| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 4,069 | 17,257 | 21,512 | |
| 2020 | R | 4,380 | 16,480 | 21,096 | |
| 2016 | R | 4,353 | 14,573 | 19,889 | |
| 2012 | R | 7,107 | 11,916 | 19,691 | |
| 2008 | R | 7,503 | 12,192 | 20,166 | |
| 2004 | R | 7,140 | 12,647 | 19,892 | |
| 2000 | R | 5,972 | 10,027 | 16,429 | |
| 1996 | R | 6,318 | 6,970 | 15,366 | |
| 1992 | R | 5,540 | 5,912 | 15,186 | |
| 1988 | R | 5,047 | 7,539 | 12,698 | |
| 1984 | R | 4,067 | 8,221 | 12,404 | |
| 1980 | R | 4,706 | 6,065 | 11,337 | |
| 1976 | D | 5,432 | 4,549 | 10,126 | |
| 1972 | R | 3,770 | 6,772 | 10,804 | |
| 1968 | R | 3,610 | 4,700 | 10,617 | |
| 1964 | D | 6,983 | 3,904 | 10,887 | |
| 1960 | R | 5,133 | 6,461 | 11,594 | |
| 1956 | R | 4,346 | 5,690 | 10,036 | |
| 1952 | R | 4,828 | 5,635 | 10,463 | |
| 1948 | D | 5,140 | 3,931 | 9,099 | |
| 1944 | R | 4,743 | 5,024 | 9,767 | |
| 1940 | D | 5,644 | 5,477 | 11,121 | |
| 1936 | D | 6,316 | 4,511 | 11,088 | |
| 1932 | D | 6,601 | 3,930 | 10,662 | |
| 1928 | R | 3,422 | 5,681 | 9,155 | |
| 1924 | D | 4,120 | 3,616 | 8,399 | |
| 1920 | D | 5,317 | 4,009 | 9,370 | |
| 1916 | D | 3,959 | 2,227 | 6,242 | |
| 1912 | D | 3,451 | 1,650 | 5,836 | |
| 1908 | D | 4,242 | 2,638 | 6,938 | |
| 1904 | D | 3,590 | 2,730 | 6,438 | |
| 1900 | D | 4,397 | 2,991 | 7,487 | |
| 1896 | D | 4,485 | 3,170 | 7,716 | |
| 1892 | D | 3,975 | 2,865 | 7,117 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Brown County's R+61.5 margin in 2024 places it among the most lopsided presidential results in Ohio, reflecting a rural Appalachian-edge electorate that has shifted decisively away from its historically Democratic roots over the past two decades.
The Republican margin in Brown County reached its widest at sixty-one points in 2024. The margin in 2024 was sixty-one points, in line with the county's deep historical pattern.
Brown County's loyalty is rooted in its place. Median household income of $71,270, a 95% non-Hispanic-white share, and a population of 43,845 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 Adams County and Washington County.
