| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 38 | 623 | 663 | |
| 2020 | R | 39 | 611 | 653 | |
| 2016 | R | 34 | 553 | 604 | |
| 2012 | R | 44 | 526 | 578 | |
| 2008 | R | 52 | 502 | 557 | |
| 2004 | R | 44 | 488 | 533 | |
| 2000 | R | 39 | 528 | 571 | |
| 1996 | R | 70 | 382 | 484 | |
| 1992 | R | 100 | 379 | 574 | |
| 1988 | R | 143 | 384 | 528 | |
| 1984 | R | 128 | 403 | 536 | |
| 1980 | R | 116 | 416 | 535 | |
| 1976 | R | 190 | 218 | 413 | |
| 1972 | R | 75 | 288 | 369 | |
| 1968 | R | 106 | 169 | 447 | |
| 1964 | R | 179 | 183 | 363 | |
| 1960 | D | 207 | 152 | 366 | |
| 1956 | R | 174 | 224 | 398 | |
| 1952 | R | 197 | 235 | 432 | |
| 1948 | D | 188 | 69 | 278 | |
| 1944 | D | 185 | 34 | 269 | |
| 1940 | D | 268 | 41 | 311 | |
| 1936 | D | 252 | 29 | 283 | |
| 1932 | D | 212 | 42 | 254 | |
| 1928 | R | 34 | 124 | 158 | |
| 1924 | D | 89 | 14 | 109 | |
| 1920 | D | 91 | 25 | 117 | |
| 1916 | D | 96 | 8 | 108 | |
| 1912 | D | 60 | 0 | 68 | |
| 1908 | — | — | — | — | |
| 1904 | — | — | — | — | |
| 1900 | — | — | — | — | |
| 1896 | — | — | — | — | |
| 1892 | — | — | — | — | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
This sparsely populated Permian Basin county recorded an 88-point Republican presidential margin in 2024, making it an extreme outlier even within reliably red West Texas. Its roughly 1,400 residents are spread across an oil-and-ranching landscape with no incorporated towns.
The unraveling was not abrupt. The Democratic margin in Glasscock County peaked at eighty-eight points in 1912; it narrowed steadily over the late twentieth century. The 1964 election delivered the county to the Republican party for the first time in many years, by a margin of one points. By 2024, the margin had widened further.
The economic and demographic context is severe. Glasscock County's median household income of $101,250 is among the lowest of any county in the United States; 9% of residents live below the federal poverty line. The county's voting pattern over the last decade is most similar to that of Stevens County and Wallace County.
