| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 8,466 | 11,555 | 20,731 | |
| 2020 | R | 8,900 | 11,840 | 21,282 | |
| 2016 | R | 6,298 | 9,610 | 17,556 | |
| 2012 | R | 7,108 | 9,221 | 17,003 | |
| 2008 | R | 7,613 | 8,798 | 16,870 | |
| 2004 | R | 6,309 | 9,636 | 16,342 | |
| 2000 | R | 4,335 | 9,384 | 14,798 | |
| 1996 | R | 4,810 | 5,890 | 13,075 | |
| 1992 | D | 5,015 | 4,265 | 13,033 | |
| 1988 | R | 5,630 | 5,856 | 11,740 | |
| 1984 | R | 5,330 | 7,476 | 13,059 | |
| 1980 | R | 4,634 | 6,460 | 12,493 | |
| 1976 | D | 5,543 | 5,455 | 11,595 | |
| 1972 | R | 3,835 | 5,796 | 10,334 | |
| 1968 | R | 4,379 | 4,490 | 9,935 | |
| 1964 | D | 6,554 | 3,931 | 10,495 | |
| 1960 | D | 5,507 | 5,169 | 10,698 | |
| 1956 | R | 5,298 | 5,448 | 10,754 | |
| 1952 | R | 4,817 | 6,085 | 10,950 | |
| 1948 | D | 5,644 | 4,083 | 9,935 | |
| 1944 | D | 4,642 | 4,084 | 8,764 | |
| 1940 | D | 5,362 | 4,244 | 9,655 | |
| 1936 | D | 5,622 | 2,367 | 8,667 | |
| 1932 | D | 3,969 | 2,277 | 6,947 | |
| 1928 | R | 1,722 | 3,245 | 5,003 | |
| 1924 | R | 721 | 2,531 | 5,021 | |
| 1920 | R | 1,260 | 2,784 | 5,064 | |
| 1916 | D | 2,924 | 1,896 | 5,334 | |
| 1912 | D | 1,461 | 804 | 4,239 | |
| 1908 | R | 1,074 | 1,368 | 2,779 | |
| 1904 | R | 435 | 1,192 | 1,789 | |
| 1900 | D | 714 | 457 | 1,200 | |
| 1896 | D | 950 | 284 | 1,250 | |
| 1892 | R | 425 | 577 | 1,153 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Okanogan County stretches across Washington's arid northeastern highlands, where a sparse, rural population anchored in agriculture and timber has delivered double-digit Republican presidential margins in every cycle since 2000.
The Republican margin in Okanogan County reached its widest at forty-two points in 1904. The margin in 2024 was fifteen points, in line with the county's deep historical pattern.
Okanogan County's loyalty is rooted in its place. Median household income of $63,207, a 64% non-Hispanic-white share, and a population of 43,425 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 Siskiyou County and Plumas County.
