| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 3,609 | 16,269 | 20,005 | |
| 2020 | R | 3,799 | 15,678 | 19,676 | |
| 2016 | R | 3,773 | 14,020 | 18,769 | |
| 2012 | R | 6,054 | 11,413 | 18,040 | |
| 2008 | R | 6,856 | 11,907 | 19,231 | |
| 2004 | R | 6,194 | 12,211 | 18,481 | |
| 2000 | R | 5,328 | 9,728 | 15,447 | |
| 1996 | R | 5,837 | 7,102 | 14,674 | |
| 1992 | R | 4,866 | 7,020 | 15,242 | |
| 1988 | R | 4,278 | 8,776 | 13,178 | |
| 1984 | R | 3,784 | 9,000 | 12,875 | |
| 1980 | R | 4,363 | 7,359 | 12,400 | |
| 1976 | R | 6,327 | 6,853 | 13,331 | |
| 1972 | R | 3,464 | 8,524 | 12,226 | |
| 1968 | R | 3,828 | 6,489 | 12,525 | |
| 1964 | D | 7,281 | 5,985 | 13,266 | |
| 1960 | R | 5,423 | 8,948 | 14,371 | |
| 1956 | R | 4,826 | 8,397 | 13,223 | |
| 1952 | R | 5,219 | 8,568 | 13,787 | |
| 1948 | R | 5,675 | 6,849 | 12,540 | |
| 1944 | R | 5,336 | 7,963 | 13,299 | |
| 1940 | R | 6,921 | 8,530 | 15,451 | |
| 1936 | D | 8,011 | 7,392 | 15,451 | |
| 1932 | D | 7,079 | 6,924 | 14,137 | |
| 1928 | R | 3,836 | 8,325 | 12,221 | |
| 1924 | R | 4,583 | 6,845 | 11,976 | |
| 1920 | R | 5,654 | 7,570 | 13,267 | |
| 1916 | D | 3,964 | 3,727 | 7,796 | |
| 1912 | D | 3,314 | 2,757 | 7,459 | |
| 1908 | R | 3,823 | 4,149 | 8,098 | |
| 1904 | R | 3,321 | 4,205 | 7,787 | |
| 1900 | R | 3,938 | 4,078 | 8,234 | |
| 1896 | R | 3,909 | 4,106 | 8,159 | |
| 1892 | R | 3,153 | 3,496 | 7,114 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Highland County's R+63.3 margin in 2024 places it among Ohio's most lopsided presidential counties, driven by a rural, majority-white population with deep roots in small-scale agriculture and limited urban influence.
The Republican margin in Highland County reached its widest at sixty-three points in 2024. The margin in 2024 was sixty-three points, in line with the county's deep historical pattern.
Highland County's loyalty is rooted in its place. Median household income of $65,785, a 95% non-Hispanic-white share, and a population of 43,517 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 Morrow County and Hardin County.
