| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 3,617 | 15,124 | 19,084 | |
| 2020 | R | 3,716 | 15,006 | 19,083 | |
| 2016 | R | 3,083 | 13,635 | 17,609 | |
| 2012 | R | 3,861 | 12,501 | 16,613 | |
| 2008 | R | 5,262 | 11,323 | 16,835 | |
| 2004 | R | 4,388 | 11,774 | 16,278 | |
| 2000 | R | 4,225 | 9,855 | 14,485 | |
| 1996 | R | 4,825 | 7,696 | 14,204 | |
| 1992 | R | 5,221 | 6,329 | 14,981 | |
| 1988 | R | 4,553 | 8,431 | 13,066 | |
| 1984 | R | 3,841 | 9,617 | 13,504 | |
| 1980 | R | 4,229 | 9,104 | 13,808 | |
| 1976 | R | 5,952 | 7,194 | 13,391 | |
| 1972 | R | 4,431 | 8,752 | 13,193 | |
| 1968 | R | 4,496 | 6,698 | 11,972 | |
| 1964 | D | 6,782 | 5,044 | 11,826 | |
| 1960 | R | 5,676 | 6,410 | 12,092 | |
| 1956 | R | 4,455 | 6,904 | 11,380 | |
| 1952 | R | 4,745 | 6,530 | 11,300 | |
| 1948 | D | 4,940 | 4,823 | 9,859 | |
| 1944 | R | 4,587 | 5,441 | 10,119 | |
| 1940 | D | 5,988 | 5,941 | 12,006 | |
| 1936 | D | 6,030 | 4,293 | 10,583 | |
| 1932 | D | 6,503 | 2,933 | 9,569 | |
| 1928 | D | 4,239 | 3,882 | 8,214 | |
| 1924 | D | 3,814 | 3,159 | 8,063 | |
| 1920 | R | 2,985 | 4,176 | 7,267 | |
| 1916 | D | 4,529 | 3,207 | 7,939 | |
| 1912 | D | 2,575 | 1,002 | 4,309 | |
| 1908 | D | 2,826 | 1,877 | 4,830 | |
| 1904 | D | 2,303 | 1,863 | 4,365 | |
| 1900 | D | 2,979 | 1,853 | 4,883 | |
| 1896 | D | 2,953 | 1,895 | 4,913 | |
| 1892 | D | 2,744 | 1,472 | 4,471 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Effingham County, anchored by its small city of the same name at the crossroads of I-57 and I-70, delivered a 60-point Republican presidential margin in 2024—among the widest gaps in a state whose statewide results ran in the opposite direction.
The Republican margin in Effingham County reached its widest at sixty points in 2024. The margin in 2024 was sixty points, in line with the county's deep historical pattern.
Effingham County's loyalty is rooted in its place. Median household income of $80,404, a 96% non-Hispanic-white share, and a population of 34,522 together describe a community whose political habits are deeply settled. The county's voting pattern over the last decade is most similar to that of Christian County and Wilson County.
