| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 8,600 | 22,161 | 31,123 | |
| 2020 | R | 9,243 | 22,307 | 32,031 | |
| 2016 | R | 8,026 | 20,514 | 30,567 | |
| 2012 | R | 11,651 | 17,284 | 29,995 | |
| 2008 | R | 12,368 | 17,019 | 29,932 | |
| 2004 | R | 12,538 | 17,532 | 30,216 | |
| 2000 | R | 10,383 | 15,342 | 26,515 | |
| 1996 | R | 10,945 | 11,965 | 25,977 | |
| 1992 | R | 10,380 | 12,204 | 28,073 | |
| 1988 | R | 9,967 | 14,767 | 24,916 | |
| 1984 | R | 7,920 | 16,529 | 24,993 | |
| 1980 | R | 7,936 | 14,310 | 23,971 | |
| 1976 | R | 8,914 | 11,513 | 21,096 | |
| 1972 | R | 5,814 | 14,023 | 20,434 | |
| 1968 | R | 6,922 | 11,888 | 20,408 | |
| 1964 | D | 11,193 | 8,873 | 20,066 | |
| 1960 | R | 7,856 | 14,197 | 22,053 | |
| 1956 | R | 6,068 | 13,927 | 19,995 | |
| 1952 | R | 7,376 | 13,841 | 21,217 | |
| 1948 | R | 7,542 | 10,349 | 17,936 | |
| 1944 | R | 7,023 | 11,676 | 18,699 | |
| 1940 | R | 8,584 | 13,558 | 22,142 | |
| 1936 | R | 10,203 | 10,826 | 21,354 | |
| 1932 | D | 10,208 | 9,352 | 19,876 | |
| 1928 | R | 4,582 | 12,767 | 17,447 | |
| 1924 | R | 5,727 | 8,704 | 15,239 | |
| 1920 | R | 6,286 | 9,279 | 15,944 | |
| 1916 | D | 5,267 | 4,745 | 10,444 | |
| 1912 | D | 4,637 | 3,326 | 9,941 | |
| 1908 | D | 5,771 | 5,648 | 11,607 | |
| 1904 | R | 4,436 | 6,522 | 11,332 | |
| 1900 | R | 5,399 | 6,542 | 12,136 | |
| 1896 | R | 5,182 | 5,949 | 11,226 | |
| 1892 | R | 4,524 | 4,845 | 9,675 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Washington County sits in the hilly southeastern corner of Ohio, where a dwindling industrial base and strong Scots-Irish heritage have produced some of the state's most lopsided presidential margins over the past decade.
The Republican margin in Washington County reached its widest at forty-seven points in 1928. The margin in 2024 was forty-four points, in line with the county's deep historical pattern.
Washington County's loyalty is rooted in its place. Median household income of $63,603, a 94% non-Hispanic-white share, and a population of 58,978 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 Richland County and Wadena County.
