| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 742 | 4,867 | 5,735 | |
| 2020 | R | 788 | 4,806 | 5,752 | |
| 2016 | R | 604 | 4,067 | 5,317 | |
| 2012 | R | 868 | 4,285 | 5,324 | |
| 2008 | R | 1,108 | 4,045 | 5,310 | |
| 2004 | R | 960 | 4,232 | 5,283 | |
| 2000 | R | 1,004 | 3,720 | 4,918 | |
| 1996 | R | 1,438 | 2,821 | 4,839 | |
| 1992 | R | 1,216 | 2,216 | 4,762 | |
| 1988 | R | 1,469 | 3,258 | 4,780 | |
| 1984 | R | 1,175 | 4,019 | 5,253 | |
| 1980 | R | 1,212 | 3,709 | 5,223 | |
| 1976 | R | 1,618 | 3,117 | 4,747 | |
| 1972 | R | 1,049 | 3,244 | 4,300 | |
| 1968 | R | 1,201 | 2,771 | 4,325 | |
| 1964 | D | 2,690 | 2,668 | 5,358 | |
| 1960 | R | 2,044 | 3,449 | 5,493 | |
| 1956 | R | 1,813 | 3,369 | 5,182 | |
| 1952 | R | 1,755 | 3,859 | 5,620 | |
| 1948 | R | 2,370 | 2,429 | 4,823 | |
| 1944 | R | 2,314 | 2,659 | 4,973 | |
| 1940 | R | 2,594 | 2,859 | 5,475 | |
| 1936 | D | 3,156 | 1,996 | 5,236 | |
| 1932 | R | 2,155 | 2,334 | 4,563 | |
| 1928 | R | 933 | 2,646 | 3,596 | |
| 1924 | R | 1,233 | 2,023 | 3,715 | |
| 1920 | R | 1,082 | 2,157 | 3,278 | |
| 1916 | D | 1,493 | 1,239 | 2,769 | |
| 1912 | R | 691 | 794 | 2,241 | |
| 1908 | R | 1,648 | 2,638 | 4,376 | |
| 1904 | R | 751 | 1,962 | 2,770 | |
| 1900 | R | 479 | 843 | 1,322 | |
| 1896 | D | 591 | 538 | 1,146 | |
| 1892 | — | 0 | 0 | 0 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Big Horn County sits in the Bighorn Basin along Wyoming's northern edge, where a ranching and energy economy anchors a voter profile that has delivered Republican presidential margins above 70 points in recent cycles.
The Democratic margin in Big Horn County peaked at twenty-two points in 1936. By 1968 the county had flipped, voting Republican for the first time in many years. The 2024 margin was seventy-two points, the most Republican-leaning result in the county's modern history.
The economic context is the key. Big Horn County's median household income of $62,101 sits well below state and national norms, and 13% of residents live below the federal poverty line. The shift here is part of a broader realignment of working-class places across the country. The county's voting pattern over the last decade is most similar to that of Niobrara County and Oneida County.