| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 1,067 | 4,416 | 5,573 | |
| 2020 | R | 1,118 | 4,309 | 5,566 | |
| 2016 | R | 878 | 3,783 | 5,004 | |
| 2012 | R | 1,146 | 3,600 | 4,871 | |
| 2008 | R | 1,332 | 3,389 | 4,799 | |
| 2004 | R | 1,012 | 3,785 | 4,866 | |
| 2000 | R | 1,066 | 3,251 | 4,491 | |
| 1996 | R | 1,172 | 2,623 | 4,274 | |
| 1992 | R | 994 | 2,388 | 4,617 | |
| 1988 | R | 1,289 | 3,022 | 4,334 | |
| 1984 | R | 842 | 3,418 | 4,285 | |
| 1980 | R | 778 | 3,200 | 4,271 | |
| 1976 | R | 1,337 | 2,737 | 4,181 | |
| 1972 | R | 907 | 2,960 | 3,867 | |
| 1968 | R | 918 | 2,592 | 3,654 | |
| 1964 | R | 1,886 | 2,105 | 3,991 | |
| 1960 | R | 1,223 | 3,249 | 4,472 | |
| 1956 | R | 1,075 | 3,217 | 4,292 | |
| 1952 | R | 1,130 | 3,579 | 4,709 | |
| 1948 | R | 1,509 | 2,406 | 3,915 | |
| 1944 | R | 1,330 | 3,057 | 4,387 | |
| 1940 | R | 1,666 | 3,286 | 4,952 | |
| 1936 | R | 2,653 | 2,748 | 5,449 | |
| 1932 | D | 2,969 | 2,003 | 5,051 | |
| 1928 | R | 1,606 | 3,634 | 5,284 | |
| 1924 | R | 1,545 | 2,935 | 5,230 | |
| 1920 | R | 1,356 | 2,950 | 4,410 | |
| 1916 | D | 1,816 | 1,444 | 3,346 | |
| 1912 | D | 1,433 | 450 | 3,088 | |
| 1908 | D | 1,664 | 1,633 | 3,448 | |
| 1904 | R | 551 | 1,845 | 3,006 | |
| 1900 | D | 1,571 | 1,524 | 3,185 | |
| 1896 | D | 1,562 | 1,380 | 3,006 | |
| 1892 | D | 1,207 | 265 | 2,810 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Hamilton County's R+60.4 margin in 2024 places it among the most heavily one-sided counties in the state, a pattern consistent with its small-town, agriculturally rooted demographics and sparse population of roughly 9,400 residents.
The Republican margin in Hamilton County reached its widest at sixty points in 1984. The margin in 2024 was sixty points, in line with the county's deep historical pattern.
Hamilton County's loyalty is rooted in its place. Median household income of $83,994, a 92% non-Hispanic-white share, and a population of 9,464 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 Pierce County and Phelps County.
