| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 1,204 | 1,757 | 3,062 | |
| 2020 | R | 1,165 | 1,741 | 2,981 | |
| 2016 | R | 832 | 1,344 | 2,429 | |
| 2012 | R | 1,094 | 1,119 | 2,313 | |
| 2008 | D | 1,121 | 1,105 | 2,294 | |
| 2004 | R | 1,021 | 1,171 | 2,235 | |
| 2000 | R | 803 | 1,033 | 1,973 | |
| 1996 | D | 924 | 619 | 1,836 | |
| 1992 | D | 696 | 488 | 1,796 | |
| 1988 | D | 961 | 629 | 1,626 | |
| 1984 | D | 930 | 776 | 1,739 | |
| 1980 | R | 751 | 828 | 1,778 | |
| 1976 | D | 942 | 704 | 1,710 | |
| 1972 | R | 796 | 818 | 1,726 | |
| 1968 | D | 899 | 641 | 1,675 | |
| 1964 | D | 1,175 | 446 | 1,624 | |
| 1960 | D | 923 | 796 | 1,722 | |
| 1956 | D | 953 | 808 | 1,767 | |
| 1952 | D | 928 | 815 | 1,760 | |
| 1948 | D | 877 | 622 | 1,597 | |
| 1944 | D | 1,003 | 532 | 1,545 | |
| 1940 | D | 1,164 | 642 | 1,825 | |
| 1936 | D | 1,098 | 419 | 1,583 | |
| 1932 | D | 730 | 442 | 1,364 | |
| 1928 | R | 382 | 578 | 975 | |
| 1924 | R | 89 | 496 | 820 | |
| 1920 | R | 164 | 494 | 857 | |
| 1916 | R | 340 | 490 | 941 | |
| 1912 | R | 185 | 282 | 884 | |
| 1908 | R | 150 | 485 | 685 | |
| 1904 | R | 101 | 473 | 649 | |
| 1900 | R | 207 | 396 | 641 | |
| 1896 | D | 396 | 290 | 689 | |
| 1892 | R | 225 | 239 | 517 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Perched along the Columbia River estuary, Wahkiakum County's roughly 3,800 residents have shifted from competitive margins in the early 2000s to an R+18 result in 2024, reflecting a broader rural realignment across the Pacific Northwest.
The Republican margin in Wahkiakum County reached its widest at fifty-seven points in 1904. The margin in 2024 was eighteen points, in line with the county's deep historical pattern.
Wahkiakum County's loyalty is rooted in its place. Median household income of $62,653, a 88% non-Hispanic-white share, and a population of 4,658 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 Skamania County and Warren County.
