| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 856 | 3,359 | 4,251 | |
| 2020 | R | 1,012 | 2,936 | 3,998 | |
| 2016 | R | 946 | 2,103 | 3,160 | |
| 2012 | R | 1,240 | 1,612 | 2,905 | |
| 2008 | R | 1,475 | 1,688 | 3,239 | |
| 2004 | D | 1,851 | 1,314 | 3,191 | |
| 2000 | D | 1,966 | 950 | 2,945 | |
| 1996 | D | 1,615 | 683 | 2,499 | |
| 1992 | D | 1,846 | 565 | 2,664 | |
| 1988 | D | 1,193 | 969 | 2,173 | |
| 1984 | D | 1,142 | 781 | 1,935 | |
| 1980 | D | 1,674 | 629 | 2,354 | |
| 1976 | D | 1,385 | 332 | 1,726 | |
| 1972 | R | 539 | 663 | 1,230 | |
| 1968 | D | 694 | 252 | 1,595 | |
| 1964 | D | 1,270 | 205 | 1,475 | |
| 1960 | D | 1,036 | 308 | 1,356 | |
| 1956 | D | 1,032 | 209 | 1,247 | |
| 1952 | D | 1,236 | 261 | 1,497 | |
| 1948 | D | 1,014 | 104 | 1,229 | |
| 1944 | D | 1,170 | 131 | 1,304 | |
| 1940 | D | 929 | 94 | 1,025 | |
| 1936 | D | 765 | 72 | 839 | |
| 1932 | D | 835 | 64 | 900 | |
| 1928 | D | 607 | 179 | 787 | |
| 1924 | D | 684 | 143 | 831 | |
| 1920 | D | 955 | 574 | 1,530 | |
| 1916 | D | 688 | 217 | 905 | |
| 1912 | D | 544 | 211 | 790 | |
| 1908 | D | 476 | 198 | 680 | |
| 1904 | D | 488 | 177 | 686 | |
| 1900 | D | 675 | 222 | 927 | |
| 1896 | D | 769 | 313 | 1,086 | |
| 1892 | D | 622 | 240 | 971 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Trousdale County covers just 114 square miles northeast of Nashville, yet its roughly 7,000 residents — many tied to a large correctional facility that shapes local demographics — have delivered some of Tennessee's widest presidential margins.
The unraveling was not abrupt. The Democratic margin in Trousdale County peaked at eighty-six points in 1932; it narrowed steadily over the late twentieth century. The 2008 election delivered the county to the Republican party for the first time in many years, by a margin of seven points. By 2024, the margin had widened further.
The economic and demographic context is severe. Trousdale County's median household income of $72,747 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 Jackson County and Lake County.