| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 7,864 | 34,461 | 42,845 | |
| 2020 | R | 8,672 | 36,024 | 45,388 | |
| 2016 | R | 8,423 | 31,959 | 41,645 | |
| 2012 | R | 9,623 | 28,592 | 39,075 | |
| 2008 | R | 9,662 | 27,089 | 37,893 | |
| 2004 | R | 14,417 | 22,734 | 37,864 | |
| 2000 | R | 14,627 | 18,575 | 34,449 | |
| 1996 | D | 18,810 | 12,105 | 34,596 | |
| 1992 | D | 16,182 | 12,744 | 35,645 | |
| 1988 | R | 15,013 | 16,152 | 32,179 | |
| 1984 | R | 10,186 | 20,930 | 32,005 | |
| 1980 | R | 14,222 | 14,951 | 30,818 | |
| 1976 | D | 14,131 | 11,434 | 26,266 | |
| 1972 | R | 5,713 | 13,936 | 20,737 | |
| 1968 | D | 5,516 | 4,797 | 21,223 | |
| 1964 | R | 6,164 | 12,045 | 18,209 | |
| 1960 | D | 12,244 | 2,930 | 16,055 | |
| 1956 | R | 3,466 | 5,741 | 9,528 | |
| 1952 | D | 5,396 | 3,739 | 9,135 | |
| 1948 | D | 1,586 | 1,247 | 5,913 | |
| 1944 | D | 4,980 | 875 | 5,855 | |
| 1940 | D | 3,531 | 1,065 | 4,596 | |
| 1936 | D | 2,195 | 1,630 | 3,827 | |
| 1932 | D | 2,623 | 364 | 2,988 | |
| 1928 | D | 1,994 | 243 | 2,237 | |
| 1924 | D | 678 | 611 | 1,289 | |
| 1920 | R | 337 | 1,044 | 1,381 | |
| 1916 | D | 629 | 157 | 1,935 | |
| 1912 | D | 667 | 315 | 1,171 | |
| 1908 | D | 1,072 | 296 | 1,373 | |
| 1904 | D | 931 | 168 | 1,101 | |
| 1900 | D | 1,230 | 828 | 2,058 | |
| 1896 | D | 1,129 | 386 | 1,527 | |
| 1892 | D | 2,922 | 200 | 3,122 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Lafourche stretches 70 miles down Bayou Lafourche to the Gulf, and its economy—built on offshore energy and commercial fishing—tracks closely with the parish's consistent, wide Republican margins in statewide and federal races.
The unraveling was not abrupt. The Democratic margin in Lafourche Parish peaked at eighty-seven points in 1892; 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 eleven points. By 2024, the margin had widened further.
The economic and demographic context is severe. Lafourche Parish's median household income of $63,135 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 Grant County and Bell County.
