| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 16,572 | 30,672 | 48,082 | |
| 2020 | R | 18,101 | 29,832 | 48,941 | |
| 2016 | R | 13,944 | 26,971 | 43,156 | |
| 2012 | R | 15,214 | 23,357 | 39,218 | |
| 2008 | R | 15,650 | 23,896 | 39,990 | |
| 2004 | R | 11,507 | 24,627 | 36,441 | |
| 2000 | R | 11,095 | 18,964 | 30,690 | |
| 1996 | R | 11,031 | 12,642 | 26,617 | |
| 1992 | R | 9,417 | 12,299 | 25,958 | |
| 1988 | R | 7,262 | 13,240 | 20,599 | |
| 1984 | R | 6,329 | 14,293 | 20,771 | |
| 1980 | R | 8,339 | 9,779 | 18,738 | |
| 1976 | D | 7,977 | 6,965 | 15,185 | |
| 1972 | R | 4,060 | 8,740 | 13,256 | |
| 1968 | R | 4,470 | 5,329 | 12,737 | |
| 1964 | D | 7,460 | 3,744 | 11,264 | |
| 1960 | R | 5,141 | 6,191 | 11,332 | |
| 1956 | R | 4,325 | 5,050 | 9,430 | |
| 1952 | D | 4,599 | 3,914 | 8,558 | |
| 1948 | D | 3,990 | 2,297 | 6,447 | |
| 1944 | D | 4,436 | 2,831 | 7,294 | |
| 1940 | D | 4,718 | 2,351 | 7,090 | |
| 1936 | D | 4,480 | 2,284 | 6,814 | |
| 1932 | D | 6,047 | 2,801 | 8,920 | |
| 1928 | R | 3,210 | 4,624 | 7,848 | |
| 1924 | D | 4,296 | 2,735 | 7,198 | |
| 1920 | D | 5,382 | 3,334 | 8,782 | |
| 1916 | D | 3,272 | 1,887 | 5,187 | |
| 1912 | D | 2,656 | 632 | 4,618 | |
| 1908 | D | 3,010 | 1,913 | 4,990 | |
| 1904 | D | 2,714 | 1,671 | 4,537 | |
| 1900 | D | 3,059 | 2,053 | 5,207 | |
| 1896 | D | 2,848 | 1,885 | 4,873 | |
| 1892 | D | 1,909 | 1,075 | 3,515 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Home to Fort Knox and one of Kentucky's larger non-metro populations, Hardin County combines a substantial military-connected workforce with rural surrounding communities, producing consistent double-digit Republican margins in recent federal elections.
The Republican margin in Hardin County reached its widest at thirty-eight points in 1984. The margin in 2024 was twenty-nine points, in line with the county's deep historical pattern.
Hardin County's loyalty is rooted in its place. Median household income of $67,647, a 76% non-Hispanic-white share, and a population of 111,942 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 Isle of Wight County and Comanche County.
