1,975 | 4,474 | |
| 1992 | D | 2,438 | 1,820 | 4,855 | |
| 1988 | R | 1,991 | 2,427 | 4,434 | |
| 1984 | R | 1,905 | 2,512 | 4,436 | |
| 1980 | D | 2,619 | 1,913 | 4,605 | |
| 1976 | D | 2,727 | 991 | 3,745 | |
| 1972 | R | 1,514 | 1,767 | 3,337 | |
| 1968 | D | 1,330 | 1,100 | 3,621 | |
| 1964 | D | 2,790 | 912 | 3,714 | |
| 1960 | D | 2,411 | 1,500 | 3,911 | |
| 1956 | D | 2,517 | 1,329 | 3,855 | |
| 1952 | D | 2,585 | 1,134 | 3,725 | |
| 1948 | D | 2,485 | 816 | 3,383 | |
| 1944 | D | 2,511 | 1,332 | 3,857 | |
| 1940 | D | 2,883 | 1,494 | 4,388 | |
| 1936 | D | 2,928 | 1,521 | 4,468 | |
| 1932 | D | 3,611 | 1,452 | 5,078 | |
| 1928 | R | 2,031 | 2,346 | 4,383 | |
| 1924 | D | 2,625 | 2,130 | 4,802 | |
| 1920 | D | 3,056 | 2,420 | 5,548 | |
| 1916 | D | 1,722 | 1,533 | 3,329 | |
| 1912 | R | 1,263 | 1,322 | 2,848 | |
| 1908 | D | 1,680 | 1,351 | 3,095 | |
| 1904 | R | 1,170 | 1,285 | 2,597 | |
| 1900 | D | 1,533 | 1,455 | 3,076 | |
| 1896 | D | 1,633 | 1,295 | 2,981 | |
| 1892 | D | 1,088 | 814 | 2,322 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Trigg County's 2024 presidential margin of R+52.4 reflects a broader shift in rural western Kentucky toward lopsided Republican support, a pattern that has accelerated steadily over the past two decades as the region's agricultural and working-class base realigned.
The unraveling was not abrupt. The Democratic margin in Trigg County peaked at fifty-one points in 1964; 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 nineteen points. By 2024, the margin had widened further.
The economic and demographic context is severe. Trigg County's median household income of $59,857 is among the lowest of any county in the United States; 21% of residents live below the federal poverty line. The county's voting pattern over the last decade is most similar to that of Jasper County and Atkinson County.