| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 2,863 | 9,911 | 12,908 | |
| 2020 | R | 3,062 | 9,949 | 13,247 | |
| 2016 | R | 2,920 | 8,717 | 12,516 | |
| 2012 | R | 4,619 | 7,489 | 12,561 | |
| 2008 | R | 5,013 | 7,749 | 13,149 | |
| 2004 | R | 4,891 | 8,441 | 13,392 | |
| 2000 | R | 4,557 | 7,124 | 12,068 | |
| 1996 | R | 4,930 | 5,506 | 11,876 | |
| 1992 | R | 4,364 | 5,851 | 13,215 | |
| 1988 | R | 4,145 | 7,291 | 11,606 | |
| 1984 | R | 3,813 | 8,722 | 12,620 | |
| 1980 | R | 3,863 | 7,457 | 12,123 | |
| 1976 | R | 4,650 | 6,076 | 11,075 | |
| 1972 | R | 3,535 | 8,713 | 12,602 | |
| 1968 | R | 4,180 | 6,963 | 12,937 | |
| 1964 | D | 7,324 | 5,679 | 13,003 | |
| 1960 | R | 4,996 | 9,042 | 14,038 | |
| 1956 | R | 4,556 | 9,049 | 13,605 | |
| 1952 | R | 5,064 | 9,235 | 14,299 | |
| 1948 | R | 5,474 | 7,441 | 12,967 | |
| 1944 | R | 5,128 | 8,566 | 13,694 | |
| 1940 | R | 6,547 | 9,192 | 15,739 | |
| 1936 | D | 8,441 | 7,631 | 16,283 | |
| 1932 | D | 8,717 | 7,215 | 16,084 | |
| 1928 | R | 5,306 | 8,137 | 13,517 | |
| 1924 | R | 5,523 | 7,112 | 13,254 | |
| 1920 | R | 5,817 | 8,071 | 14,003 | |
| 1916 | D | 4,304 | 4,119 | 8,567 | |
| 1912 | D | 3,912 | 2,775 | 8,354 | |
| 1908 | R | 4,164 | 4,444 | 8,827 | |
| 1904 | R | 3,096 | 4,736 | 8,256 | |
| 1900 | R | 4,190 | 4,389 | 8,766 | |
| 1896 | R | 4,247 | 4,276 | 8,639 | |
| 1892 | R | 3,483 | 3,515 | 7,367 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Hardin County, anchored by the small city of Kenton, has shifted decisively toward Republican margins over the past decade, posting a 54-point gap in 2024 — well above even Ohio's statewide Republican lean.
The Republican margin in Hardin County reached its widest at fifty-five points in 2024. The margin in 2024 was fifty-five points, in line with the county's deep historical pattern.
Hardin County's loyalty is rooted in its place. Median household income of $62,484, a 93% non-Hispanic-white share, and a population of 30,475 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 Highland County and Richland County.
