| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 4,592 | 12,319 | 17,236 | |
| 2020 | R | 4,911 | 12,579 | 17,669 | |
| 2016 | R | 4,482 | 10,849 | 15,868 | |
| 2012 | R | 5,852 | 8,428 | 14,546 | |
| 2008 | R | 7,829 | 7,889 | 15,976 | |
| 2004 | R | 7,674 | 7,786 | 15,565 | |
| 2000 | D | 7,230 | 5,890 | 13,653 | |
| 1996 | D | 7,620 | 4,002 | 13,736 | |
| 1992 | D | 8,438 | 3,482 | 15,135 | |
| 1988 | D | 9,126 | 4,879 | 14,095 | |
| 1984 | D | 9,365 | 6,376 | 15,784 | |
| 1980 | D | 8,193 | 5,336 | 14,121 | |
| 1976 | D | 8,769 | 5,293 | 14,219 | |
| 1972 | R | 5,562 | 7,790 | 13,543 | |
| 1968 | D | 8,198 | 5,099 | 14,401 | |
| 1964 | D | 11,412 | 3,896 | 15,327 | |
| 1960 | D | 9,645 | 7,498 | 17,159 | |
| 1956 | D | 9,827 | 7,562 | 17,403 | |
| 1952 | D | 10,125 | 6,964 | 17,119 | |
| 1948 | D | 8,015 | 4,717 | 12,934 | |
| 1944 | D | 8,392 | 5,747 | 14,192 | |
| 1940 | D | 10,214 | 6,726 | 16,976 | |
| 1936 | D | 12,006 | 6,359 | 18,474 | |
| 1932 | D | 9,322 | 4,808 | 14,388 | |
| 1928 | R | 5,293 | 6,910 | 12,299 | |
| 1924 | D | 5,874 | 4,590 | 10,976 | |
| 1920 | D | 5,592 | 4,253 | 10,028 | |
| 1916 | D | 3,930 | 2,096 | 6,177 | |
| 1912 | D | 3,551 | 1,150 | 6,052 | |
| 1908 | D | 3,793 | 2,438 | 6,550 | |
| 1904 | D | 3,198 | 2,442 | 5,910 | |
| 1900 | D | 3,674 | 2,427 | 6,220 | |
| 1896 | D | 4,198 | 2,453 | 6,737 | |
| 1892 | D | 3,977 | 2,126 | 6,367 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Greene County, tucked into Pennsylvania's southwestern corner, has shifted dramatically over the past two decades from a union-heavy Democratic stronghold into one of the state's most reliably one-sided presidential counties, reflecting broader realignment across Appalachian coal country.
The unraveling was not abrupt. The Democratic margin in Greene County peaked at forty-nine points in 1964; it narrowed steadily over the late twentieth century. The 2004 election delivered the county to the Republican party for the first time in many years, by a margin of one points. By 2024, the margin had widened further.
The economic and demographic context is severe. Greene County's median household income of $68,041 is among the lowest of any county in the United States; 14% of residents live below the federal poverty line. The county's voting pattern over the last decade is most similar to that of Braxton County and Lawrence County.