| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 991 | 4,852 | 5,890 | |
| 2020 | R | 1,072 | 4,474 | 5,609 | |
| 2016 | R | 890 | 3,585 | 4,622 | |
| 2012 | R | 1,447 | 3,117 | 4,694 | |
| 2008 | R | 1,804 | 2,951 | 4,834 | |
| 2004 | R | 2,192 | 2,819 | 5,054 | |
| 2000 | D | 2,281 | 2,037 | 4,420 | |
| 1996 | D | 1,971 | 1,298 | 3,598 | |
| 1992 | D | 2,491 | 1,218 | 4,152 | |
| 1988 | D | 1,419 | 1,324 | 2,761 | |
| 1984 | R | 1,556 | 1,733 | 3,306 | |
| 1980 | D | 2,190 | 1,076 | 3,309 | |
| 1976 | D | 2,391 | 617 | 3,036 | |
| 1972 | D | 1,138 | 1,056 | 2,248 | |
| 1968 | D | 1,088 | 455 | 2,540 | |
| 1964 | D | 2,061 | 388 | 2,449 | |
| 1960 | D | 1,723 | 580 | 2,312 | |
| 1956 | D | 1,321 | 522 | 1,854 | |
| 1952 | D | 1,308 | 540 | 1,859 | |
| 1948 | D | 1,148 | 381 | 1,636 | |
| 1944 | D | 955 | 252 | 1,207 | |
| 1940 | D | 1,343 | 368 | 1,716 | |
| 1936 | D | 1,068 | 331 | 1,399 | |
| 1932 | D | 799 | 137 | 936 | |
| 1928 | D | 414 | 269 | 683 | |
| 1924 | D | 310 | 191 | 526 | |
| 1920 | R | 403 | 446 | 853 | |
| 1916 | R | 387 | 414 | 807 | |
| 1912 | D | 370 | 126 | 646 | |
| 1908 | D | 465 | 354 | 821 | |
| 1904 | D | 415 | 220 | 656 | |
| 1900 | D | 400 | 202 | 604 | |
| 1896 | D | 329 | 204 | 533 | |
| 1892 | D | 231 | 95 | 362 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Lewis County's 2024 presidential margin of R+65.5 reflects a pattern common across rural Middle Tennessee's small, majority-white communities, where Republican performance has deepened steadily over the past two decades.
The unraveling was not abrupt. The Democratic margin in Lewis County peaked at seventy-one 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 twelve points. By 2024, the margin had widened further.
The economic and demographic context is severe. Lewis County's median household income of $56,285 is among the lowest of any county in the United States; 17% of residents live below the federal poverty line. The county's voting pattern over the last decade is most similar to that of Henry County and White County.
