| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 3,309 | 14,477 | 17,957 | |
| 2020 | R | 2,801 | 12,651 | 15,560 | |
| 2016 | R | 1,963 | 9,852 | 12,063 | |
| 2012 | R | 2,139 | 8,773 | 11,109 | |
| 2008 | R | 2,486 | 8,013 | 10,634 | |
| 2004 | R | 2,327 | 6,847 | 9,245 | |
| 2000 | R | 2,230 | 4,567 | 6,956 | |
| 1996 | R | 2,175 | 2,685 | 5,513 | |
| 1992 | R | 2,304 | 2,533 | 5,656 | |
| 1988 | R | 1,258 | 2,396 | 3,664 | |
| 1984 | R | 1,112 | 1,914 | 3,026 | |
| 1980 | D | 1,700 | 1,546 | 3,311 | |
| 1976 | D | 2,795 | 1,154 | 3,949 | |
| 1972 | R | 742 | 2,317 | 3,059 | |
| 1968 | R | 974 | 1,221 | 3,101 | |
| 1964 | D | 2,135 | 1,473 | 3,608 | |
| 1960 | R | 1,185 | 1,537 | 2,722 | |
| 1956 | D | 1,386 | 1,360 | 2,746 | |
| 1952 | D | 1,360 | 1,330 | 2,690 | |
| 1948 | D | 1,420 | 1,274 | 2,778 | |
| 1944 | D | 1,288 | 760 | 2,048 | |
| 1940 | D | 950 | 557 | 1,509 | |
| 1936 | D | 1,148 | 783 | 1,931 | |
| 1932 | D | 1,344 | 810 | 2,154 | |
| 1928 | R | 623 | 2,873 | 3,496 | |
| 1924 | D | 793 | 719 | 1,567 | |
| 1920 | R | 469 | 562 | 1,031 | |
| 1916 | D | 532 | 523 | 1,055 | |
| 1912 | D | 319 | 88 | 663 | |
| 1908 | R | 344 | 418 | 767 | |
| 1904 | R | 419 | 466 | 1,005 | |
| 1900 | D | 417 | 397 | 843 | |
| 1896 | D | 560 | 419 | 999 | |
| 1892 | D | 600 | 373 | 1,040 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Nestled in the north Georgia mountains, Union County delivers some of the state's most lopsided presidential margins, with Republicans routinely clearing 80% of the vote in a sparsely populated, predominantly white rural electorate.
The unraveling was not abrupt. The Democratic margin in Union County peaked at forty-two points in 1976; 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 twenty-seven points. By 2024, the margin had widened further.
The economic and demographic context is severe. Union County's median household income of $66,176 is among the lowest of any county in the United States; 11% of residents live below the federal poverty line. The county's voting pattern over the last decade is most similar to that of Towns County and Rabun County.