| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 500 | 2,006 | 2,533 | |
| 2020 | R | 597 | 2,076 | 2,708 | |
| 2016 | R | 657 | 1,944 | 2,706 | |
| 2012 | R | 906 | 1,815 | 2,721 | |
| 2008 | R | 1,042 | 2,195 | 3,237 | |
| 2004 | R | 1,175 | 2,273 | 3,448 | |
| 2000 | R | 1,400 | 1,920 | 3,349 | |
| 1996 | D | 1,827 | 1,346 | 3,659 | |
| 1992 | D | 1,749 | 1,377 | 4,178 | |
| 1988 | D | 2,148 | 1,754 | 3,928 | |
| 1984 | R | 1,674 | 2,637 | 4,326 | |
| 1980 | R | 2,144 | 2,450 | 4,687 | |
| 1976 | D | 2,852 | 1,802 | 4,695 | |
| 1972 | R | 1,256 | 3,331 | 4,697 | |
| 1968 | D | 1,771 | 1,748 | 4,895 | |
| 1964 | D | 3,354 | 2,001 | 5,355 | |
| 1960 | D | 2,736 | 2,678 | 5,414 | |
| 1956 | D | 3,366 | 1,810 | 5,176 | |
| 1952 | D | 3,639 | 2,657 | 6,296 | |
| 1948 | D | 4,071 | 1,058 | 5,129 | |
| 1944 | D | 3,902 | 1,496 | 5,410 | |
| 1940 | D | 4,920 | 1,564 | 6,508 | |
| 1936 | D | 5,268 | 1,126 | 6,410 | |
| 1932 | D | 4,960 | 523 | 5,483 | |
| 1928 | R | 2,141 | 3,331 | 5,497 | |
| 1924 | D | 2,653 | 1,326 | 4,163 | |
| 1920 | D | 2,649 | 1,539 | 4,338 | |
| 1916 | D | 2,250 | 625 | 3,257 | |
| 1912 | D | 1,801 | 638 | 2,811 | |
| 1908 | D | 1,661 | 732 | 2,516 | |
| 1904 | — | — | — | — | |
| 1900 | — | — | — | — | |
| 1896 | — | — | — | — | |
| 1892 | — | — | — | — | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Tillman County, anchored by Frederick in southwest Oklahoma, recorded an R+59.5 presidential margin in 2024 — among the widest in a state where rural agricultural counties have shifted sharply over the past two decades.
The unraveling was not abrupt. The Democratic margin in Tillman 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 sixteen points. By 2024, the margin had widened further.
The economic and demographic context is severe. Tillman County's median household income of $48,939 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 Kiowa County and Caddo County.