| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 74,437 | 97,195 | 174,438 | |
| 2020 | R | 75,522 | 92,108 | 171,113 | |
| 2016 | R | 55,316 | 78,733 | 142,408 | |
| 2012 | R | 58,836 | 79,933 | 141,741 | |
| 2008 | R | 64,246 | 81,702 | 147,520 | |
| 2004 | R | 57,302 | 78,547 | 136,936 | |
| 2000 | R | 51,708 | 66,605 | 120,379 | |
| 1996 | R | 48,008 | 55,205 | 110,831 | |
| 1992 | R | 46,770 | 53,476 | 115,085 | |
| 1988 | R | 40,990 | 68,111 | 109,709 | |
| 1984 | R | 41,449 | 69,626 | 111,622 | |
| 1980 | R | 41,913 | 57,575 | 102,092 | |
| 1976 | R | 45,348 | 47,969 | 94,421 | |
| 1972 | R | 20,657 | 58,469 | 82,794 | |
| 1968 | R | 23,441 | 29,302 | 84,823 | |
| 1964 | R | 38,546 | 40,200 | 78,746 | |
| 1960 | R | 30,482 | 39,703 | 71,277 | |
| 1956 | R | 28,287 | 34,429 | 64,830 | |
| 1952 | R | 23,832 | 29,681 | 53,830 | |
| 1948 | D | 16,968 | 10,434 | 30,189 | |
| 1944 | D | 17,527 | 10,379 | 28,173 | |
| 1940 | D | 17,083 | 9,771 | 26,922 | |
| 1936 | D | 16,568 | 6,917 | 23,589 | |
| 1932 | D | 11,469 | 7,090 | 18,937 | |
| 1928 | R | 7,190 | 13,244 | 20,537 | |
| 1924 | R | 7,511 | 8,421 | 16,780 | |
| 1920 | R | 9,910 | 10,793 | 21,037 | |
| 1916 | D | 6,058 | 5,303 | 11,595 | |
| 1912 | D | 4,596 | 1,662 | 9,401 | |
| 1908 | R | 4,781 | 4,858 | 9,939 | |
| 1904 | R | 3,509 | 4,382 | 8,256 | |
| 1900 | R | 3,471 | 4,541 | 8,372 | |
| 1896 | R | 4,056 | 5,115 | 9,394 | |
| 1892 | D | 4,025 | 3,714 | 8,153 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Hamilton County anchors Tennessee's fourth-largest metro and has shifted from a competitive swing county in the early 2000s to a reliable Republican margin, reflecting broader suburban realignment across mid-sized Southern cities.
The Republican margin in Hamilton County reached its widest at forty-six points in 1972. The margin in 2024 was thirteen points, in line with the county's deep historical pattern.
Hamilton County's loyalty is rooted in its place. Median household income of $76,183, a 70% non-Hispanic-white share, and a population of 376,192 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 Greene County and Woodford County.
