| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 1,038 | 3,716 | 4,874 | |
| 2020 | R | 1,032 | 3,592 | 4,738 | |
| 2016 | R | 733 | 3,011 | 4,096 | |
| 2012 | R | 960 | 3,029 | 4,110 | |
| 2008 | R | 1,061 | 2,938 | 4,105 | |
| 2004 | R | 915 | 3,079 | 4,055 | |
| 2000 | R | 660 | 2,859 | 3,641 | |
| 1996 | R | 1,015 | 2,334 | 3,868 | |
| 1992 | R | 996 | 1,540 | 3,821 | |
| 1988 | R | 1,157 | 2,378 | 3,590 | |
| 1984 | R | 852 | 2,810 | 3,708 | |
| 1980 | R | 794 | 2,646 | 3,699 | |
| 1976 | R | 1,159 | 1,685 | 2,989 | |
| 1972 | R | 526 | 1,812 | 2,923 | |
| 1968 | R | 547 | 1,476 | 2,562 | |
| 1964 | R | 1,067 | 1,496 | 2,563 | |
| 1960 | R | 1,283 | 1,355 | 2,638 | |
| 1956 | R | 1,038 | 1,794 | 2,832 | |
| 1952 | R | 848 | 2,100 | 2,950 | |
| 1948 | R | 864 | 1,037 | 1,938 | |
| 1944 | R | 988 | 1,048 | 2,040 | |
| 1940 | D | 1,664 | 1,412 | 3,077 | |
| 1936 | D | 1,648 | 943 | 2,666 | |
| 1932 | D | 1,332 | 793 | 2,167 | |
| 1928 | R | 837 | 1,139 | 1,994 | |
| 1924 | R | 442 | 1,005 | 1,848 | |
| 1920 | R | 699 | 1,289 | 1,992 | |
| 1916 | D | 1,080 | 723 | 1,884 | |
| 1912 | D | 910 | 669 | 1,999 | |
| 1908 | R | 777 | 809 | 1,655 | |
| 1904 | R | 564 | 786 | 1,418 | |
| 1900 | D | 897 | 529 | 1,449 | |
| 1896 | D | 1,065 | 202 | 1,269 | |
| 1892 | R | 0 | 330 | 575 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Lemhi County stretches across rugged central Idaho terrain with a population under 8,000, and its 2024 presidential margin of R+55 reflects the lopsided partisan patterns typical of sparsely settled mountain-West counties.
The Republican margin in Lemhi County reached its widest at sixty points in 2000. The margin in 2024 was fifty-five points, in line with the county's deep historical pattern.
Lemhi County's loyalty is rooted in its place. Median household income of $53,202, a 92% non-Hispanic-white share, and a population of 8,249 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 Custer County and Shasta County.
