| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 12,949 | 30,730 | 44,157 | |
| 2020 | R | 10,453 | 26,804 | 37,921 | |
| 2016 | R | 6,580 | 21,108 | 29,174 | |
| 2012 | R | 6,028 | 18,725 | 25,270 | |
| 2008 | R | 6,657 | 17,625 | 24,582 | |
| 2004 | R | 4,095 | 13,520 | 17,750 | |
| 2000 | R | 3,657 | 7,925 | 12,102 | |
| 1996 | R | 3,928 | 5,342 | 10,342 | |
| 1992 | R | 3,991 | 4,328 | 9,982 | |
| 1988 | R | 2,442 | 4,738 | 7,218 | |
| 1984 | R | 2,367 | 4,123 | 6,490 | |
| 1980 | D | 3,876 | 2,284 | 6,309 | |
| 1976 | D | 4,756 | 1,364 | 6,120 | |
| 1972 | R | 867 | 3,423 | 4,290 | |
| 1968 | R | 1,070 | 1,372 | 5,173 | |
| 1964 | R | 2,277 | 2,316 | 4,593 | |
| 1960 | D | 2,759 | 577 | 3,336 | |
| 1956 | D | 2,266 | 442 | 2,708 | |
| 1952 | D | 2,367 | 236 | 2,603 | |
| 1948 | D | 1,554 | 155 | 2,053 | |
| 1944 | D | 1,513 | 257 | 1,770 | |
| 1940 | D | 1,615 | 219 | 1,839 | |
| 1936 | D | 1,181 | 172 | 1,355 | |
| 1932 | D | 1,111 | 23 | 1,145 | |
| 1928 | R | 479 | 684 | 1,163 | |
| 1924 | D | 501 | 88 | 762 | |
| 1920 | D | 731 | 412 | 1,143 | |
| 1916 | D | 712 | 148 | 962 | |
| 1912 | — | — | — | — | |
| 1908 | — | — | — | — | |
| 1904 | — | — | — | — | |
| 1900 | — | — | — | — | |
| 1896 | — | — | — | — | |
| 1892 | — | — | — | — | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Barrow County sits northeast of Atlanta in the outer commuter belt, where rapid residential growth since the 1990s has not diluted its strong Republican lean — the 2024 presidential margin held well above the state average.
The unraveling was not abrupt. The Democratic margin in Barrow County peaked at ninety-five 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 twenty-seven points. By 2024, the margin had widened further.
The economic and demographic context is severe. Barrow County's median household income of $80,653 is among the lowest of any county in the United States; 10% of residents live below the federal poverty line. The county's voting pattern over the last decade is most similar to that of Walton County and Dawson County.