| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 4,536 | 20,378 | 25,283 | |
| 2020 | R | 4,144 | 18,538 | 23,101 | |
| 2016 | R | 3,882 | 17,316 | 22,286 | |
| 2012 | R | 4,786 | 14,833 | 19,619 | |
| 2008 | R | 5,520 | 15,195 | 20,715 | |
| 2004 | R | 5,970 | 14,136 | 20,106 | |
| 2000 | R | 6,037 | 10,040 | 16,276 | |
| 1996 | R | 6,256 | 7,228 | 15,598 | |
| 1992 | R | 6,177 | 6,997 | 17,757 | |
| 1988 | R | 6,689 | 7,994 | 14,848 | |
| 1984 | R | 4,846 | 11,042 | 15,960 | |
| 1980 | R | 5,330 | 8,131 | 13,971 | |
| 1976 | D | 7,155 | 4,686 | 11,955 | |
| 1972 | R | 3,440 | 7,762 | 11,499 | |
| 1968 | D | 4,760 | 4,242 | 11,119 | |
| 1964 | D | 7,593 | 3,569 | 11,162 | |
| 1960 | R | 5,446 | 5,913 | 11,359 | |
| 1956 | D | 6,773 | 5,191 | 11,964 | |
| 1952 | D | 7,710 | 6,348 | 14,058 | |
| 1948 | D | 8,136 | 2,882 | 11,018 | |
| 1944 | D | 7,689 | 4,069 | 11,778 | |
| 1940 | D | 8,075 | 4,299 | 12,417 | |
| 1936 | D | 9,025 | 3,013 | 12,099 | |
| 1932 | D | 9,247 | 2,034 | 11,281 | |
| 1928 | R | 3,667 | 6,332 | 10,109 | |
| 1924 | D | 5,091 | 2,640 | 8,586 | |
| 1920 | D | 4,277 | 3,403 | 8,158 | |
| 1916 | D | 3,243 | 1,272 | 5,356 | |
| 1912 | D | 2,577 | 1,121 | 4,470 | |
| 1908 | D | 2,826 | 1,491 | 4,604 | |
| 1904 | — | — | — | — | |
| 1900 | — | — | — | — | |
| 1896 | — | — | — | — | |
| 1892 | — | — | — | — | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Grady County, anchored by Chickasha, has delivered Republican presidential margins exceeding 60 points in recent cycles, reflecting the deep conservative lean common to southwestern Oklahoma's largely rural, energy-dependent economy.
The unraveling was not abrupt. The Democratic margin in Grady County peaked at sixty-four points in 1932; it narrowed steadily over the late twentieth century. The 1980 election delivered the county to the Republican party for the first time in many years, by a margin of twenty points. By 2024, the margin had widened further.
The economic and demographic context is severe. Grady County's median household income of $75,419 is among the lowest of any county in the United States; 12% of residents live below the federal poverty line. The county's voting pattern over the last decade is most similar to that of Stephens County and Beauregard Parish.