| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 666 | 2,381 | 3,091 | |
| 2020 | R | 668 | 2,054 | 2,744 | |
| 2016 | R | 686 | 2,118 | 2,921 | |
| 2012 | R | 994 | 1,759 | 2,819 | |
| 2008 | R | 1,158 | 1,713 | 2,918 | |
| 2004 | R | 1,139 | 1,796 | 2,958 | |
| 2000 | R | 951 | 1,515 | 2,492 | |
| 1996 | R | 1,083 | 1,098 | 2,474 | |
| 1992 | R | 970 | 1,009 | 2,514 | |
| 1988 | R | 1,113 | 1,412 | 2,531 | |
| 1984 | R | 1,068 | 1,503 | 2,577 | |
| 1980 | R | 1,074 | 1,264 | 2,420 | |
| 1976 | D | 1,300 | 1,027 | 2,337 | |
| 1972 | R | 922 | 1,368 | 2,299 | |
| 1968 | R | 991 | 1,053 | 2,287 | |
| 1964 | D | 1,397 | 905 | 2,308 | |
| 1960 | R | 1,015 | 1,314 | 2,336 | |
| 1956 | R | 1,087 | 1,237 | 2,331 | |
| 1952 | R | 1,119 | 1,219 | 2,348 | |
| 1948 | D | 1,173 | 1,031 | 2,215 | |
| 1944 | R | 1,043 | 1,126 | 2,184 | |
| 1940 | D | 1,210 | 1,186 | 2,404 | |
| 1936 | D | 1,362 | 1,022 | 2,384 | |
| 1932 | D | 1,288 | 997 | 2,305 | |
| 1928 | R | 911 | 1,230 | 2,154 | |
| 1924 | D | 1,058 | 989 | 2,105 | |
| 1920 | R | 1,097 | 1,177 | 2,312 | |
| 1916 | D | 632 | 597 | 1,258 | |
| 1912 | D | 553 | 406 | 1,127 | |
| 1908 | D | 622 | 619 | 1,260 | |
| 1904 | R | 584 | 962 | 1,586 | |
| 1900 | R | 632 | 730 | 1,371 | |
| 1896 | R | 634 | 705 | 1,340 | |
| 1892 | R | 606 | 662 | 1,280 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Ohio County, Indiana—not to be confused with the state—is a compact rural enclave along the Ohio River whose roughly 5,600 residents have delivered some of the widest presidential margins in the state, reaching R+55.5 in 2024.
The Republican margin in Ohio County reached its widest at fifty-five points in 2024. The margin in 2024 was fifty-five points, in line with the county's deep historical pattern.
Ohio County's loyalty is rooted in its place. Median household income of $70,392, a 95% non-Hispanic-white share, and a population of 5,999 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 Pendleton County and Carter County.
