| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 1,689 | 4,615 | 6,461 | |
| 2020 | R | 1,771 | 4,191 | 6,087 | |
| 2016 | R | 1,180 | 3,297 | 4,743 | |
| 2012 | R | 1,289 | 3,130 | 4,532 | |
| 2008 | R | 1,607 | 2,822 | 4,568 | |
| 2004 | R | 983 | 2,868 | 3,933 | |
| 2000 | R | 758 | 2,656 | 3,656 | |
| 1996 | R | 955 | 1,984 | 3,495 | |
| 1992 | R | 779 | 1,415 | 3,299 | |
| 1988 | R | 878 | 2,045 | 2,980 | |
| 1984 | R | 708 | 2,308 | 3,069 | |
| 1980 | R | 676 | 2,220 | 3,145 | |
| 1976 | R | 870 | 1,688 | 2,610 | |
| 1972 | R | 669 | 1,780 | 2,588 | |
| 1968 | R | 734 | 1,289 | 2,286 | |
| 1964 | R | 1,125 | 1,276 | 2,403 | |
| 1960 | R | 1,010 | 1,456 | 2,469 | |
| 1956 | R | 925 | 1,662 | 2,587 | |
| 1952 | R | 751 | 1,993 | 2,752 | |
| 1948 | R | 1,006 | 1,300 | 2,357 | |
| 1944 | R | 1,022 | 1,278 | 2,313 | |
| 1940 | D | 1,674 | 1,557 | 3,256 | |
| 1936 | D | 1,819 | 1,006 | 2,890 | |
| 1932 | D | 1,764 | 1,097 | 2,976 | |
| 1928 | R | 812 | 1,785 | 2,611 | |
| 1924 | R | 672 | 1,137 | 2,480 | |
| 1920 | R | 877 | 1,672 | 2,646 | |
| 1916 | D | 1,672 | 1,279 | 3,018 | |
| 1912 | D | 822 | 506 | 1,863 | |
| 1908 | D | 1,029 | 964 | 2,065 | |
| 1904 | R | 971 | 1,314 | 2,382 | |
| 1900 | D | 1,298 | 1,030 | 2,348 | |
| 1896 | D | 1,633 | 315 | 1,958 | |
| 1892 | R | 634 | 762 | 1,561 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Madison County's 2024 presidential margin of R+45.3 reflects a pattern common to Montana's sparsely populated ranching counties, where Republican candidates have dominated by wide margins across successive election cycles.
The Republican margin in Madison County reached its widest at fifty-two points in 1984. The margin in 2024 was forty-five points, in line with the county's deep historical pattern.
Madison County's loyalty is rooted in its place. Median household income of $75,250, a 92% non-Hispanic-white share, and a population of 9,223 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 Beaverhead County and Glenn County.
