| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 44 | 348 | 393 | |
| 2020 | R | 45 | 377 | 427 | |
| 2016 | R | 30 | 344 | 393 | |
| 2012 | R | 42 | 360 | 408 | |
| 2008 | R | 51 | 331 | 390 | |
| 2004 | R | 60 | 378 | 444 | |
| 2000 | R | 55 | 329 | 395 | |
| 1996 | R | 64 | 303 | 429 | |
| 1992 | R | 70 | 283 | 469 | |
| 1988 | R | 81 | 383 | 466 | |
| 1984 | R | 73 | 298 | 374 | |
| 1980 | R | 65 | 306 | 402 | |
| 1976 | R | 103 | 343 | 468 | |
| 1972 | R | 73 | 397 | 470 | |
| 1968 | R | 76 | 354 | 461 | |
| 1964 | R | 212 | 319 | 531 | |
| 1960 | R | 141 | 420 | 561 | |
| 1956 | R | 121 | 422 | 543 | |
| 1952 | R | 120 | 490 | 610 | |
| 1948 | R | 238 | 312 | 550 | |
| 1944 | R | 214 | 338 | 552 | |
| 1940 | R | 277 | 486 | 763 | |
| 1936 | D | 374 | 366 | 753 | |
| 1932 | D | 437 | 262 | 721 | |
| 1928 | R | 152 | 406 | 562 | |
| 1924 | D | 216 | 206 | 581 | |
| 1920 | R | 207 | 305 | 546 | |
| 1916 | D | 261 | 244 | 533 | |
| 1912 | D | 172 | 86 | 386 | |
| 1908 | D | 130 | 95 | 234 | |
| 1904 | R | 40 | 86 | 142 | |
| 1900 | D | 80 | 65 | 149 | |
| 1896 | D | 76 | 33 | 111 | |
| 1892 | R | 35 | 36 | 94 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Thomas County's 729 residents live across a sparsely settled stretch of Nebraska Sandhills, and in 2024 its presidential vote broke roughly 88–11 in favor of the Republican nominee — a margin wider than nearly any county in the country.
The Republican margin in Thomas County reached its widest at eighty points in 2016. The margin in 2024 was seventy-seven points, in line with the county's deep historical pattern.
Thomas County's loyalty is rooted in its place. Median household income of $65,000, a 89% non-Hispanic-white share, and a population of 564 together describe a community whose political habits are deeply settled. The county's voting pattern over the last decade is most similar to that of Baldwin County and Sheridan County.
