| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 28,111 | 57,204 | 86,416 | |
| 2020 | R | 24,210 | 51,501 | 76,799 | |
| 2016 | R | 16,583 | 42,533 | 62,210 | |
| 2012 | R | 15,168 | 39,653 | 55,718 | |
| 2008 | R | 15,521 | 37,571 | 53,549 | |
| 2004 | R | 10,647 | 31,682 | 42,609 | |
| 2000 | R | 9,056 | 21,327 | 31,226 | |
| 1996 | R | 7,794 | 13,058 | 22,970 | |
| 1992 | R | 7,093 | 9,814 | 20,553 | |
| 1988 | R | 4,212 | 9,668 | 13,929 | |
| 1984 | R | 3,650 | 7,981 | 11,631 | |
| 1980 | D | 5,697 | 4,480 | 10,422 | |
| 1976 | D | 6,195 | 3,044 | 9,239 | |
| 1972 | R | 1,560 | 5,751 | 7,311 | |
| 1968 | R | 1,204 | 2,442 | 7,437 | |
| 1964 | D | 3,712 | 3,656 | 7,368 | |
| 1960 | D | 3,855 | 1,159 | 5,014 | |
| 1956 | D | 3,003 | 850 | 3,853 | |
| 1952 | D | 3,837 | 652 | 4,489 | |
| 1948 | D | 2,214 | 219 | 2,649 | |
| 1944 | D | 2,649 | 130 | 2,779 | |
| 1940 | D | 2,846 | 103 | 2,957 | |
| 1936 | D | 2,260 | 73 | 2,336 | |
| 1932 | D | 2,183 | 46 | 2,235 | |
| 1928 | D | 1,656 | 229 | 1,885 | |
| 1924 | D | 1,010 | 67 | 1,117 | |
| 1920 | D | 1,094 | 169 | 1,263 | |
| 1916 | D | 1,179 | 85 | 1,290 | |
| 1912 | D | 1,044 | 35 | 1,125 | |
| 1908 | D | 1,032 | 220 | 1,272 | |
| 1904 | D | 1,070 | 160 | 1,285 | |
| 1900 | D | 1,063 | 232 | 1,302 | |
| 1896 | D | 1,196 | 571 | 1,792 | |
| 1892 | D | 2,005 | 1,085 | 3,145 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Coweta County sits at the southwestern edge of metro Atlanta's sprawl, where rapid population growth over the past two decades has not softened its consistent Republican lean — the 2024 presidential margin held above 33 points.
The unraveling was not abrupt. The Democratic margin in Coweta County peaked at ninety-six points in 1932; it narrowed steadily over the late twentieth century. The 1984 election delivered the county to the Republican party for the first time in many years, by a margin of thirty-seven points. By 2024, the margin had settled into deep Republican territory.
The economic and demographic context is severe. Coweta County's median household income of $95,548 is among the lowest of any county in the United States; 7% of residents live below the federal poverty line. The county's voting pattern over the last decade is most similar to that of Lee County and Bryan County.