| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 22,845 | 40,808 | 64,436 | |
| 2020 | R | 25,913 | 42,255 | 69,166 | |
| 2016 | R | 24,428 | 41,734 | 68,017 | |
| 2012 | R | 26,645 | 40,948 | 68,474 | |
| 2008 | R | 24,813 | 41,741 | 67,244 | |
| 2004 | R | 22,016 | 41,750 | 64,444 | |
| 2000 | R | 21,457 | 35,107 | 58,211 | |
| 1996 | R | 24,525 | 28,559 | 57,594 | |
| 1992 | R | 20,835 | 27,600 | 56,502 | |
| 1988 | R | 15,429 | 33,858 | 50,292 | |
| 1984 | R | 15,525 | 37,270 | 53,574 | |
| 1980 | R | 16,306 | 29,799 | 47,314 | |
| 1976 | R | 15,738 | 24,082 | 40,451 | |
| 1972 | R | 6,920 | 24,860 | 33,263 | |
| 1968 | R | 6,470 | 10,089 | 31,704 | |
| 1964 | D | 21,024 | 4,174 | 25,198 | |
| 1960 | R | 5,202 | 10,525 | 19,291 | |
| 1956 | R | 4,372 | 7,094 | 15,158 | |
| 1952 | D | 9,775 | 8,842 | 18,617 | |
| 1948 | D | 4,213 | 1,729 | 10,802 | |
| 1944 | D | 6,329 | 2,627 | 8,956 | |
| 1940 | D | 8,506 | 1,509 | 10,015 | |
| 1936 | D | 7,635 | 1,113 | 8,748 | |
| 1932 | D | 5,968 | 423 | 6,427 | |
| 1928 | D | 2,739 | 1,380 | 4,119 | |
| 1924 | D | 1,542 | 480 | 2,108 | |
| 1920 | D | 1,481 | 164 | 1,646 | |
| 1916 | D | 1,215 | 35 | 1,253 | |
| 1912 | D | 902 | 17 | 1,075 | |
| 1908 | D | 851 | 60 | 940 | |
| 1904 | D | 669 | 26 | 709 | |
| 1900 | D | 663 | 46 | 709 | |
| 1896 | D | 2,712 | 93 | 2,816 | |
| 1892 | D | 2,701 | 266 | 2,967 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Ouachita Parish, home to Monroe and West Monroe, has shifted from a competitive battleground in the 1990s to a reliably wide-margin Republican parish, reflecting broader realignment across north Louisiana's predominantly white, evangelical electorate.
The shift began with civil rights. 1968 marked the realignment in Ouachita Parish, by a eleven points margin. The Republican margin reached its widest at fifty-four points in 1972. The 2024 margin was twenty-eight points.
The political shift has tracked, in Ouachita Parish, the political shift of the South more broadly. A 56% non-Hispanic-white share, a median household income of $54,688, and a 23% poverty rate describe the demographic context. The county's voting pattern over the last decade is most similar to that of Thomas County and Kershaw County.
