| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 3,297 | 7,775 | 11,234 | |
| 2020 | R | 3,661 | 7,438 | 11,244 | |
| 2016 | R | 3,056 | 6,753 | 10,457 | |
| 2012 | R | 4,095 | 5,912 | 10,159 | |
| 2008 | R | 4,625 | 5,162 | 9,906 | |
| 2004 | R | 4,140 | 5,337 | 9,553 | |
| 2000 | R | 3,660 | 4,225 | 8,121 | |
| 1996 | D | 3,562 | 3,129 | 7,646 | |
| 1992 | R | 3,106 | 3,196 | 8,304 | |
| 1988 | R | 3,342 | 3,678 | 7,101 | |
| 1984 | R | 3,025 | 4,064 | 7,170 | |
| 1980 | R | 2,620 | 4,028 | 7,442 | |
| 1976 | R | 3,074 | 3,795 | 7,010 | |
| 1972 | R | 2,373 | 3,739 | 6,381 | |
| 1968 | R | 2,286 | 3,472 | 6,151 | |
| 1964 | D | 3,490 | 2,443 | 5,938 | |
| 1960 | R | 2,696 | 3,575 | 6,273 | |
| 1956 | R | 2,498 | 3,641 | 6,157 | |
| 1952 | R | 1,748 | 4,401 | 6,194 | |
| 1948 | D | 2,324 | 2,304 | 4,766 | |
| 1944 | D | 2,473 | 2,133 | 4,627 | |
| 1940 | D | 2,985 | 2,736 | 5,742 | |
| 1936 | D | 3,399 | 2,322 | 5,791 | |
| 1932 | D | 2,500 | 2,074 | 4,706 | |
| 1928 | R | 1,251 | 3,045 | 4,315 | |
| 1924 | R | 435 | 2,967 | 4,483 | |
| 1920 | R | 760 | 3,298 | 4,101 | |
| 1916 | R | 893 | 1,249 | 2,182 | |
| 1912 | D | 502 | 457 | 1,862 | |
| 1908 | R | 503 | 1,109 | 1,666 | |
| 1904 | R | 312 | 1,320 | 1,692 | |
| 1900 | R | 445 | 1,352 | 1,848 | |
| 1896 | R | 517 | 1,131 | 1,679 | |
| 1892 | R | 443 | 801 | 1,307 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Home to the Iowa Great Lakes recreation corridor, Dickinson County draws seasonal tourism that inflates its summer population well above its 16,000 residents, yet its year-round electorate has delivered Republican presidential margins exceeding 35 points in recent cycles.
The Republican margin in Dickinson County reached its widest at sixty-two points in 1920. The margin in 2024 was forty points, in line with the county's deep historical pattern.
Dickinson County's loyalty is rooted in its place. Median household income of $75,432, a 94% non-Hispanic-white share, and a population of 17,990 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 Giles County and Roane County.
