| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 1,967 | 6,515 | 8,512 | |
| 2020 | R | 2,061 | 6,053 | 8,183 | |
| 2016 | R | 1,681 | 5,096 | 6,930 | |
| 2012 | R | 1,897 | 4,706 | 6,677 | |
| 2008 | R | 1,932 | 4,730 | 6,714 | |
| 2004 | R | 1,787 | 4,657 | 6,474 | |
| 2000 | R | 1,963 | 3,597 | 5,610 | |
| 1996 | R | 2,369 | 2,518 | 5,447 | |
| 1992 | R | 2,360 | 2,566 | 5,942 | |
| 1988 | R | 1,694 | 3,172 | 4,878 | |
| 1984 | R | 1,954 | 3,641 | 5,595 | |
| 1980 | D | 2,864 | 2,082 | 5,002 | |
| 1976 | D | 3,556 | 1,326 | 4,882 | |
| 1972 | R | 492 | 2,892 | 3,384 | |
| 1968 | D | 957 | 852 | 5,214 | |
| 1964 | R | 1,648 | 3,264 | 4,912 | |
| 1960 | D | 1,908 | 869 | 2,777 | |
| 1956 | D | 1,881 | 440 | 2,321 | |
| 1952 | D | 2,433 | 1,114 | 3,547 | |
| 1948 | D | 1,071 | 216 | 1,864 | |
| 1944 | D | 1,215 | 494 | 1,709 | |
| 1940 | D | 1,246 | 421 | 1,674 | |
| 1936 | D | 1,047 | 214 | 1,272 | |
| 1932 | D | 2,133 | 37 | 2,176 | |
| 1928 | R | 460 | 791 | 1,251 | |
| 1924 | D | 1,100 | 66 | 1,315 | |
| 1920 | D | 447 | 301 | 748 | |
| 1916 | D | 574 | 49 | 823 | |
| 1912 | D | 592 | 18 | 847 | |
| 1908 | D | 534 | 263 | 1,247 | |
| 1904 | D | 621 | 171 | 1,149 | |
| 1900 | D | 738 | 611 | 1,475 | |
| 1896 | R | 517 | 600 | 1,270 | |
| 1892 | D | 918 | 247 | 1,796 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Tattnall's rural, agriculture-dependent economy and small-town demographic profile have produced some of the widest Republican presidential margins in Georgia, with the 2024 gap exceeding 53 points in a county of roughly 22,000 residents.
The unraveling was not abrupt. The Democratic margin in Tattnall 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 points. By 2024, the margin had widened further.
The economic and demographic context is severe. Tattnall County's median household income of $50,747 is among the lowest of any county in the United States; 23% of residents live below the federal poverty line. The county's voting pattern over the last decade is most similar to that of Union Parish and Laurens County.