| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 4,082 | 7,004 | 11,468 | |
| 2020 | R | 4,250 | 7,319 | 11,951 | |
| 2016 | R | 3,134 | 5,741 | 9,974 | |
| 2012 | R | 4,003 | 5,654 | 9,972 | |
| 2008 | R | 4,139 | 5,451 | 9,780 | |
| 2004 | R | 3,319 | 5,320 | 8,786 | |
| 2000 | R | 2,736 | 4,909 | 7,985 | |
| 1996 | D | 3,349 | 2,860 | 7,311 | |
| 1992 | D | 3,239 | 2,425 | 7,596 | |
| 1988 | D | 3,422 | 2,874 | 6,384 | |
| 1984 | R | 3,042 | 3,876 | 7,021 | |
| 1980 | R | 2,724 | 3,275 | 6,659 | |
| 1976 | D | 2,898 | 2,752 | 5,828 | |
| 1972 | R | 2,559 | 2,911 | 5,780 | |
| 1968 | D | 2,693 | 2,307 | 5,434 | |
| 1964 | D | 3,657 | 1,777 | 5,436 | |
| 1960 | D | 3,093 | 2,640 | 5,739 | |
| 1956 | R | 2,586 | 2,608 | 5,200 | |
| 1952 | R | 2,160 | 2,722 | 4,894 | |
| 1948 | D | 2,054 | 1,384 | 3,583 | |
| 1944 | D | 1,888 | 1,367 | 3,270 | |
| 1940 | D | 2,107 | 1,483 | 3,611 | |
| 1936 | D | 2,261 | 916 | 3,443 | |
| 1932 | D | 1,994 | 960 | 3,052 | |
| 1928 | R | 776 | 1,812 | 2,612 | |
| 1924 | R | 508 | 1,094 | 2,352 | |
| 1920 | R | 497 | 1,210 | 1,866 | |
| 1916 | D | 1,136 | 1,004 | 2,338 | |
| 1912 | R | 551 | 579 | 1,845 | |
| 1908 | R | 365 | 648 | 1,087 | |
| 1904 | R | 227 | 747 | 1,029 | |
| 1900 | R | 328 | 398 | 760 | |
| 1896 | D | 269 | 214 | 487 | |
| 1892 | R | 143 | 194 | 369 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Asotin sits at Washington's southeastern corner along the Snake River, where a rural, agriculture-rooted electorate has delivered consistent double-digit Republican presidential margins for over two decades.
The Democratic margin in Asotin County peaked at thirty-nine points in 1936. By 2000 the county had flipped, voting Republican for the first time in many years. The 2024 margin was twenty-five points, the most Republican-leaning result in the county's modern history.
The economic context is the key. Asotin County's median household income of $72,283 sits well below state and national norms, and 14% 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 Nez Perce County and Mineral County.