| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 3,569 | 13,999 | 17,812 | |
| 2020 | R | 3,323 | 12,344 | 15,976 | |
| 2016 | R | 2,804 | 10,478 | 13,818 | |
| 2012 | R | 3,681 | 9,520 | 13,201 | |
| 2008 | R | 4,426 | 9,307 | 13,733 | |
| 2004 | R | 5,745 | 8,615 | 14,360 | |
| 2000 | R | 5,554 | 6,084 | 11,746 | |
| 1996 | D | 5,962 | 3,943 | 11,335 | |
| 1992 | D | 6,259 | 3,452 | 13,468 | |
| 1988 | D | 6,849 | 4,615 | 11,501 | |
| 1984 | R | 5,475 | 6,246 | 11,769 | |
| 1980 | D | 6,410 | 3,980 | 10,582 | |
| 1976 | D | 7,410 | 2,848 | 10,293 | |
| 1972 | R | 3,144 | 5,397 | 8,718 | |
| 1968 | D | 3,214 | 2,727 | 8,205 | |
| 1964 | D | 5,934 | 2,652 | 8,586 | |
| 1960 | D | 4,428 | 3,845 | 8,273 | |
| 1956 | D | 5,729 | 2,939 | 8,668 | |
| 1952 | D | 6,739 | 3,340 | 10,079 | |
| 1948 | D | 7,748 | 1,366 | 9,114 | |
| 1944 | D | 7,180 | 1,677 | 8,874 | |
| 1940 | D | 9,095 | 2,190 | 11,310 | |
| 1936 | D | 8,106 | 1,362 | 9,488 | |
| 1932 | D | 7,681 | 825 | 8,506 | |
| 1928 | D | 3,885 | 3,014 | 6,950 | |
| 1924 | D | 4,593 | 1,780 | 7,072 | |
| 1920 | D | 4,502 | 3,127 | 8,053 | |
| 1916 | D | 2,974 | 1,267 | 5,007 | |
| 1912 | D | 2,278 | 711 | 3,845 | |
| 1908 | D | 2,215 | 1,044 | 3,738 | |
| 1904 | — | — | — | — | |
| 1900 | — | — | — | — | |
| 1896 | — | — | — | — | |
| 1892 | — | — | — | — | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Bryan County, anchored by Durant and Southeastern Oklahoma State University, has shifted decisively Republican over the past two decades, with 2024 presidential results reflecting margins typical of rural Oklahoma's most consolidated conservative counties.
The unraveling was not abrupt. The Democratic margin in Bryan County peaked at eighty-one 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 five points. By 2024, the margin had widened further.
The economic and demographic context is severe. Bryan County's median household income of $57,225 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 Marshall County and Raleigh County.