| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 54,065 | 61,743 | 119,572 | |
| 2020 | R | 59,478 | 63,869 | 127,165 | |
| 2016 | R | 44,447 | 53,870 | 109,327 | |
| 2012 | R | 44,468 | 49,020 | 97,127 | |
| 2008 | D | 49,090 | 49,043 | 101,047 | |
| 2004 | R | 44,366 | 56,519 | 102,189 | |
| 2000 | R | 33,153 | 46,052 | 84,796 | |
| 1996 | R | 29,230 | 33,771 | 73,647 | |
| 1992 | D | 29,146 | 28,704 | 77,096 | |
| 1988 | R | 28,028 | 32,516 | 61,912 | |
| 1984 | R | 23,230 | 37,895 | 61,359 | |
| 1980 | R | 19,903 | 32,879 | 58,740 | |
| 1976 | R | 23,384 | 24,237 | 50,236 | |
| 1972 | R | 14,529 | 24,003 | 41,561 | |
| 1968 | R | 12,714 | 19,577 | 34,842 | |
| 1964 | D | 19,486 | 14,598 | 34,084 | |
| 1960 | R | 14,531 | 17,554 | 32,157 | |
| 1956 | R | 12,733 | 17,201 | 29,934 | |
| 1952 | R | 8,674 | 18,279 | 27,060 | |
| 1948 | R | 7,342 | 11,226 | 19,072 | |
| 1944 | R | 6,668 | 8,598 | 15,426 | |
| 1940 | R | 6,754 | 8,507 | 15,339 | |
| 1936 | D | 7,520 | 4,866 | 13,914 | |
| 1932 | D | 7,519 | 5,459 | 13,639 | |
| 1928 | R | 2,463 | 8,053 | 10,676 | |
| 1924 | R | 1,840 | 4,868 | 9,141 | |
| 1920 | R | 2,503 | 4,382 | 7,326 | |
| 1916 | D | 4,874 | 3,538 | 8,978 | |
| 1912 | D | 2,079 | 847 | 5,243 | |
| 1908 | R | 1,537 | 2,032 | 4,057 | |
| 1904 | R | 798 | 1,992 | 3,257 | |
| 1900 | R | 1,525 | 1,565 | 3,249 | |
| 1896 | D | 2,354 | 1,387 | 3,788 | |
| 1892 | R | 466 | 959 | 2,737 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Home to Medford and Ashland, Jackson County blends rural timber communities with a small college-town liberal enclave, producing a competitive-to-Republican lean that has tightened by roughly 10 points over the past three election cycles.
The Democratic margin in Jackson County has rarely exceeded twenty-six points in modern history; the Republican margin has rarely exceeded fifty-two points. 2024 delivered the county to the Republican candidate by six points.
Jackson County's demographics resemble the country more than they resemble most counties. A 81% non-Hispanic-white share, a 12% poverty rate, and a median household income of $73,999 — all within the broad national range. The county's voting pattern over the last decade is most similar to that of Yamhill County and Polk County.