| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 41,826 | 47,478 | 90,680 | |
| 2020 | R | 42,193 | 44,972 | 88,738 | |
| 2016 | R | 35,799 | 36,037 | 76,304 | |
| 2012 | D | 44,867 | 34,977 | 80,897 | |
| 2008 | D | 45,836 | 31,609 | 78,789 | |
| 2004 | D | 40,107 | 35,587 | 76,428 | |
| 2000 | D | 32,429 | 28,891 | 63,709 | |
| 1996 | D | 27,964 | 18,296 | 53,717 | |
| 1992 | D | 27,341 | 19,854 | 61,837 | |
| 1988 | D | 30,089 | 21,661 | 52,129 | |
| 1984 | D | 29,233 | 26,118 | 55,695 | |
| 1980 | D | 26,738 | 24,481 | 55,863 | |
| 1976 | D | 27,585 | 22,349 | 51,250 | |
| 1972 | R | 19,441 | 24,041 | 44,576 | |
| 1968 | D | 21,427 | 17,089 | 42,126 | |
| 1964 | D | 30,522 | 14,764 | 45,356 | |
| 1960 | D | 22,956 | 19,969 | 43,011 | |
| 1956 | R | 17,094 | 21,367 | 38,796 | |
| 1952 | D | 19,768 | 18,917 | 38,827 | |
| 1948 | D | 17,987 | 12,780 | 32,109 | |
| 1944 | D | 18,325 | 12,436 | 31,121 | |
| 1940 | D | 17,174 | 12,182 | 29,777 | |
| 1936 | D | 18,137 | 7,268 | 27,245 | |
| 1932 | D | 14,373 | 7,307 | 23,903 | |
| 1928 | R | 10,638 | 11,330 | 22,363 | |
| 1924 | R | 1,517 | 10,341 | 18,649 | |
| 1920 | R | 1,724 | 9,791 | 12,584 | |
| 1916 | R | 2,813 | 3,537 | 6,937 | |
| 1912 | D | 2,216 | 1,671 | 6,141 | |
| 1908 | R | 2,006 | 3,409 | 6,255 | |
| 1904 | R | 1,592 | 3,293 | 5,411 | |
| 1900 | R | 2,101 | 3,078 | 5,273 | |
| 1896 | R | 1,732 | 2,827 | 4,670 | |
| 1892 | D | 1,928 | 1,628 | 3,641 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Kenosha County backed Obama twice before trending Republican, and its 2024 margin of R+6.2 reflects a broader working-class realignment in Wisconsin's lakefront industrial corridor that analysts watch closely each cycle.
The Democratic margin in Kenosha County has rarely exceeded forty points in modern history; the Republican margin has rarely exceeded sixty-four points. 2024 delivered the county to the Republican candidate by six points.
Kenosha County's demographics resemble the country more than they resemble most counties. A 75% non-Hispanic-white share, a 11% poverty rate, and a median household income of $81,239 — all within the broad national range. The county's voting pattern over the last decade is most similar to that of Dubuque County and Cerro Gordo County.
