| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 5,913 | 19,002 | 25,204 | |
| 2020 | R | 6,106 | 17,643 | 24,233 | |
| 2016 | R | 4,722 | 13,233 | 18,699 | |
| 2012 | R | 6,233 | 11,296 | 17,835 | |
| 2008 | R | 7,506 | 11,677 | 19,519 | |
| 2004 | R | 8,597 | 10,567 | 19,298 | |
| 2000 | D | 8,332 | 7,016 | 15,556 | |
| 1996 | D | 7,458 | 5,283 | 13,829 | |
| 1992 | D | 7,863 | 4,450 | 14,093 | |
| 1988 | R | 5,129 | 5,343 | 10,536 | |
| 1984 | R | 5,809 | 5,846 | 11,805 | |
| 1980 | D | 6,622 | 3,636 | 10,467 | |
| 1976 | D | 6,551 | 2,285 | 8,922 | |
| 1972 | R | 2,619 | 3,645 | 6,446 | |
| 1968 | D | 2,034 | 1,291 | 6,800 | |
| 1964 | D | 4,724 | 1,281 | 6,005 | |
| 1960 | D | 3,930 | 1,928 | 5,894 | |
| 1956 | D | 3,799 | 1,247 | 5,114 | |
| 1952 | D | 4,196 | 1,415 | 5,611 | |
| 1948 | D | 2,337 | 485 | 3,145 | |
| 1944 | D | 2,379 | 600 | 2,990 | |
| 1940 | D | 2,784 | 527 | 3,319 | |
| 1936 | D | 2,022 | 402 | 2,437 | |
| 1932 | D | 2,007 | 369 | 2,380 | |
| 1928 | D | 1,428 | 891 | 2,319 | |
| 1924 | D | 1,648 | 516 | 2,270 | |
| 1920 | D | 2,145 | 1,412 | 3,557 | |
| 1916 | D | 2,105 | 1,008 | 3,154 | |
| 1912 | D | 1,689 | 448 | 2,485 | |
| 1908 | D | 1,499 | 899 | 2,467 | |
| 1904 | D | 1,490 | 828 | 2,429 | |
| 1900 | D | 1,691 | 964 | 2,707 | |
| 1896 | D | 1,976 | 841 | 2,867 | |
| 1892 | D | 1,385 | 494 | 2,208 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Dickson County sits in the outer Nashville exurban ring, and its electorate has shifted steadily rightward as rural working-class voters realigned; the 2024 presidential margin of R+51.9 reflects a pattern common to small Tennessee counties beyond the metro core.
The unraveling was not abrupt. The Democratic margin in Dickson County peaked at sixty-nine points in 1932; 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. Dickson County's median household income of $75,003 is among the lowest of any county in the United States; 11% of residents live below the federal poverty line. The county's voting pattern over the last decade is most similar to that of White County and Marshall County.