| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 188 | 1,210 | 1,405 | |
| 2020 | R | 241 | 1,330 | 1,580 | |
| 2016 | R | 249 | 1,207 | 1,513 | |
| 2012 | R | 302 | 1,176 | 1,495 | |
| 2008 | R | 373 | 1,199 | 1,595 | |
| 2004 | R | 480 | 1,214 | 1,702 | |
| 2000 | R | 566 | 976 | 1,557 | |
| 1996 | D | 750 | 610 | 1,531 | |
| 1992 | D | 954 | 614 | 1,936 | |
| 1988 | D | 1,143 | 855 | 2,001 | |
| 1984 | R | 927 | 1,238 | 2,173 | |
| 1980 | D | 1,174 | 1,056 | 2,273 | |
| 1976 | D | 1,403 | 805 | 2,225 | |
| 1972 | R | 614 | 1,357 | 1,987 | |
| 1968 | D | 1,145 | 873 | 2,549 | |
| 1964 | D | 1,835 | 697 | 2,532 | |
| 1960 | R | 1,182 | 1,472 | 2,655 | |
| 1956 | D | 1,281 | 1,119 | 2,409 | |
| 1952 | R | 1,242 | 1,571 | 2,821 | |
| 1948 | D | 1,654 | 226 | 1,976 | |
| 1944 | D | 1,756 | 223 | 2,173 | |
| 1940 | D | 2,453 | 362 | 2,815 | |
| 1936 | D | 1,991 | 207 | 2,208 | |
| 1932 | D | 1,985 | 145 | 2,135 | |
| 1928 | R | 910 | 1,333 | 2,243 | |
| 1924 | D | 1,099 | 256 | 1,408 | |
| 1920 | D | 967 | 252 | 1,324 | |
| 1916 | D | 932 | 94 | 1,155 | |
| 1912 | D | 843 | 36 | 1,066 | |
| 1908 | — | — | — | — | |
| 1904 | — | — | — | — | |
| 1900 | — | — | — | — | |
| 1896 | — | — | — | — | |
| 1892 | — | — | — | — | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Hardeman County, anchored by the small city of Quanah, delivered over 86% of its 2024 presidential vote to the Republican nominee — a margin consistent with the broader shift toward overwhelming GOP dominance across rural northwest Texas over the past two decades.
The unraveling was not abrupt. The Democratic margin in Hardeman County peaked at eighty-six 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 twenty-six points. By 2024, the margin had widened further.
The economic and demographic context is severe. Hardeman County's median household income of $63,333 is among the lowest of any county in the United States; 11% of residents live below the federal poverty line. The county's voting pattern over the last decade is most similar to that of Knox County and Kent County.