| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 22,810 | 34,734 | 58,804 | |
| 2020 | R | 23,093 | 33,668 | 57,869 | |
| 2016 | R | 18,791 | 30,012 | 51,749 | |
| 2012 | R | 20,807 | 25,450 | 47,278 | |
| 2008 | R | 21,953 | 25,326 | 47,725 | |
| 2004 | R | 17,648 | 24,495 | 42,337 | |
| 2000 | R | 17,360 | 19,417 | 37,336 | |
| 1996 | D | 17,799 | 14,396 | 35,916 | |
| 1992 | D | 17,460 | 13,333 | 36,694 | |
| 1988 | R | 14,528 | 16,544 | 31,192 | |
| 1984 | R | 14,138 | 19,419 | 33,785 | |
| 1980 | R | 14,137 | 15,508 | 31,181 | |
| 1976 | D | 16,670 | 12,732 | 29,731 | |
| 1972 | R | 10,838 | 16,111 | 27,113 | |
| 1968 | D | 11,493 | 10,305 | 26,886 | |
| 1964 | D | 17,330 | 7,701 | 25,156 | |
| 1960 | D | 14,431 | 12,803 | 27,304 | |
| 1956 | R | 11,871 | 12,483 | 24,433 | |
| 1952 | D | 11,703 | 11,190 | 23,025 | |
| 1948 | D | 10,953 | 7,001 | 18,153 | |
| 1944 | D | 9,778 | 7,241 | 17,081 | |
| 1940 | D | 9,015 | 6,044 | 15,104 | |
| 1936 | D | 10,116 | 5,536 | 15,896 | |
| 1932 | D | 9,501 | 5,881 | 15,522 | |
| 1928 | R | 6,193 | 8,056 | 14,285 | |
| 1924 | R | 5,218 | 5,944 | 11,498 | |
| 1920 | D | 6,729 | 6,466 | 13,357 | |
| 1916 | D | 3,572 | 3,173 | 6,876 | |
| 1912 | D | 3,315 | 805 | 6,775 | |
| 1908 | D | 4,085 | 3,706 | 7,959 | |
| 1904 | R | 3,587 | 3,644 | 7,468 | |
| 1900 | D | 4,134 | 3,855 | 8,068 | |
| 1896 | R | 3,785 | 3,897 | 7,758 | |
| 1892 | D | 4,013 | 3,280 | 7,415 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Clark County sits directly across the Ohio River from Louisville, Kentucky, and despite its suburban character has moved from competitive to reliably Republican in presidential races, posting a 20-point margin in 2024.
The Republican margin in Clark County reached its widest at twenty-two points in 2016. The margin in 2024 was twenty points, in line with the county's deep historical pattern.
Clark County's loyalty is rooted in its place. Median household income of $74,214, a 82% non-Hispanic-white share, and a population of 124,354 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 Ben Hill County and Seminole County.