| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 9,144 | 26,943 | 36,297 | |
| 2020 | R | 7,720 | 23,358 | 31,570 | |
| 2016 | R | 4,853 | 17,874 | 23,603 | |
| 2012 | R | 4,947 | 15,596 | 20,854 | |
| 2008 | R | 4,936 | 15,230 | 20,316 | |
| 2004 | R | 3,613 | 12,503 | 16,182 | |
| 2000 | R | 3,232 | 7,326 | 10,650 | |
| 1996 | R | 3,031 | 5,022 | 8,848 | |
| 1992 | R | 2,690 | 3,814 | 7,963 | |
| 1988 | R | 1,905 | 3,933 | 5,859 | |
| 1984 | R | 2,055 | 4,266 | 6,321 | |
| 1980 | D | 2,783 | 2,528 | 5,377 | |
| 1976 | D | 2,906 | 1,654 | 4,560 | |
| 1972 | R | 497 | 3,175 | 3,672 | |
| 1968 | R | 635 | 769 | 3,965 | |
| 1964 | R | 680 | 2,676 | 3,356 | |
| 1960 | R | 880 | 885 | 1,765 | |
| 1956 | R | 611 | 637 | 1,248 | |
| 1952 | R | 800 | 829 | 1,629 | |
| 1948 | D | 347 | 160 | 1,293 | |
| 1944 | D | 433 | 365 | 798 | |
| 1940 | D | 633 | 227 | 860 | |
| 1936 | D | 612 | 142 | 755 | |
| 1932 | D | 518 | 90 | 610 | |
| 1928 | R | 163 | 627 | 790 | |
| 1924 | D | 337 | 39 | 406 | |
| 1920 | D | 726 | 118 | 844 | |
| 1916 | D | 450 | 8 | 522 | |
| 1912 | D | 343 | 5 | 358 | |
| 1908 | D | 302 | 89 | 447 | |
| 1904 | D | 370 | 47 | 500 | |
| 1900 | D | 387 | 65 | 462 | |
| 1896 | D | 372 | 209 | 617 | |
| 1892 | D | 464 | 123 | 666 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Effingham sits on Savannah's northwestern fringe, where rapid suburban spillover has brought new residents without meaningfully shifting its lopsided Republican presidential margins, which topped 49 points in 2024.
The shift began with civil rights. 1984 marked the realignment in Effingham County, by a thirty-five points margin. The Republican margin reached its widest at seventy-three points in 1972. The 2024 margin was forty-nine points.
The political shift has tracked, in Effingham County, the political shift of the South more broadly. A 75% non-Hispanic-white share, a median household income of $88,438, and a 7% poverty rate describe the demographic context. The county's voting pattern over the last decade is most similar to that of Harris County and St. Clair County.
