| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 18,952 | 28,450 | 48,334 | |
| 2020 | R | 19,374 | 28,482 | 48,878 | |
| 2016 | R | 14,658 | 25,050 | 42,510 | |
| 2012 | R | 15,080 | 24,240 | 40,177 | |
| 2008 | R | 15,622 | 24,046 | 40,297 | |
| 2004 | R | 14,253 | 25,540 | 40,175 | |
| 2000 | R | 12,040 | 20,789 | 33,829 | |
| 1996 | R | 11,957 | 16,640 | 31,216 | |
| 1992 | R | 10,673 | 16,382 | 32,840 | |
| 1988 | R | 9,553 | 19,387 | 29,104 | |
| 1984 | R | 9,068 | 21,473 | 30,679 | |
| 1980 | R | 11,059 | 16,743 | 29,208 | |
| 1976 | R | 12,423 | 15,798 | 28,821 | |
| 1972 | R | 8,585 | 20,025 | 29,445 | |
| 1968 | R | 9,747 | 13,681 | 28,203 | |
| 1964 | D | 16,012 | 12,209 | 28,264 | |
| 1960 | R | 14,690 | 17,388 | 32,078 | |
| 1956 | R | 10,359 | 18,617 | 29,171 | |
| 1952 | R | 12,976 | 17,705 | 30,716 | |
| 1948 | D | 13,008 | 11,851 | 25,231 | |
| 1944 | R | 12,959 | 13,647 | 26,670 | |
| 1940 | R | 14,801 | 14,916 | 29,820 | |
| 1936 | D | 16,780 | 10,327 | 30,196 | |
| 1932 | D | 17,776 | 11,665 | 30,208 | |
| 1928 | R | 14,508 | 17,317 | 31,920 | |
| 1924 | R | 5,564 | 12,329 | 24,936 | |
| 1920 | R | 10,597 | 12,210 | 23,976 | |
| 1916 | D | 7,290 | 5,696 | 13,595 | |
| 1912 | D | 4,687 | 2,276 | 10,900 | |
| 1908 | R | 6,813 | 7,025 | 14,804 | |
| 1904 | R | 4,562 | 5,759 | 11,553 | |
| 1900 | R | 5,141 | 5,567 | 11,050 | |
| 1896 | R | 4,304 | 5,821 | 10,263 | |
| 1892 | D | 4,302 | 3,959 | 8,470 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Campbell County sits on the Ohio River opposite Cincinnati, giving it an urban-adjacent character uncommon in Kentucky's interior. Despite suburban density, recent presidential contests have run roughly 20 points to the right, a shift that has widened steadily since 2008.
The Republican margin in Campbell County reached its widest at forty points in 1984. The margin in 2024 was twenty points, in line with the county's deep historical pattern.
Campbell County's loyalty is rooted in its place. Median household income of $77,567, a 91% non-Hispanic-white share, and a population of 93,426 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 Kenton County and Butler County.