| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 233 | 890 | 1,163 | |
| 2020 | R | 260 | 921 | 1,208 | |
| 2016 | R | 202 | 732 | 1,017 | |
| 2012 | R | 319 | 678 | 1,026 | |
| 2008 | R | 385 | 634 | 1,047 | |
| 2004 | R | 390 | 694 | 1,104 | |
| 2000 | R | 326 | 679 | 1,062 | |
| 1996 | R | 444 | 476 | 1,067 | |
| 1992 | R | 362 | 424 | 1,116 | |
| 1988 | R | 435 | 555 | 1,016 | |
| 1984 | R | 398 | 828 | 1,227 | |
| 1980 | R | 389 | 677 | 1,170 | |
| 1976 | R | 491 | 567 | 1,109 | |
| 1972 | R | 330 | 677 | 1,043 | |
| 1968 | R | 384 | 646 | 1,089 | |
| 1964 | D | 859 | 494 | 1,353 | |
| 1960 | R | 506 | 659 | 1,165 | |
| 1956 | R | 420 | 671 | 1,091 | |
| 1952 | R | 355 | 747 | 1,107 | |
| 1948 | R | 454 | 532 | 1,000 | |
| 1944 | D | 518 | 475 | 996 | |
| 1940 | D | 670 | 575 | 1,248 | |
| 1936 | D | 823 | 337 | 1,213 | |
| 1932 | D | 665 | 423 | 1,112 | |
| 1928 | R | 375 | 759 | 1,144 | |
| 1924 | R | 367 | 756 | 1,352 | |
| 1920 | R | 423 | 893 | 1,362 | |
| 1916 | D | 747 | 717 | 1,530 | |
| 1912 | R | 232 | 244 | 700 | |
| 1908 | R | 252 | 437 | 750 | |
| 1904 | R | 163 | 701 | 986 | |
| 1900 | R | 385 | 451 | 927 | |
| 1896 | R | 414 | 426 | 885 | |
| 1892 | R | 110 | 289 | 624 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Sherman County's sparse Columbia Plateau wheat-farming communities have delivered lopsided Republican presidential margins for decades, with 2024's R+56.5 result reflecting a rural electorate of fewer than 2,000 residents where agriculture shapes both livelihood and political outlook.
The Democratic margin in Sherman County peaked at forty points in 1936. By 1968 the county had flipped, voting Republican for the first time in many years. The 2024 margin was fifty-six points, the most Republican-leaning result in the county's modern history.
The economic context is the key. Sherman County's median household income of $60,161 sits well below state and national norms, and 22% 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 Wells County and Burke County.