| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 91 | 314 | 405 | |
| 2020 | R | 119 | 334 | 458 | |
| 2016 | R | 140 | 288 | 438 | |
| 2012 | R | 184 | 358 | 555 | |
| 2008 | R | 186 | 323 | 519 | |
| 2004 | R | 159 | 306 | 469 | |
| 2000 | R | 219 | 243 | 477 | |
| 1996 | D | 278 | 185 | 519 | |
| 1992 | D | 325 | 176 | 631 | |
| 1988 | D | 390 | 296 | 689 | |
| 1984 | R | 289 | 407 | 698 | |
| 1980 | R | 260 | 411 | 686 | |
| 1976 | D | 321 | 317 | 642 | |
| 1972 | R | 124 | 467 | 591 | |
| 1968 | R | 201 | 250 | 601 | |
| 1964 | D | 364 | 294 | 658 | |
| 1960 | D | 352 | 291 | 646 | |
| 1956 | R | 217 | 350 | 569 | |
| 1952 | R | 295 | 426 | 722 | |
| 1948 | D | 171 | 78 | 263 | |
| 1944 | D | 329 | 156 | 504 | |
| 1940 | D | 417 | 133 | 550 | |
| 1936 | D | 324 | 84 | 408 | |
| 1932 | D | 479 | 133 | 613 | |
| 1928 | R | 85 | 364 | 451 | |
| 1924 | R | 109 | 122 | 316 | |
| 1920 | D | 155 | 95 | 268 | |
| 1916 | D | 181 | 59 | 242 | |
| 1912 | D | 118 | 36 | 197 | |
| 1908 | — | — | — | — | |
| 1904 | — | — | — | — | |
| 1900 | — | — | — | — | |
| 1896 | — | — | — | — | |
| 1892 | — | — | — | — | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Terrell County sits along the Rio Grande in far west Texas with roughly 1,000 residents spread across nearly 2,400 square miles. Its sparse ranching economy has long produced lopsided Republican margins, hitting R+55 in 2024.
The Democratic margin in Terrell County peaked at fifty-nine points in 1936. By 2000 the county had flipped, voting Republican for the first time in many years. The 2024 margin was fifty-five points, the most Republican-leaning result in the county's modern history.
The economic context is the key. Terrell County's median household income of $44,886 sits well below state and national norms, and 8% of residents live below the federal poverty line. The shift here is part of a broader realignment of working-class places across the country. The county's voting pattern over the last decade is most similar to that of Harmon County and Falls County.