| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 146 | 1,565 | 1,728 | |
| 2020 | R | 130 | 1,484 | 1,628 | |
| 2016 | R | 103 | 1,378 | 1,504 | |
| 2012 | R | 131 | 1,218 | 1,363 | |
| 2008 | R | 208 | 1,284 | 1,505 | |
| 2004 | R | 229 | 1,292 | 1,527 | |
| 2000 | R | 264 | 1,066 | 1,347 | |
| 1996 | R | 502 | 792 | 1,471 | |
| 1992 | R | 484 | 623 | 1,533 | |
| 1988 | R | 681 | 865 | 1,554 | |
| 1984 | R | 415 | 1,181 | 1,604 | |
| 1980 | R | 606 | 959 | 1,581 | |
| 1976 | D | 764 | 748 | 1,518 | |
| 1972 | R | 331 | 909 | 1,244 | |
| 1968 | D | 673 | 557 | 1,507 | |
| 1964 | D | 934 | 487 | 1,424 | |
| 1960 | D | 713 | 684 | 1,397 | |
| 1956 | R | 555 | 849 | 1,409 | |
| 1952 | R | 776 | 1,057 | 1,837 | |
| 1948 | D | 892 | 211 | 1,146 | |
| 1944 | D | 1,007 | 135 | 1,339 | |
| 1940 | D | 1,521 | 229 | 1,753 | |
| 1936 | D | 1,153 | 152 | 1,305 | |
| 1932 | D | 1,316 | 117 | 1,438 | |
| 1928 | R | 533 | 558 | 1,092 | |
| 1924 | D | 729 | 727 | 1,456 | |
| 1920 | D | 342 | 116 | 527 | |
| 1916 | D | 378 | 51 | 467 | |
| 1912 | D | 246 | 18 | 340 | |
| 1908 | — | — | — | — | |
| 1904 | — | — | — | — | |
| 1900 | — | — | — | — | |
| 1896 | — | — | — | — | |
| 1892 | — | — | — | — | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
With roughly 3,300 residents spread across ranchland in the Rolling Plains, Shackelford delivered an R+82.1 margin in 2024 — among the widest in the state — reflecting the deep Republican lean typical of sparsely populated West Texas cattle country.
The unraveling was not abrupt. The Democratic margin in Shackelford County peaked at eighty-three 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-two points. By 2024, the margin had widened further.
The economic and demographic context is severe. Shackelford County's median household income of $73,047 is among the lowest of any county in the United States; 10% of residents live below the federal poverty line. The county's voting pattern over the last decade is most similar to that of Burnet County and Archer County.