| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 131 | 963 | 1,106 | |
| 2020 | R | 154 | 970 | 1,136 | |
| 2016 | R | 127 | 884 | 1,053 | |
| 2012 | R | 170 | 833 | 1,027 | |
| 2008 | R | 208 | 802 | 1,038 | |
| 2004 | R | 154 | 856 | 1,029 | |
| 2000 | R | 115 | 860 | 1,008 | |
| 1996 | R | 236 | 663 | 1,045 | |
| 1992 | R | 258 | 547 | 1,156 | |
| 1988 | R | 395 | 815 | 1,232 | |
| 1984 | R | 346 | 1,066 | 1,429 | |
| 1980 | R | 336 | 985 | 1,443 | |
| 1976 | R | 429 | 683 | 1,235 | |
| 1972 | R | 267 | 844 | 1,217 | |
| 1968 | R | 258 | 699 | 1,076 | |
| 1964 | R | 449 | 649 | 1,099 | |
| 1960 | R | 438 | 665 | 1,105 | |
| 1956 | R | 456 | 700 | 1,156 | |
| 1952 | R | 327 | 888 | 1,222 | |
| 1948 | R | 480 | 784 | 1,303 | |
| 1944 | R | 476 | 650 | 1,137 | |
| 1940 | R | 561 | 633 | 1,212 | |
| 1936 | D | 758 | 545 | 1,349 | |
| 1932 | D | 875 | 515 | 1,450 | |
| 1928 | R | 410 | 780 | 1,199 | |
| 1924 | R | 123 | 480 | 986 | |
| 1920 | R | 330 | 955 | 1,340 | |
| 1916 | — | — | — | — | |
| 1912 | — | — | — | — | |
| 1908 | — | — | — | — | |
| 1904 | — | — | — | — | |
| 1900 | — | — | — | — | |
| 1896 | — | — | — | — | |
| 1892 | — | — | — | — | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Powder River County covers nearly 3,300 square miles of eastern Montana rangeland and recorded one of the widest presidential margins in the state in 2024, reflecting a sparse, agriculture-dependent electorate where Republican candidates have dominated for decades.
The Republican margin in Powder River County reached its widest at seventy-five points in 2024. The margin in 2024 was seventy-five points, in line with the county's deep historical pattern.
Powder River County's loyalty is rooted in its place. Median household income of $67,045, a 91% non-Hispanic-white share, and a population of 1,815 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 Lake County and Blanco County.
