| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 1,472 | 4,500 | 6,132 | |
| 2020 | R | 1,693 | 4,216 | 6,049 | |
| 2016 | R | 1,384 | 3,297 | 5,120 | |
| 2012 | R | 2,277 | 2,699 | 5,148 | |
| 2008 | R | 2,521 | 2,953 | 5,666 | |
| 2004 | R | 2,331 | 2,922 | 5,337 | |
| 2000 | R | 2,225 | 2,879 | 5,385 | |
| 1996 | D | 2,981 | 1,588 | 5,954 | |
| 1992 | D | 3,182 | 1,441 | 6,548 | |
| 1988 | D | 3,379 | 2,134 | 5,586 | |
| 1984 | R | 3,033 | 3,156 | 6,284 | |
| 1980 | R | 3,102 | 3,994 | 7,675 | |
| 1976 | R | 3,216 | 3,570 | 6,909 | |
| 1972 | R | 3,020 | 3,868 | 7,207 | |
| 1968 | D | 3,850 | 3,080 | 7,587 | |
| 1964 | D | 5,194 | 2,884 | 8,078 | |
| 1960 | D | 5,001 | 3,432 | 8,433 | |
| 1956 | R | 4,448 | 4,598 | 9,046 | |
| 1952 | R | 4,684 | 5,119 | 9,862 | |
| 1948 | D | 4,472 | 3,200 | 8,261 | |
| 1944 | D | 5,290 | 3,162 | 8,463 | |
| 1940 | D | 6,565 | 3,525 | 10,172 | |
| 1936 | D | 5,377 | 2,146 | 7,582 | |
| 1932 | D | 4,347 | 2,902 | 7,349 | |
| 1928 | R | 2,430 | 3,648 | 6,117 | |
| 1924 | R | 835 | 3,034 | 5,947 | |
| 1920 | R | 1,733 | 3,112 | 4,845 | |
| 1916 | D | 4,239 | 2,431 | 7,171 | |
| 1912 | D | 1,634 | 1,399 | 5,054 | |
| 1908 | R | 2,109 | 3,256 | 5,912 | |
| 1904 | R | 1,116 | 3,695 | 5,588 | |
| 1900 | D | 2,994 | 2,378 | 5,407 | |
| 1896 | D | 1,760 | 497 | 2,261 | |
| 1892 | R | 0 | 936 | 1,912 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Shoshone County anchored Idaho's historic silver-mining boom along the Coeur d'Alene belt, and its working-class industrial past makes it a rare inland Northwest county with a Democratic labor tradition — though recent cycles show that legacy fading fast.
The Democratic margin in Shoshone County peaked at fifty-six points in 1896. By 2000 the county had flipped, voting Republican for the first time in many years. The 2024 margin was forty-nine points, the most Republican-leaning result in the county's modern history.
The economic context is the key. Shoshone County's median household income of $55,527 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 Marion County and Reynolds County.