| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 265 | 1,051 | 1,353 | |
| 2020 | R | 275 | 1,040 | 1,344 | |
| 2016 | R | 235 | 872 | 1,208 | |
| 2012 | R | 337 | 854 | 1,215 | |
| 2008 | R | 397 | 801 | 1,236 | |
| 2004 | R | 322 | 944 | 1,286 | |
| 2000 | R | 278 | 1,057 | 1,394 | |
| 1996 | R | 452 | 753 | 1,338 | |
| 1992 | R | 409 | 610 | 1,447 | |
| 1988 | R | 590 | 902 | 1,516 | |
| 1984 | R | 483 | 1,050 | 1,550 | |
| 1980 | R | 480 | 1,030 | 1,627 | |
| 1976 | R | 772 | 809 | 1,614 | |
| 1972 | R | 557 | 961 | 1,614 | |
| 1968 | R | 606 | 804 | 1,516 | |
| 1964 | D | 822 | 678 | 1,502 | |
| 1960 | D | 842 | 721 | 1,564 | |
| 1956 | D | 848 | 789 | 1,637 | |
| 1952 | R | 746 | 1,074 | 1,853 | |
| 1948 | D | 934 | 609 | 1,662 | |
| 1944 | D | 1,049 | 691 | 1,747 | |
| 1940 | D | 1,215 | 670 | 1,913 | |
| 1936 | D | 1,534 | 645 | 2,231 | |
| 1932 | D | 1,280 | 720 | 2,131 | |
| 1928 | R | 978 | 1,342 | 2,364 | |
| 1924 | R | 480 | 888 | 2,148 | |
| 1920 | — | — | — | — | |
| 1916 | — | — | — | — | |
| 1912 | — | — | — | — | |
| 1908 | — | — | — | — | |
| 1904 | — | — | — | — | |
| 1900 | — | — | — | — | |
| 1896 | — | — | — | — | |
| 1892 | — | — | — | — | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Judith Basin county's sparse wheat-farming landscape anchors a reliably one-sided presidential vote — the 2024 margin of R+58 points reflects a pattern consistent across the last several election cycles in Montana's agricultural interior.
The Democratic margin in Judith Basin County peaked at forty points in 1936. By 1968 the county had flipped, voting Republican for the first time in many years. The 2024 margin was fifty-eight points, the most Republican-leaning result in the county's modern history.
The economic context is the key. Judith Basin County's median household income of $59,000 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 Phillips County and Idaho County.