| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 18,172 | 18,798 | 37,584 | |
| 2020 | D | 18,108 | 17,493 | 36,203 | |
| 2016 | R | 14,690 | 14,799 | 31,357 | |
| 2012 | D | 18,736 | 12,838 | 31,927 | |
| 2008 | D | 18,167 | 11,562 | 30,176 | |
| 2004 | D | 15,708 | 14,415 | 30,417 | |
| 2000 | D | 13,035 | 11,586 | 25,653 | |
| 1996 | D | 9,889 | 7,448 | 20,285 | |
| 1992 | D | 9,128 | 8,886 | 23,422 | |
| 1988 | R | 8,324 | 10,225 | 18,687 | |
| 1984 | R | 7,158 | 11,069 | 18,313 | |
| 1980 | R | 8,456 | 9,992 | 20,195 | |
| 1976 | R | 9,204 | 9,577 | 19,192 | |
| 1972 | R | 6,980 | 10,285 | 17,493 | |
| 1968 | R | 6,406 | 8,608 | 16,048 | |
| 1964 | D | 9,288 | 6,345 | 15,656 | |
| 1960 | R | 6,441 | 10,403 | 16,867 | |
| 1956 | R | 5,292 | 10,644 | 16,016 | |
| 1952 | R | 5,267 | 12,347 | 17,666 | |
| 1948 | R | 5,831 | 7,140 | 13,307 | |
| 1944 | R | 5,690 | 9,751 | 15,546 | |
| 1940 | R | 6,106 | 9,363 | 15,707 | |
| 1936 | D | 8,355 | 5,626 | 14,812 | |
| 1932 | D | 7,638 | 5,063 | 12,867 | |
| 1928 | R | 5,151 | 7,496 | 12,729 | |
| 1924 | R | 555 | 3,935 | 11,052 | |
| 1920 | R | 946 | 8,074 | 9,522 | |
| 1916 | R | 2,257 | 3,779 | 6,334 | |
| 1912 | D | 2,464 | 2,171 | 5,727 | |
| 1908 | R | 2,571 | 3,854 | 6,754 | |
| 1904 | R | 1,914 | 4,805 | 7,115 | |
| 1900 | R | 2,491 | 4,329 | 7,110 | |
| 1896 | R | 2,611 | 4,623 | 7,585 | |
| 1892 | R | 3,139 | 3,277 | 6,862 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Home to Wisconsin Dells and the Baraboo Hills, Sauk County blends a resort economy with small-city manufacturing, producing a voter mix that has swung between parties in every cycle since 2008 — landing at R+1.7 in 2024.
The county's recent history is a story of close margins. The Democratic margin reached twenty-two points in 2008; the Republican margin reached seventy-five points in 1920. Most other elections have been decided by single-digit points.
Sauk County's demographics — a population of 66,009, a 87% non-Hispanic-white share, a median household income of $79,541 — situate the county close to national averages on several dimensions. The county's voting pattern over the last decade is most similar to that of Green County and Clinton County.
