| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 2,699 | 11,478 | 14,358 | |
| 2020 | R | 3,208 | 11,423 | 14,841 | |
| 2016 | R | 3,080 | 10,775 | 14,277 | |
| 2012 | R | 3,484 | 10,014 | 13,734 | |
| 2008 | R | 3,923 | 9,278 | 13,501 | |
| 2004 | R | 4,745 | 8,055 | 13,007 | |
| 2000 | R | 5,162 | 6,945 | 12,546 | |
| 1996 | D | 6,897 | 4,311 | 12,943 | |
| 1992 | D | 7,022 | 4,513 | 13,838 | |
| 1988 | D | 6,799 | 5,851 | 12,791 | |
| 1984 | R | 5,962 | 8,296 | 14,464 | |
| 1980 | D | 6,140 | 5,667 | 12,127 | |
| 1976 | D | 6,376 | 3,603 | 10,278 | |
| 1972 | R | 2,551 | 5,903 | 8,949 | |
| 1968 | D | 2,641 | 2,213 | 9,751 | |
| 1964 | R | 3,673 | 4,966 | 8,639 | |
| 1960 | D | 5,904 | 2,251 | 8,712 | |
| 1956 | R | 2,346 | 4,170 | 6,626 | |
| 1952 | D | 3,584 | 3,447 | 7,031 | |
| 1948 | D | 1,717 | 793 | 3,641 | |
| 1944 | D | 2,329 | 1,156 | 3,485 | |
| 1940 | D | 2,531 | 1,054 | 3,585 | |
| 1936 | D | 2,567 | 608 | 3,175 | |
| 1932 | D | 2,308 | 512 | 2,824 | |
| 1928 | D | 1,703 | 1,120 | 2,823 | |
| 1924 | D | 973 | 883 | 1,856 | |
| 1920 | R | 728 | 895 | 1,623 | |
| 1916 | D | 656 | 200 | 873 | |
| 1912 | — | — | — | — | |
| 1908 | — | — | — | — | |
| 1904 | — | — | — | — | |
| 1900 | — | — | — | — | |
| 1896 | — | — | — | — | |
| 1892 | — | — | — | — | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
A rural pine-belt parish in southwestern Louisiana, Jefferson Davis recorded an R+61 margin in 2024, reflecting the deep-red shift that has reshaped small agricultural communities across the state over recent decades.
The unraveling was not abrupt. The Democratic margin in Jefferson Davis Parish peaked at sixty-four points in 1932; 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 fourteen points. By 2024, the margin had widened further.
The economic and demographic context is severe. Jefferson Davis Parish's median household income of $57,341 is among the lowest of any county in the United States; 15% of residents live below the federal poverty line. The county's voting pattern over the last decade is most similar to that of Vermilion Parish and Calcasieu Parish.