| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 1,019 | 3,233 | 4,286 | |
| 2020 | R | 1,264 | 3,294 | 4,610 | |
| 2016 | R | 1,185 | 2,911 | 4,216 | |
| 2012 | R | 1,239 | 3,042 | 4,309 | |
| 2008 | R | 1,247 | 3,466 | 4,744 | |
| 2004 | R | 1,133 | 4,139 | 5,291 | |
| 2000 | R | 1,240 | 3,687 | 4,984 | |
| 1996 | R | 1,655 | 3,051 | 5,048 | |
| 1992 | R | 1,642 | 3,137 | 5,559 | |
| 1988 | R | 1,930 | 3,744 | 5,726 | |
| 1984 | R | 1,485 | 4,762 | 6,283 | |
| 1980 | R | 1,666 | 4,073 | 5,864 | |
| 1976 | R | 2,613 | 2,776 | 5,435 | |
| 1972 | R | 1,240 | 3,690 | 5,009 | |
| 1968 | R | 1,545 | 2,474 | 4,713 | |
| 1964 | D | 2,094 | 1,793 | 3,897 | |
| 1960 | R | 1,299 | 2,024 | 3,349 | |
| 1956 | R | 1,361 | 1,685 | 3,055 | |
| 1952 | R | 1,006 | 2,468 | 3,483 | |
| 1948 | D | 1,496 | 535 | 2,089 | |
| 1944 | D | 1,117 | 508 | 1,805 | |
| 1940 | D | 1,219 | 423 | 1,647 | |
| 1936 | D | 1,236 | 142 | 1,387 | |
| 1932 | D | 1,307 | 198 | 1,505 | |
| 1928 | R | 411 | 570 | 981 | |
| 1924 | D | 2,131 | 868 | 3,791 | |
| 1920 | D | 459 | 205 | 666 | |
| 1916 | D | 356 | 77 | 452 | |
| 1912 | D | 221 | 21 | 274 | |
| 1908 | — | — | — | — | |
| 1904 | — | — | — | — | |
| 1900 | — | — | — | — | |
| 1896 | — | — | — | — | |
| 1892 | — | — | — | — | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Deaf Smith County anchors Texas's High Plains beef and dairy corridor, where a heavily agricultural, majority-Hispanic population has nonetheless delivered some of the state's widest Republican presidential margins over the past decade.
The unraveling was not abrupt. The Democratic margin in Deaf Smith County peaked at seventy-nine points in 1936; it narrowed steadily over the late twentieth century. The 1968 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. Deaf Smith County's median household income of $60,799 is among the lowest of any county in the United States; 18% of residents live below the federal poverty line. The county's voting pattern over the last decade is most similar to that of Parmer County and Moore County.