| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 35,575 | 53,399 | 90,707 | |
| 2020 | R | 34,798 | 52,072 | 88,643 | |
| 2016 | R | 28,943 | 48,540 | 83,701 | |
| 2012 | R | 32,256 | 49,819 | 84,109 | |
| 2008 | R | 33,540 | 48,936 | 83,729 | |
| 2004 | R | 30,531 | 48,388 | 79,282 | |
| 2000 | R | 25,059 | 37,946 | 65,204 | |
| 1996 | R | 25,082 | 30,677 | 61,782 | |
| 1992 | R | 20,139 | 27,651 | 59,502 | |
| 1988 | R | 18,025 | 34,432 | 52,856 | |
| 1984 | R | 17,129 | 34,267 | 51,712 | |
| 1980 | R | 20,068 | 24,922 | 48,842 | |
| 1976 | R | 20,245 | 22,598 | 44,077 | |
| 1972 | R | 12,736 | 25,349 | 38,909 | |
| 1968 | R | 15,178 | 17,589 | 38,775 | |
| 1964 | D | 21,276 | 14,571 | 35,847 | |
| 1960 | R | 14,155 | 19,642 | 33,797 | |
| 1956 | R | 9,861 | 15,471 | 25,332 | |
| 1952 | R | 9,123 | 12,900 | 22,023 | |
| 1948 | R | 8,970 | 9,186 | 18,300 | |
| 1944 | R | 7,937 | 9,680 | 17,617 | |
| 1940 | R | 8,881 | 9,273 | 18,154 | |
| 1936 | D | 8,946 | 7,449 | 16,712 | |
| 1932 | R | 6,600 | 8,455 | 15,481 | |
| 1928 | R | 3,385 | 10,030 | 13,528 | |
| 1924 | R | 2,471 | 8,410 | 11,523 | |
| 1920 | R | 4,016 | 8,600 | 12,788 | |
| 1916 | R | 2,913 | 4,458 | 7,695 | |
| 1912 | R | 2,107 | 3,242 | 7,043 | |
| 1908 | R | 2,882 | 4,902 | 8,151 | |
| 1904 | R | 2,004 | 5,043 | 7,484 | |
| 1900 | R | 2,743 | 5,100 | 8,102 | |
| 1896 | R | 3,003 | 5,296 | 8,472 | |
| 1892 | R | 2,442 | 4,210 | 7,127 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Home to Wright-Patterson Air Force Base and Cedarville University, Greene County pairs a substantial federal-civilian workforce with a conservative-leaning electorate that has backed Republican presidential candidates by double digits for over two decades.
The Republican margin in Greene County reached its widest at fifty-two points in 1924. The margin in 2024 was twenty points, in line with the county's deep historical pattern.
Greene County's loyalty is rooted in its place. Median household income of $87,309, a 82% non-Hispanic-white share, and a population of 169,688 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 Harrison County and Butler County.