| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 580 | 3,724 | 4,334 | |
| 2020 | R | 745 | 3,976 | 4,762 | |
| 2016 | R | 788 | 3,822 | 4,692 | |
| 2012 | R | 1,016 | 3,640 | 4,716 | |
| 2008 | R | 1,118 | 3,696 | 4,893 | |
| 2004 | R | 1,384 | 3,308 | 4,752 | |
| 2000 | R | 1,359 | 2,817 | 4,328 | |
| 1996 | D | 2,117 | 1,842 | 4,559 | |
| 1992 | D | 2,061 | 1,752 | 4,684 | |
| 1988 | R | 1,423 | 2,997 | 4,559 | |
| 1984 | R | 1,348 | 3,341 | 4,819 | |
| 1980 | R | 1,786 | 2,653 | 4,581 | |
| 1976 | R | 1,830 | 1,890 | 3,806 | |
| 1972 | R | 508 | 2,306 | 2,995 | |
| 1968 | D | 973 | 490 | 3,715 | |
| 1964 | D | 2,534 | 609 | 3,143 | |
| 1960 | R | 694 | 716 | 2,041 | |
| 1956 | R | 468 | 587 | 1,669 | |
| 1952 | D | 1,162 | 961 | 2,123 | |
| 1948 | D | 777 | 151 | 1,748 | |
| 1944 | D | 1,142 | 505 | 1,647 | |
| 1940 | D | 1,668 | 318 | 1,986 | |
| 1936 | D | 1,371 | 235 | 1,606 | |
| 1932 | D | 1,448 | 86 | 1,541 | |
| 1928 | D | 802 | 288 | 1,090 | |
| 1924 | D | 442 | 77 | 523 | |
| 1920 | D | 539 | 128 | 667 | |
| 1916 | D | 554 | 20 | 577 | |
| 1912 | D | 366 | 18 | 504 | |
| 1908 | D | 314 | 21 | 394 | |
| 1904 | D | 198 | 16 | 216 | |
| 1900 | D | 283 | 68 | 351 | |
| 1896 | D | 610 | 26 | 639 | |
| 1892 | D | 670 | 234 | 904 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Caldwell Parish, a rural enclave in north-central Louisiana with roughly 10,500 residents, delivered a 72.5-point Republican presidential margin in 2024—placing it among the state's most one-sided jurisdictions and reflecting broader voting patterns across the region's small, agricultural parishes.
The unraveling was not abrupt. The Democratic margin in Caldwell Parish peaked at ninety-three points in 1916; 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 thirty-four points. By 2024, the margin had widened further.
The economic and demographic context is severe. Caldwell Parish's median household income of $47,028 is among the lowest of any county in the United States; 30% of residents live below the federal poverty line. The county's voting pattern over the last decade is most similar to that of La Paz County and Heard County.