| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 12,927 | 19,488 | 32,916 | |
| 2020 | R | 12,116 | 18,156 | 30,774 | |
| 2016 | R | 9,642 | 15,367 | 26,595 | |
| 2012 | R | 11,489 | 14,539 | 26,420 | |
| 2008 | D | 13,295 | 12,722 | 26,474 | |
| 2004 | R | 10,290 | 14,721 | 25,276 | |
| 2000 | R | 8,202 | 10,837 | 19,947 | |
| 1996 | R | 6,940 | 7,049 | 16,299 | |
| 1992 | R | 5,701 | 7,541 | 18,401 | |
| 1988 | R | 6,481 | 8,107 | 14,708 | |
| 1984 | R | 4,736 | 8,970 | 13,892 | |
| 1980 | R | 5,036 | 7,885 | 14,293 | |
| 1976 | R | 6,241 | 6,589 | 13,132 | |
| 1972 | R | 4,804 | 6,446 | 11,542 | |
| 1968 | R | 3,609 | 5,792 | 10,203 | |
| 1964 | D | 5,356 | 3,905 | 9,274 | |
| 1960 | R | 4,312 | 5,166 | 9,486 | |
| 1956 | R | 2,099 | 6,166 | 8,308 | |
| 1952 | R | 1,970 | 6,640 | 8,615 | |
| 1948 | R | 2,662 | 4,185 | 6,909 | |
| 1944 | R | 1,966 | 5,611 | 7,626 | |
| 1940 | R | 2,324 | 5,327 | 7,725 | |
| 1936 | D | 4,694 | 1,972 | 7,113 | |
| 1932 | D | 5,485 | 1,213 | 6,785 | |
| 1928 | D | 3,871 | 2,405 | 6,323 | |
| 1924 | R | 569 | 938 | 5,046 | |
| 1920 | R | 586 | 3,730 | 4,766 | |
| 1916 | R | 1,382 | 1,979 | 3,461 | |
| 1912 | D | 1,366 | 931 | 2,860 | |
| 1908 | D | 1,711 | 1,576 | 3,402 | |
| 1904 | R | 1,258 | 1,736 | 3,158 | |
| 1900 | D | 1,910 | 1,631 | 3,616 | |
| 1896 | D | 1,869 | 1,547 | 3,474 | |
| 1892 | D | 1,863 | 909 | 2,881 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Calumet County sits along Lake Winnebago's eastern shore and has shifted steadily rightward over the past decade, posting a nearly 20-point Republican margin in 2024 despite modest population growth driven by Fox Valley suburban spillover.
The Republican margin in Calumet County reached its widest at sixty-six points in 1920. The margin in 2024 was twenty points, in line with the county's deep historical pattern.
Calumet County's loyalty is rooted in its place. Median household income of $88,810, a 88% non-Hispanic-white share, and a population of 52,942 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 Jefferson County and Wilkin County.
