| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 16,928 | 31,128 | 49,628 | |
| 2020 | R | 18,451 | 31,751 | 51,641 | |
| 2016 | R | 13,453 | 26,923 | 44,560 | |
| 2012 | R | 14,953 | 23,673 | 40,238 | |
| 2008 | R | 17,412 | 22,973 | 42,049 | |
| 2004 | R | 15,214 | 26,241 | 42,275 | |
| 2000 | R | 11,864 | 22,186 | 36,733 | |
| 1996 | R | 11,113 | 16,048 | 32,111 | |
| 1992 | R | 11,007 | 13,003 | 33,559 | |
| 1988 | R | 10,646 | 15,876 | 27,272 | |
| 1984 | R | 8,539 | 19,470 | 28,062 | |
| 1980 | R | 7,116 | 16,827 | 26,336 | |
| 1976 | R | 9,061 | 10,726 | 21,110 | |
| 1972 | R | 5,090 | 9,911 | 16,927 | |
| 1968 | R | 4,351 | 8,456 | 14,671 | |
| 1964 | R | 6,857 | 6,918 | 13,801 | |
| 1960 | R | 5,419 | 7,387 | 12,831 | |
| 1956 | R | 4,863 | 7,967 | 12,830 | |
| 1952 | R | 3,353 | 8,200 | 11,655 | |
| 1948 | R | 3,290 | 5,004 | 8,588 | |
| 1944 | R | 3,214 | 4,010 | 7,355 | |
| 1940 | R | 2,888 | 3,964 | 6,932 | |
| 1936 | D | 2,840 | 1,992 | 5,955 | |
| 1932 | D | 3,060 | 1,757 | 5,198 | |
| 1928 | R | 959 | 2,625 | 3,681 | |
| 1924 | R | 650 | 1,756 | 3,257 | |
| 1920 | R | 819 | 1,606 | 2,581 | |
| 1916 | R | 1,656 | 1,660 | 3,593 | |
| 1912 | D | 702 | 305 | 2,230 | |
| 1908 | R | 732 | 967 | 2,037 | |
| 1904 | R | 327 | 914 | 1,501 | |
| 1900 | R | 744 | 919 | 1,750 | |
| 1896 | D | 1,194 | 844 | 2,096 | |
| 1892 | R | 283 | 502 | 1,349 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Josephine County, anchored by Grants Pass in the rugged Siskiyou foothills, has voted Republican by double digits in every recent presidential cycle, with its 2024 margin of R+28.6 reflecting a largely white, rural electorate well outside Oregon's Willamette Valley Democratic strongholds.
The Republican margin in Josephine County reached its widest at forty-five points in 1928. The margin in 2024 was twenty-nine points, in line with the county's deep historical pattern.
Josephine County's loyalty is rooted in its place. Median household income of $60,098, a 86% non-Hispanic-white share, and a population of 88,179 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 Ravalli County and Meagher County.