| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 44,062 | 73,828 | 119,256 | |
| 2020 | R | 40,959 | 73,033 | 115,498 | |
| 2016 | R | 31,177 | 61,798 | 96,431 | |
| 2012 | R | 33,171 | 56,138 | 90,483 | |
| 2008 | R | 31,384 | 52,507 | 84,402 | |
| 2004 | R | 20,254 | 43,252 | 63,755 | |
| 2000 | D | 39,453 | 19,281 | 59,179 | |
| 1996 | R | 19,458 | 33,149 | 56,739 | |
| 1992 | R | 19,121 | 34,714 | 61,435 | |
| 1988 | R | 14,582 | 34,775 | 49,451 | |
| 1984 | R | 14,142 | 39,167 | 53,392 | |
| 1980 | R | 19,016 | 25,139 | 45,204 | |
| 1976 | D | 22,878 | 19,727 | 42,764 | |
| 1972 | R | 8,462 | 27,956 | 36,901 | |
| 1968 | R | 10,100 | 18,741 | 42,814 | |
| 1964 | D | 20,197 | 17,129 | 37,326 | |
| 1960 | R | 20,104 | 21,250 | 41,354 | |
| 1956 | R | 15,671 | 18,159 | 33,830 | |
| 1952 | R | 17,781 | 19,157 | 36,938 | |
| 1948 | D | 8,966 | 6,180 | 18,968 | |
| 1944 | D | 13,744 | 6,023 | 19,767 | |
| 1940 | D | 17,262 | 4,294 | 21,556 | |
| 1936 | D | 17,555 | 4,772 | 22,327 | |
| 1932 | D | 12,890 | 5,164 | 18,211 | |
| 1928 | R | 6,702 | 9,702 | 16,404 | |
| 1924 | D | 6,554 | 3,566 | 10,202 | |
| 1920 | D | 7,148 | 5,803 | 12,951 | |
| 1916 | D | 3,019 | 2,542 | 5,572 | |
| 1912 | D | 2,333 | 244 | 3,924 | |
| 1908 | D | 2,398 | 1,970 | 4,408 | |
| 1904 | D | 1,958 | 896 | 2,879 | |
| 1900 | D | 1,931 | 1,626 | 3,615 | |
| 1896 | D | 2,069 | 1,625 | 3,727 | |
| 1892 | D | 1,616 | 1,173 | 3,207 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Gaston County's economy traces back to the textile mill era, and its working-class base has produced some of the widest Republican presidential margins in the Charlotte metro, running roughly 25 points in 2024.
The shift began with civil rights. 2004 marked the realignment in Gaston County, by a thirty-six points margin. The Republican margin reached its widest at fifty-three points in 1972. The 2024 margin was twenty-five points.
The political shift has tracked, in Gaston County, the political shift of the South more broadly. A 68% non-Hispanic-white share, a median household income of $67,478, and a 14% poverty rate describe the demographic context. The county's voting pattern over the last decade is most similar to that of Union County and Henderson County.
