| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 1,455 | 3,767 | 5,365 | |
| 2020 | R | 1,814 | 3,907 | 5,862 | |
| 2016 | R | 1,299 | 3,083 | 4,782 | |
| 2012 | R | 1,540 | 3,171 | 4,822 | |
| 2008 | R | 1,552 | 3,222 | 4,858 | |
| 2004 | R | 1,315 | 3,751 | 5,127 | |
| 2000 | R | 1,406 | 3,440 | 4,974 | |
| 1996 | R | 1,740 | 2,356 | 4,614 | |
| 1992 | R | 1,449 | 2,087 | 4,585 | |
| 1988 | R | 1,612 | 2,612 | 4,288 | |
| 1984 | R | 1,311 | 3,449 | 4,809 | |
| 1980 | R | 1,223 | 3,248 | 4,776 | |
| 1976 | R | 1,790 | 2,795 | 4,773 | |
| 1972 | R | 1,110 | 3,083 | 4,519 | |
| 1968 | R | 1,270 | 2,572 | 4,141 | |
| 1964 | R | 2,027 | 2,241 | 4,273 | |
| 1960 | R | 1,732 | 2,479 | 4,216 | |
| 1956 | R | 1,673 | 2,267 | 3,944 | |
| 1952 | R | 1,104 | 2,181 | 3,290 | |
| 1948 | R | 1,267 | 1,394 | 2,683 | |
| 1944 | R | 1,062 | 1,666 | 2,740 | |
| 1940 | R | 1,397 | 1,508 | 2,918 | |
| 1936 | D | 1,944 | 657 | 2,661 | |
| 1932 | D | 1,504 | 867 | 2,430 | |
| 1928 | R | 807 | 1,473 | 2,299 | |
| 1924 | R | 228 | 760 | 2,026 | |
| 1920 | R | 515 | 1,525 | 2,271 | |
| 1916 | D | 1,294 | 1,237 | 2,673 | |
| 1912 | D | 949 | 398 | 2,338 | |
| 1908 | R | 714 | 1,033 | 1,851 | |
| 1904 | R | 548 | 1,138 | 1,766 | |
| 1900 | D | 523 | 461 | 1,025 | |
| 1896 | D | 372 | 243 | 626 | |
| 1892 | R | 139 | 244 | 570 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Adams County's wheat-farming economy and sparse rural population anchor one of the most lopsided presidential results in Washington state, with Republicans carrying it by more than 43 points in 2024.
The Republican margin in Adams County reached its widest at forty-eight points in 2004. The margin in 2024 was forty-three points, in line with the county's deep historical pattern.
Adams County's loyalty is rooted in its place. Median household income of $66,136, a 43% non-Hispanic-white share, and a population of 20,800 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 Grant County and Jerome County.
