| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 1,564 | 5,892 | 7,562 | |
| 2020 | R | 1,641 | 6,115 | 7,921 | |
| 2016 | R | 1,448 | 5,571 | 7,438 | |
| 2012 | R | 2,450 | 4,792 | 7,435 | |
| 2008 | R | 3,342 | 4,473 | 7,932 | |
| 2004 | R | 2,986 | 5,072 | 8,104 | |
| 2000 | R | 2,638 | 4,353 | 7,138 | |
| 1996 | R | 2,744 | 3,339 | 6,927 | |
| 1992 | R | 2,986 | 3,003 | 7,555 | |
| 1988 | R | 2,689 | 4,127 | 6,874 | |
| 1984 | R | 2,363 | 5,129 | 7,516 | |
| 1980 | R | 2,158 | 5,354 | 7,762 | |
| 1976 | R | 3,222 | 4,485 | 7,844 | |
| 1972 | R | 2,327 | 5,179 | 7,522 | |
| 1968 | R | 2,093 | 4,793 | 7,569 | |
| 1964 | R | 3,670 | 3,840 | 7,510 | |
| 1960 | R | 3,093 | 5,053 | 8,157 | |
| 1956 | R | 2,820 | 5,299 | 8,135 | |
| 1952 | R | 2,824 | 5,546 | 8,381 | |
| 1948 | R | 2,737 | 4,544 | 7,330 | |
| 1944 | R | 2,723 | 5,428 | 8,186 | |
| 1940 | R | 3,479 | 5,701 | 9,222 | |
| 1936 | R | 4,119 | 4,540 | 8,868 | |
| 1932 | D | 4,696 | 3,076 | 7,926 | |
| 1928 | R | 2,848 | 3,638 | 6,508 | |
| 1924 | R | 1,717 | 3,444 | 6,103 | |
| 1920 | R | 1,102 | 4,519 | 6,386 | |
| 1916 | R | 2,794 | 4,657 | 7,641 | |
| 1912 | D | 1,654 | 1,304 | 4,234 | |
| 1908 | R | 1,830 | 2,355 | 4,372 | |
| 1904 | R | 1,504 | 2,374 | 4,143 | |
| 1900 | R | 2,081 | 2,351 | 4,538 | |
| 1896 | R | 1,979 | 2,351 | 4,411 | |
| 1892 | R | 1,868 | 1,956 | 4,131 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Washington County's 2024 presidential margin of R+57.2 places it among the state's most lopsided rural counties, reflecting a broader realignment of small downstate communities away from competitive voting patterns over the past two decades.
The Republican margin in Washington County reached its widest at fifty-seven points in 2024. The margin in 2024 was fifty-seven points, in line with the county's deep historical pattern.
Washington County's loyalty is rooted in its place. Median household income of $78,224, a 95% non-Hispanic-white share, and a population of 13,627 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 Crawford County and Ozark County.
