| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 661 | 1,737 | 2,485 | |
| 2020 | R | 668 | 1,754 | 2,495 | |
| 2016 | R | 526 | 1,497 | 2,229 | |
| 2012 | R | 645 | 1,568 | 2,280 | |
| 2008 | R | 686 | 1,499 | 2,228 | |
| 2004 | R | 605 | 1,470 | 2,107 | |
| 2000 | R | 515 | 1,523 | 2,107 | |
| 1996 | R | 743 | 948 | 1,955 | |
| 1992 | R | 668 | 761 | 1,914 | |
| 1988 | R | 730 | 1,172 | 1,944 | |
| 1984 | R | 673 | 1,404 | 2,095 | |
| 1980 | R | 587 | 1,349 | 2,086 | |
| 1976 | R | 829 | 1,153 | 2,034 | |
| 1972 | R | 533 | 1,445 | 2,080 | |
| 1968 | R | 754 | 1,221 | 2,152 | |
| 1964 | D | 1,138 | 1,048 | 2,187 | |
| 1960 | R | 793 | 1,301 | 2,094 | |
| 1956 | R | 739 | 1,423 | 2,162 | |
| 1952 | R | 765 | 1,511 | 2,283 | |
| 1948 | R | 1,015 | 1,062 | 2,112 | |
| 1944 | R | 1,039 | 1,211 | 2,270 | |
| 1940 | R | 1,218 | 1,461 | 2,685 | |
| 1936 | D | 1,391 | 807 | 2,412 | |
| 1932 | D | 1,491 | 714 | 2,298 | |
| 1928 | R | 689 | 1,328 | 2,041 | |
| 1924 | R | 522 | 1,122 | 2,153 | |
| 1920 | R | 662 | 1,376 | 2,144 | |
| 1916 | D | 1,164 | 1,148 | 2,447 | |
| 1912 | D | 855 | 673 | 2,564 | |
| 1908 | R | 585 | 887 | 1,545 | |
| 1904 | R | 482 | 1,089 | 1,657 | |
| 1900 | R | 706 | 899 | 1,643 | |
| 1896 | D | 862 | 776 | 1,651 | |
| 1892 | D | 672 | 615 | 1,565 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Columbia County, a sparsely populated wheat-farming county in Washington's southeastern corner, has delivered Republican presidential margins exceeding 40 points in recent cycles, making it among the state's most lopsided counties by vote share.
The Democratic margin in Columbia County peaked at thirty-four points in 1932. By 1968 the county had flipped, voting Republican for the first time in many years. The 2024 margin was forty-three points, the most Republican-leaning result in the county's modern history.
The economic context is the key. Columbia County's median household income of $71,810 sits well below state and national norms, and 9% of residents live below the federal poverty line. The shift here is part of a broader realignment of working-class places across the country. The county's voting pattern over the last decade is most similar to that of Fremont County and Modoc County.
