| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 2,732 | 6,354 | 9,193 | |
| 2020 | R | 3,225 | 6,607 | 9,940 | |
| 2016 | R | 3,157 | 6,287 | 9,597 | |
| 2012 | R | 3,387 | 5,846 | 9,329 | |
| 2008 | R | 3,311 | 5,751 | 9,181 | |
| 2004 | R | 3,082 | 5,471 | 8,665 | |
| 2000 | R | 3,282 | 4,895 | 8,485 | |
| 1996 | D | 4,143 | 3,765 | 8,710 | |
| 1992 | R | 3,706 | 3,808 | 8,903 | |
| 1988 | R | 2,833 | 5,226 | 8,315 | |
| 1984 | R | 2,918 | 5,980 | 9,083 | |
| 1980 | R | 3,745 | 4,772 | 8,744 | |
| 1976 | R | 3,495 | 3,630 | 7,270 | |
| 1972 | R | 1,335 | 4,304 | 6,079 | |
| 1968 | R | 1,017 | 1,031 | 6,463 | |
| 1964 | D | 4,498 | 747 | 5,245 | |
| 1960 | R | 996 | 1,378 | 3,869 | |
| 1956 | D | 1,094 | 1,063 | 3,557 | |
| 1952 | D | 2,499 | 1,645 | 4,144 | |
| 1948 | D | 960 | 119 | 2,535 | |
| 1944 | D | 2,087 | 488 | 2,575 | |
| 1940 | D | 2,417 | 310 | 2,727 | |
| 1936 | D | 2,425 | 165 | 2,594 | |
| 1932 | D | 1,773 | 46 | 1,820 | |
| 1928 | D | 1,083 | 242 | 1,325 | |
| 1924 | D | 678 | 116 | 794 | |
| 1920 | D | 664 | 50 | 714 | |
| 1916 | D | 650 | 7 | 657 | |
| 1912 | D | 393 | 2 | 437 | |
| 1908 | D | 445 | 9 | 454 | |
| 1904 | D | 291 | 7 | 298 | |
| 1900 | D | 304 | 13 | 317 | |
| 1896 | D | 706 | 61 | 778 | |
| 1892 | D | 882 | 4 | 886 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Richland Parish, anchored by the small city of Rayville, sits in Louisiana's northeastern delta region and has delivered Republican presidential margins above 35 points in each of the last three cycles, reflecting a predominantly rural, majority-white electorate.
The unraveling was not abrupt. The Democratic margin in Richland Parish peaked at ninety-nine 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 nineteen points. By 2024, the margin had settled into deep Republican territory.
The economic and demographic context is severe. Richland Parish's median household income of $53,544 is among the lowest of any county in the United States; 24% of residents live below the federal poverty line. The county's voting pattern over the last decade is most similar to that of Rapides Parish and Grady County.