| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 1,969 | 2,545 | 4,578 | |
| 2020 | R | 2,258 | 2,461 | 4,822 | |
| 2016 | R | 1,873 | 2,077 | 4,252 | |
| 2012 | R | 1,765 | 1,976 | 3,867 | |
| 2008 | D | 1,970 | 1,855 | 3,900 | |
| 2004 | R | 1,729 | 1,980 | 3,760 | |
| 2000 | R | 1,349 | 1,867 | 3,580 | |
| 1996 | D | 1,643 | 1,438 | 3,452 | |
| 1992 | D | 1,383 | 1,127 | 3,247 | |
| 1988 | R | 1,569 | 1,708 | 3,313 | |
| 1984 | R | 1,462 | 2,066 | 3,545 | |
| 1980 | R | 1,271 | 1,496 | 2,892 | |
| 1976 | R | 1,227 | 1,368 | 2,624 | |
| 1972 | R | 904 | 1,524 | 2,446 | |
| 1968 | D | 958 | 790 | 2,091 | |
| 1964 | D | 1,251 | 635 | 1,887 | |
| 1960 | R | 716 | 736 | 1,457 | |
| 1956 | R | 479 | 837 | 1,324 | |
| 1952 | R | 609 | 1,096 | 1,705 | |
| 1948 | D | 940 | 312 | 1,341 | |
| 1944 | D | 864 | 237 | 1,186 | |
| 1940 | D | 1,001 | 245 | 1,248 | |
| 1936 | D | 828 | 151 | 981 | |
| 1932 | D | 875 | 130 | 1,010 | |
| 1928 | R | 273 | 406 | 684 | |
| 1924 | D | 366 | 113 | 500 | |
| 1920 | D | 210 | 125 | 347 | |
| 1916 | D | 207 | 43 | 258 | |
| 1912 | D | 333 | 30 | 426 | |
| 1908 | — | — | — | — | |
| 1904 | — | — | — | — | |
| 1900 | — | — | — | — | |
| 1896 | — | — | — | — | |
| 1892 | — | — | — | — | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Brewster is Texas's largest county by area yet holds fewer than 9,000 residents, a sparse ranching and tourism economy that has historically produced competitive margins before shifting toward a consistent Republican lean in recent cycles.
The Democratic margin in Brewster County has rarely exceeded seventy-four points in modern history; the Republican margin has rarely exceeded twenty-nine points. 2024 delivered the county to the Republican candidate by thirteen points.
Brewster County's demographics resemble the country more than they resemble most counties. A 69% non-Hispanic-white share, a 9% poverty rate, and a median household income of $56,212 — all within the broad national range. The county's voting pattern over the last decade is most similar to that of Klickitat County and Sanborn County.