| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 20,787 | 33,463 | 55,093 | |
| 2020 | R | 20,918 | 31,541 | 53,375 | |
| 2016 | R | 16,750 | 26,430 | 46,298 | |
| 2012 | R | 21,776 | 22,351 | 44,928 | |
| 2008 | D | 24,640 | 22,225 | 47,734 | |
| 2004 | R | 20,787 | 25,675 | 47,012 | |
| 2000 | R | 18,365 | 20,681 | 40,093 | |
| 1996 | D | 16,924 | 14,168 | 35,619 | |
| 1992 | D | 15,399 | 14,297 | 39,365 | |
| 1988 | R | 13,690 | 19,115 | 33,048 | |
| 1984 | R | 11,012 | 22,409 | 33,597 | |
| 1980 | R | 12,935 | 20,366 | 36,085 | |
| 1976 | R | 14,610 | 18,397 | 33,435 | |
| 1972 | R | 11,018 | 19,125 | 30,654 | |
| 1968 | R | 10,552 | 16,280 | 29,147 | |
| 1964 | D | 16,815 | 11,385 | 28,260 | |
| 1960 | R | 10,785 | 19,859 | 30,719 | |
| 1956 | R | 7,857 | 21,100 | 29,031 | |
| 1952 | R | 7,397 | 20,035 | 27,549 | |
| 1948 | R | 6,529 | 14,369 | 21,291 | |
| 1944 | R | 6,750 | 16,382 | 23,243 | |
| 1940 | R | 7,132 | 16,963 | 24,166 | |
| 1936 | R | 8,299 | 12,154 | 21,435 | |
| 1932 | R | 10,420 | 10,912 | 21,607 | |
| 1928 | R | 4,321 | 14,794 | 19,227 | |
| 1924 | R | 3,950 | 13,358 | 18,388 | |
| 1920 | R | 5,095 | 11,973 | 17,379 | |
| 1916 | R | 5,519 | 6,247 | 12,012 | |
| 1912 | D | 4,239 | 2,996 | 11,089 | |
| 1908 | R | 4,704 | 6,607 | 11,752 | |
| 1904 | R | 3,334 | 7,891 | 11,707 | |
| 1900 | R | 5,966 | 6,847 | 13,232 | |
| 1896 | R | 6,300 | 6,863 | 13,486 | |
| 1892 | R | 5,592 | 5,833 | 12,449 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Lenawee sits in Michigan's southeastern corner, blending small manufacturing towns with agricultural townships. Its R+23 presidential margin in 2024 reflects a decade-long rightward shift driven by working-class rural voters moving away from their ancestral Democratic leanings.
The Republican margin in Lenawee County reached its widest at fifty-four points in 1928. The margin in 2024 was twenty-three points, in line with the county's deep historical pattern.
Lenawee County's loyalty is rooted in its place. Median household income of $70,518, a 87% non-Hispanic-white share, and a population of 98,415 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 Chenango County and Bureau County.