| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 732 | 2,998 | 3,802 | |
| 2020 | R | 782 | 2,929 | 3,792 | |
| 2016 | R | 672 | 2,435 | 3,350 | |
| 2012 | R | 944 | 2,276 | 3,315 | |
| 2008 | R | 1,175 | 2,362 | 3,626 | |
| 2004 | R | 1,295 | 2,500 | 3,863 | |
| 2000 | R | 1,327 | 1,984 | 3,478 | |
| 1996 | R | 1,367 | 1,636 | 3,506 | |
| 1992 | R | 1,178 | 1,218 | 3,687 | |
| 1988 | R | 1,466 | 1,781 | 3,283 | |
| 1984 | R | 1,155 | 2,462 | 3,667 | |
| 1980 | R | 1,170 | 2,363 | 3,773 | |
| 1976 | D | 1,886 | 1,872 | 3,844 | |
| 1972 | R | 1,035 | 2,718 | 3,836 | |
| 1968 | R | 1,242 | 2,168 | 3,814 | |
| 1964 | D | 2,058 | 1,692 | 3,780 | |
| 1960 | R | 1,589 | 2,665 | 4,274 | |
| 1956 | R | 1,369 | 3,080 | 4,463 | |
| 1952 | R | 1,333 | 3,672 | 5,018 | |
| 1948 | R | 2,071 | 2,787 | 4,902 | |
| 1944 | R | 1,649 | 3,060 | 4,716 | |
| 1940 | R | 2,114 | 3,886 | 6,033 | |
| 1936 | R | 2,767 | 3,452 | 6,318 | |
| 1932 | D | 3,580 | 2,408 | 6,076 | |
| 1928 | R | 1,874 | 3,562 | 5,485 | |
| 1924 | R | 1,421 | 3,101 | 5,085 | |
| 1920 | R | 1,708 | 3,068 | 4,884 | |
| 1916 | D | 2,739 | 2,386 | 5,429 | |
| 1912 | D | 1,365 | 618 | 3,108 | |
| 1908 | R | 1,512 | 1,722 | 3,360 | |
| 1904 | R | 1,043 | 1,891 | 3,246 | |
| 1900 | R | 1,757 | 1,846 | 3,663 | |
| 1896 | D | 1,890 | 1,780 | 3,742 | |
| 1892 | R | 0 | 1,476 | 3,208 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Anderson County's rural character and small population—anchored by the county seat of Garnett—has produced some of the widest presidential margins in the state, with Republicans carrying the county by roughly 60 points in 2024.
The Republican margin in Anderson 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.
Anderson County's loyalty is rooted in its place. Median household income of $70,614, a 92% non-Hispanic-white share, and a population of 7,834 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 Scott County and Linn County.
