| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 671 | 3,054 | 3,786 | |
| 2020 | R | 688 | 3,136 | 3,901 | |
| 2016 | R | 711 | 2,884 | 3,793 | |
| 2012 | R | 992 | 2,824 | 3,816 | |
| 2008 | R | 1,011 | 3,101 | 4,112 | |
| 2004 | R | 1,222 | 3,199 | 4,421 | |
| 2000 | R | 1,402 | 2,633 | 4,094 | |
| 1996 | R | 1,832 | 2,127 | 4,537 | |
| 1992 | R | 1,564 | 2,209 | 5,052 | |
| 1988 | R | 1,775 | 2,889 | 4,734 | |
| 1984 | R | 1,484 | 4,037 | 5,554 | |
| 1980 | R | 1,399 | 3,708 | 5,264 | |
| 1976 | R | 2,297 | 2,682 | 5,056 | |
| 1972 | R | 963 | 3,958 | 5,092 | |
| 1968 | R | 1,285 | 3,036 | 5,053 | |
| 1964 | R | 2,384 | 2,741 | 5,125 | |
| 1960 | R | 1,725 | 3,646 | 5,371 | |
| 1956 | R | 1,844 | 3,855 | 5,699 | |
| 1952 | R | 1,826 | 4,851 | 6,677 | |
| 1948 | R | 2,595 | 2,835 | 5,430 | |
| 1944 | R | 2,097 | 3,480 | 5,591 | |
| 1940 | R | 3,095 | 4,080 | 7,216 | |
| 1936 | D | 4,242 | 2,877 | 7,196 | |
| 1932 | D | 4,719 | 1,728 | 6,447 | |
| 1928 | R | 1,543 | 3,413 | 5,032 | |
| 1924 | R | 1,488 | 2,255 | 4,647 | |
| 1920 | R | 1,296 | 2,786 | 4,520 | |
| 1916 | R | 1,214 | 1,339 | 3,268 | |
| 1912 | R | 744 | 831 | 1,948 | |
| 1908 | R | 1,317 | 1,598 | 3,272 | |
| 1904 | — | — | — | — | |
| 1900 | — | — | — | — | |
| 1896 | — | — | — | — | |
| 1892 | — | — | — | — | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Blaine County, anchored by wheat-farming plains and a sparse rural population of under 12,000, recorded an R+62.9 presidential margin in 2024—placing it among the most one-sided counties in a state already dominated by wide Republican advantages.
The Republican margin in Blaine County reached its widest at sixty-three points in 2024. The margin in 2024 was sixty-three points, in line with the county's deep historical pattern.
Blaine County's loyalty is rooted in its place. Median household income of $61,642, a 72% non-Hispanic-white share, and a population of 8,570 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 Lincoln County and Union County.