| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 247 | 1,825 | 2,083 | |
| 2020 | R | 288 | 1,857 | 2,160 | |
| 2016 | R | 266 | 1,455 | 1,762 | |
| 2012 | R | 248 | 1,368 | 1,624 | |
| 2008 | R | 314 | 1,389 | 1,715 | |
| 2004 | R | 288 | 1,514 | 1,807 | |
| 2000 | R | 415 | 1,520 | 1,949 | |
| 1996 | R | 643 | 973 | 1,773 | |
| 1992 | R | 641 | 986 | 1,988 | |
| 1988 | R | 632 | 1,017 | 1,651 | |
| 1984 | R | 512 | 1,218 | 1,740 | |
| 1980 | R | 605 | 1,093 | 1,716 | |
| 1976 | D | 907 | 698 | 1,618 | |
| 1972 | R | 287 | 935 | 1,243 | |
| 1968 | D | 373 | 343 | 1,255 | |
| 1964 | D | 892 | 402 | 1,297 | |
| 1960 | D | 831 | 350 | 1,203 | |
| 1956 | D | 903 | 318 | 1,227 | |
| 1952 | D | 952 | 562 | 1,516 | |
| 1948 | D | 945 | 77 | 1,077 | |
| 1944 | D | 758 | 131 | 986 | |
| 1940 | D | 1,044 | 136 | 1,181 | |
| 1936 | D | 775 | 70 | 854 | |
| 1932 | D | 694 | 44 | 744 | |
| 1928 | R | 213 | 330 | 543 | |
| 1924 | D | 327 | 92 | 426 | |
| 1920 | D | 136 | 33 | 175 | |
| 1916 | D | 125 | 14 | 161 | |
| 1912 | D | 125 | 4 | 137 | |
| 1908 | — | — | — | — | |
| 1904 | — | — | — | — | |
| 1900 | — | — | — | — | |
| 1896 | — | — | — | — | |
| 1892 | — | — | — | — | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Martin County, anchored by the small city of Stanton in the Permian Basin, recorded an R+75.8 presidential margin in 2024 — among the widest in the state — reflecting the deeply conservative lean common to rural West Texas oil-patch communities.
The unraveling was not abrupt. The Democratic margin in Martin County peaked at eighty-eight points in 1912; 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-eight points. By 2024, the margin had widened further.
The economic and demographic context is severe. Martin County's median household income of $93,734 is among the lowest of any county in the United States; 8% of residents live below the federal poverty line. The county's voting pattern over the last decade is most similar to that of Scurry County and Gaines County.