| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 50,710 | 103,032 | 155,597 | |
| 2020 | R | 52,926 | 93,560 | 148,655 | |
| 2016 | R | 39,997 | 76,277 | 121,090 | |
| 2012 | R | 41,461 | 66,969 | 109,906 | |
| 2008 | R | 41,632 | 65,042 | 108,328 | |
| 2004 | R | 33,633 | 62,004 | 96,758 | |
| 2000 | R | 29,559 | 52,114 | 83,553 | |
| 1996 | R | 26,814 | 35,972 | 67,196 | |
| 1992 | R | 25,488 | 37,707 | 72,635 | |
| 1988 | R | 22,964 | 40,801 | 64,568 | |
| 1984 | R | 20,130 | 41,553 | 62,575 | |
| 1980 | R | 27,245 | 30,092 | 58,869 | |
| 1976 | D | 27,925 | 20,456 | 48,717 | |
| 1972 | R | 9,586 | 31,308 | 41,556 | |
| 1968 | R | 11,467 | 18,183 | 46,996 | |
| 1964 | D | 20,034 | 18,411 | 38,445 | |
| 1960 | D | 20,134 | 10,940 | 31,074 | |
| 1956 | D | 16,637 | 6,822 | 25,583 | |
| 1952 | D | 21,883 | 10,028 | 31,911 | |
| 1948 | D | 6,741 | 627 | 12,041 | |
| 1944 | D | 8,092 | 402 | 8,738 | |
| 1940 | D | 9,119 | 248 | 9,367 | |
| 1936 | D | 10,739 | 0 | 10,912 | |
| 1932 | D | 9,216 | 0 | 9,444 | |
| 1928 | D | 3,859 | 760 | 4,620 | |
| 1924 | — | 0 | 0 | 0 | |
| 1920 | D | 4,584 | 182 | 4,766 | |
| 1916 | D | 4,503 | 112 | 4,675 | |
| 1912 | D | 3,616 | 0 | 3,844 | |
| 1908 | D | 4,162 | 225 | 4,392 | |
| 1904 | D | 2,621 | 84 | 2,705 | |
| 1900 | D | 2,467 | 101 | 2,568 | |
| 1896 | D | 4,234 | 247 | 4,481 | |
| 1892 | D | 3,515 | 551 | 4,195 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Spartanburg County anchors South Carolina's Upstate industrial corridor, home to a major BMW plant and a workforce that has voted Republican by roughly 30-plus points in every recent presidential cycle.
The unraveling was not abrupt. The Democratic margin in Spartanburg County peaked at ninety-eight points in 1936; it narrowed steadily over the late twentieth century. The 1980 election delivered the county to the Republican party for the first time in many years, by a margin of five points. By 2024, the margin had settled into deep Republican territory.
The economic and demographic context is severe. Spartanburg County's median household income of $66,234 is among the lowest of any county in the United States; 15% of residents live below the federal poverty line. The county's voting pattern over the last decade is most similar to that of Mathews County and Churchill County.