| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 2,675 | 4,476 | 7,248 | |
| 2020 | R | 2,632 | 4,304 | 7,015 | |
| 2016 | R | 2,085 | 3,744 | 6,144 | |
| 2012 | R | 2,652 | 3,397 | 6,117 | |
| 2008 | R | 3,027 | 3,268 | 6,396 | |
| 2004 | R | 2,819 | 3,706 | 6,599 | |
| 2000 | R | 2,533 | 3,272 | 5,970 | |
| 1996 | D | 2,700 | 2,281 | 5,762 | |
| 1992 | D | 2,293 | 2,278 | 5,977 | |
| 1988 | R | 2,093 | 3,127 | 5,242 | |
| 1984 | R | 1,949 | 3,627 | 5,593 | |
| 1980 | R | 2,262 | 3,021 | 5,784 | |
| 1976 | R | 2,452 | 3,107 | 5,627 | |
| 1972 | R | 1,937 | 3,096 | 5,104 | |
| 1968 | R | 1,751 | 2,507 | 4,577 | |
| 1964 | D | 2,748 | 1,967 | 4,717 | |
| 1960 | R | 2,042 | 3,064 | 5,117 | |
| 1956 | R | 1,540 | 3,279 | 4,823 | |
| 1952 | R | 1,285 | 3,058 | 4,354 | |
| 1948 | R | 1,138 | 2,182 | 3,362 | |
| 1944 | R | 1,488 | 2,268 | 3,776 | |
| 1940 | R | 2,075 | 2,591 | 4,679 | |
| 1936 | D | 2,286 | 1,984 | 4,346 | |
| 1932 | D | 2,578 | 1,504 | 4,109 | |
| 1928 | R | 1,355 | 1,879 | 3,243 | |
| 1924 | R | 998 | 1,606 | 3,111 | |
| 1920 | R | 932 | 1,685 | 2,680 | |
| 1916 | R | 908 | 1,082 | 2,027 | |
| 1912 | D | 730 | 612 | 1,767 | |
| 1908 | R | 769 | 1,156 | 1,963 | |
| 1904 | R | 503 | 1,191 | 1,722 | |
| 1900 | R | 632 | 1,059 | 1,716 | |
| 1896 | R | 804 | 806 | 1,654 | |
| 1892 | D | 855 | 478 | 1,350 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Mackinac County's population of under 12,000 is spread across forests, shoreline, and the sovereign lands of the Sault Ste. Marie Tribe of Chippewa Indians, producing a rural electorate that has shifted steadily toward Republican margins over the past two decades.
The Republican margin in Mackinac County reached its widest at forty-one points in 1952. The margin in 2024 was twenty-five points, in line with the county's deep historical pattern.
Mackinac County's loyalty is rooted in its place. Median household income of $63,909, a 72% non-Hispanic-white share, and a population of 10,957 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 Luce County and Crawford County.