| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 5,145 | 25,586 | 31,095 | |
| 2020 | R | 5,199 | 22,259 | 28,087 | |
| 2016 | R | 4,216 | 18,562 | 23,583 | |
| 2012 | R | 6,225 | 17,245 | 23,887 | |
| 2008 | R | 7,110 | 17,151 | 24,670 | |
| 2004 | R | 7,635 | 16,382 | 24,194 | |
| 2000 | R | 7,909 | 12,540 | 20,816 | |
| 1996 | R | 6,885 | 9,779 | 18,416 | |
| 1992 | R | 7,857 | 9,912 | 20,875 | |
| 1988 | R | 5,077 | 11,947 | 17,132 | |
| 1984 | R | 4,763 | 13,215 | 18,065 | |
| 1980 | R | 5,822 | 10,704 | 16,956 | |
| 1976 | R | 7,070 | 8,664 | 15,880 | |
| 1972 | R | 2,764 | 9,772 | 12,709 | |
| 1968 | R | 2,947 | 7,957 | 13,657 | |
| 1964 | R | 5,916 | 6,913 | 12,829 | |
| 1960 | R | 4,406 | 8,835 | 13,276 | |
| 1956 | R | 3,949 | 7,396 | 11,402 | |
| 1952 | R | 3,656 | 6,864 | 10,563 | |
| 1948 | R | 3,282 | 4,375 | 7,875 | |
| 1944 | R | 2,726 | 4,922 | 7,665 | |
| 1940 | R | 4,406 | 4,587 | 9,135 | |
| 1936 | D | 4,708 | 4,313 | 9,057 | |
| 1932 | D | 4,264 | 3,223 | 7,532 | |
| 1928 | R | 2,295 | 3,599 | 5,894 | |
| 1924 | R | 2,586 | 3,282 | 5,897 | |
| 1920 | R | 2,924 | 5,677 | 8,606 | |
| 1916 | R | 2,254 | 3,055 | 5,309 | |
| 1912 | D | 2,076 | 1,650 | 4,973 | |
| 1908 | R | 1,886 | 2,027 | 3,923 | |
| 1904 | D | 2,128 | 2,036 | 4,191 | |
| 1900 | R | 2,868 | 3,091 | 5,989 | |
| 1896 | R | 2,726 | 3,577 | 6,364 | |
| 1892 | R | 2,299 | 2,745 | 5,354 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Nestled in the upper East Tennessee mountains, Greene County delivered a 65-point Republican presidential margin in 2024, reflecting the region's decades-long shift from Yellow Dog Democrat territory to one of the most reliably Republican corners of Appalachia.
The Republican margin in Greene County reached its widest at sixty-six points in 2024. The margin in 2024 was sixty-six points, in line with the county's deep historical pattern.
Greene County's loyalty is rooted in its place. Median household income of $56,194, a 91% non-Hispanic-white share, and a population of 71,628 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 Hamblen County and Jefferson County.