| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 3,226 | 9,650 | 13,095 | |
| 2020 | R | 3,348 | 9,661 | 13,254 | |
| 2016 | R | 2,634 | 8,242 | 11,422 | |
| 2012 | R | 3,315 | 6,822 | 10,320 | |
| 2008 | R | 3,462 | 6,885 | 10,552 | |
| 2004 | R | 3,141 | 6,363 | 9,591 | |
| 2000 | R | 2,902 | 4,909 | 7,967 | |
| 1996 | R | 2,898 | 2,972 | 6,653 | |
| 1992 | R | 2,491 | 2,731 | 6,472 | |
| 1988 | R | 2,176 | 3,225 | 5,450 | |
| 1984 | R | 1,717 | 3,425 | 5,185 | |
| 1980 | D | 2,567 | 2,052 | 4,764 | |
| 1976 | D | 2,388 | 1,682 | 4,132 | |
| 1972 | R | 1,302 | 2,298 | 3,670 | |
| 1968 | R | 1,334 | 1,594 | 3,596 | |
| 1964 | D | 2,491 | 1,085 | 3,586 | |
| 1960 | D | 2,038 | 2,033 | 4,071 | |
| 1956 | D | 2,089 | 1,878 | 3,973 | |
| 1952 | D | 2,153 | 1,445 | 3,607 | |
| 1948 | D | 2,135 | 971 | 3,154 | |
| 1944 | D | 2,148 | 1,409 | 3,579 | |
| 1940 | D | 2,515 | 1,244 | 3,769 | |
| 1936 | D | 2,454 | 1,360 | 3,825 | |
| 1932 | D | 2,415 | 1,184 | 3,634 | |
| 1928 | R | 1,718 | 1,859 | 3,578 | |
| 1924 | D | 2,089 | 1,419 | 3,562 | |
| 1920 | D | 2,499 | 1,819 | 4,330 | |
| 1916 | D | 1,521 | 1,065 | 2,613 | |
| 1912 | D | 1,391 | 579 | 2,397 | |
| 1908 | D | 1,477 | 1,040 | 2,566 | |
| 1904 | D | 1,429 | 959 | 2,433 | |
| 1900 | D | 1,485 | 1,148 | 2,656 | |
| 1896 | D | 1,286 | 1,151 | 2,499 | |
| 1892 | D | 1,142 | 749 | 1,967 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
A small Bluegrass county of roughly 19,000 residents, Anderson has shifted sharply toward Republican dominance in recent cycles, recording a 49-point presidential margin in 2024 that places it among Kentucky's most lopsided counties.
The Republican margin in Anderson County reached its widest at forty-nine points in 2016. The margin in 2024 was forty-nine points, in line with the county's deep historical pattern.
Anderson County's loyalty is rooted in its place. Median household income of $74,488, a 93% non-Hispanic-white share, and a population of 24,353 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 Mercer County and Bullitt County.