| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 2,884 | 7,710 | 10,945 | |
| 2020 | R | 3,260 | 8,187 | 11,804 | |
| 2016 | R | 2,246 | 7,194 | 10,435 | |
| 2012 | R | 2,759 | 6,851 | 9,956 | |
| 2008 | R | 2,949 | 7,157 | 10,433 | |
| 2004 | R | 2,577 | 8,123 | 10,846 | |
| 2000 | R | 2,336 | 7,624 | 10,404 | |
| 1996 | R | 2,827 | 6,045 | 9,892 | |
| 1992 | R | 2,539 | 5,374 | 10,663 | |
| 1988 | R | 2,965 | 6,285 | 9,443 | |
| 1984 | R | 2,611 | 8,441 | 11,071 | |
| 1980 | R | 2,937 | 7,705 | 11,364 | |
| 1976 | R | 3,507 | 5,682 | 9,610 | |
| 1972 | R | 1,870 | 5,908 | 8,771 | |
| 1968 | R | 2,021 | 5,447 | 8,360 | |
| 1964 | R | 3,798 | 4,177 | 7,983 | |
| 1960 | R | 3,381 | 5,043 | 8,424 | |
| 1956 | R | 3,151 | 4,981 | 8,132 | |
| 1952 | R | 2,245 | 5,414 | 7,685 | |
| 1948 | R | 2,499 | 3,265 | 5,898 | |
| 1944 | R | 2,234 | 2,797 | 5,078 | |
| 1940 | D | 2,958 | 2,929 | 5,929 | |
| 1936 | D | 2,630 | 1,385 | 4,410 | |
| 1932 | D | 2,025 | 1,589 | 3,754 | |
| 1928 | R | 1,016 | 2,164 | 3,213 | |
| 1924 | R | 828 | 1,671 | 3,217 | |
| 1920 | R | 1,075 | 2,352 | 3,620 | |
| 1916 | D | 1,937 | 1,682 | 3,969 | |
| 1912 | D | 656 | 648 | 1,919 | |
| 1908 | R | 543 | 800 | 1,470 | |
| 1904 | R | 280 | 799 | 1,252 | |
| 1900 | D | 486 | 478 | 995 | |
| 1896 | D | 654 | 312 | 991 | |
| 1892 | D | 265 | 246 | 627 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Malheur sits in Oregon's remote southeastern corner, sharing more geography—and voting patterns—with neighboring Idaho than with the Willamette Valley. Its ranching and agricultural economy has produced some of the state's most lopsided presidential margins for decades.
The Republican margin in Malheur County reached its widest at fifty-three points in 1984. The margin in 2024 was forty-four points, in line with the county's deep historical pattern.
Malheur County's loyalty is rooted in its place. Median household income of $54,519, a 69% non-Hispanic-white share, and a population of 31,954 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 Canyon County and Buffalo County.