| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 756 | 4,101 | 4,950 | |
| 2020 | R | 816 | 3,819 | 4,742 | |
| 2016 | R | 591 | 3,052 | 3,924 | |
| 2012 | R | 833 | 2,794 | 3,724 | |
| 2008 | R | 944 | 3,024 | 4,058 | |
| 2004 | R | 685 | 2,859 | 3,590 | |
| 2000 | R | 623 | 2,450 | 3,188 | |
| 1996 | R | 895 | 2,033 | 3,323 | |
| 1992 | R | 686 | 1,469 | 3,072 | |
| 1988 | R | 848 | 1,707 | 2,634 | |
| 1984 | R | 574 | 2,141 | 2,755 | |
| 1980 | R | 732 | 2,257 | 3,140 | |
| 1976 | R | 1,054 | 1,519 | 2,641 | |
| 1972 | R | 463 | 1,630 | 2,324 | |
| 1968 | R | 562 | 1,385 | 2,323 | |
| 1964 | R | 1,168 | 1,216 | 2,384 | |
| 1960 | R | 1,129 | 1,500 | 2,629 | |
| 1956 | R | 864 | 1,468 | 2,332 | |
| 1952 | R | 759 | 1,813 | 2,575 | |
| 1948 | R | 925 | 969 | 1,937 | |
| 1944 | R | 824 | 983 | 1,819 | |
| 1940 | D | 1,160 | 1,031 | 2,205 | |
| 1936 | D | 1,106 | 500 | 1,728 | |
| 1932 | D | 959 | 583 | 1,610 | |
| 1928 | R | 533 | 918 | 1,476 | |
| 1924 | R | 309 | 564 | 1,544 | |
| 1920 | R | 515 | 971 | 1,486 | |
| 1916 | D | 775 | 594 | 1,469 | |
| 1912 | D | 567 | 515 | 1,522 | |
| 1908 | D | 650 | 604 | 1,342 | |
| 1904 | R | 393 | 663 | 1,206 | |
| 1900 | D | 884 | 584 | 1,482 | |
| 1896 | D | 1,140 | 97 | 1,237 | |
| 1892 | R | 0 | 337 | 683 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Owyhee County's high-desert ranching economy and sparse population of roughly 10,600 produce some of the most uniform partisan results in the state, with the 2024 presidential contest landing at R+67.8.
The Republican margin in Owyhee County reached its widest at sixty-eight points in 2024. The margin in 2024 was sixty-eight points, in line with the county's deep historical pattern.
Owyhee County's loyalty is rooted in its place. Median household income of $64,406, a 70% non-Hispanic-white share, and a population of 12,503 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 Gosper County and Cheyenne County.
