| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 1,696 | 9,485 | 11,309 | |
| 2020 | R | 1,858 | 9,485 | 11,467 | |
| 2016 | R | 1,802 | 8,656 | 10,726 | |
| 2012 | R | 2,440 | 7,635 | 10,075 | |
| 2008 | R | 2,794 | 7,745 | 10,539 | |
| 2004 | R | 3,684 | 7,472 | 11,156 | |
| 2000 | R | 3,752 | 6,601 | 10,482 | |
| 1996 | D | 4,350 | 3,892 | 9,774 | |
| 1992 | D | 5,082 | 3,519 | 11,494 | |
| 1988 | D | 4,928 | 4,920 | 9,911 | |
| 1984 | R | 3,994 | 6,381 | 10,416 | |
| 1980 | D | 5,953 | 5,189 | 11,372 | |
| 1976 | D | 7,560 | 3,423 | 11,080 | |
| 1972 | R | 2,568 | 6,441 | 9,175 | |
| 1968 | D | 2,944 | 2,795 | 8,619 | |
| 1964 | D | 5,982 | 2,981 | 8,963 | |
| 1960 | D | 4,202 | 3,562 | 7,764 | |
| 1956 | D | 4,761 | 2,707 | 7,468 | |
| 1952 | D | 5,793 | 2,748 | 8,541 | |
| 1948 | D | 6,223 | 1,091 | 7,314 | |
| 1944 | D | 5,322 | 1,419 | 6,751 | |
| 1940 | D | 6,994 | 2,225 | 9,248 | |
| 1936 | D | 5,089 | 1,119 | 6,221 | |
| 1932 | D | 5,886 | 587 | 6,473 | |
| 1928 | D | 2,877 | 1,915 | 4,813 | |
| 1924 | D | 3,279 | 1,669 | 5,185 | |
| 1920 | D | 2,603 | 1,966 | 4,887 | |
| 1916 | D | 1,763 | 795 | 3,212 | |
| 1912 | D | 1,059 | 704 | 2,601 | |
| 1908 | D | 565 | 482 | 1,203 | |
| 1904 | — | — | — | — | |
| 1900 | — | — | — | — | |
| 1896 | — | — | — | — | |
| 1892 | — | — | — | — | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
McCurtain County sits at Oklahoma's southeastern corner, touching Arkansas, Texas, and Louisiana — a timber-economy region where the 2024 presidential margin exceeded 68 points, among the widest gaps in the state.
The unraveling was not abrupt. The Democratic margin in McCurtain County peaked at eighty-two 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 twenty-seven points. By 2024, the margin had widened further.
The economic and demographic context is severe. McCurtain County's median household income of $51,929 is among the lowest of any county in the United States; 21% of residents live below the federal poverty line. The county's voting pattern over the last decade is most similar to that of Shelby County and Sabine County.