| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 1,705 | 6,150 | 8,069 | |
| 2020 | R | 1,820 | 5,660 | 7,622 | |
| 2016 | R | 1,218 | 4,286 | 5,953 | |
| 2012 | R | 1,720 | 3,980 | 5,901 | |
| 2008 | R | 1,970 | 3,563 | 5,849 | |
| 2004 | R | 1,502 | 3,461 | 5,153 | |
| 2000 | R | 1,165 | 3,144 | 4,721 | |
| 1996 | R | 1,573 | 2,043 | 4,661 | |
| 1992 | D | 1,689 | 1,361 | 4,506 | |
| 1988 | R | 1,959 | 2,152 | 4,200 | |
| 1984 | R | 1,654 | 2,467 | 4,204 | |
| 1980 | R | 1,395 | 2,194 | 3,999 | |
| 1976 | R | 1,725 | 1,738 | 3,576 | |
| 1972 | R | 1,197 | 1,779 | 3,251 | |
| 1968 | R | 1,242 | 1,459 | 2,996 | |
| 1964 | D | 1,836 | 1,163 | 3,013 | |
| 1960 | R | 1,469 | 1,497 | 2,984 | |
| 1956 | R | 1,519 | 1,649 | 3,168 | |
| 1952 | R | 1,311 | 1,724 | 3,078 | |
| 1948 | D | 1,425 | 1,191 | 2,767 | |
| 1944 | D | 1,184 | 1,070 | 2,278 | |
| 1940 | D | 1,634 | 1,088 | 2,794 | |
| 1936 | D | 1,788 | 718 | 2,735 | |
| 1932 | D | 1,577 | 760 | 2,601 | |
| 1928 | R | 873 | 1,142 | 2,128 | |
| 1924 | R | 188 | 588 | 2,052 | |
| 1920 | R | 741 | 1,035 | 2,010 | |
| 1916 | D | 1,178 | 793 | 2,125 | |
| 1912 | D | 414 | 257 | 1,207 | |
| 1908 | R | 325 | 473 | 860 | |
| 1904 | — | — | — | — | |
| 1900 | — | — | — | — | |
| 1896 | — | — | — | — | |
| 1892 | — | — | — | — | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Sanders County's 2024 presidential margin of R+55.1 places it among Montana's most heavily one-sided jurisdictions, a pattern consistent with its sparse, rural character and a population just above 10,000 spread across the Cabinet Mountains and Clark Fork corridor.
The Democratic margin in Sanders County peaked at thirty-nine points in 1936. By 1996 the county had flipped, voting Republican for the first time in many years. The 2024 margin was fifty-five points, the most Republican-leaning result in the county's modern history.
The economic context is the key. Sanders County's median household income of $57,476 sits well below state and national norms, and 15% 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 Benewah County and Crook County.