| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 2,017 | 4,826 | 7,010 | |
| 2020 | R | 2,107 | 4,808 | 7,081 | |
| 2016 | R | 1,912 | 4,455 | 6,772 | |
| 2012 | R | 2,881 | 4,230 | 7,263 | |
| 2008 | R | 3,493 | 4,054 | 7,714 | |
| 2004 | R | 3,443 | 4,917 | 8,480 | |
| 2000 | D | 4,347 | 3,216 | 7,739 | |
| 1996 | D | 3,984 | 3,670 | 8,581 | |
| 1992 | D | 3,925 | 3,363 | 9,136 | |
| 1988 | R | 4,523 | 4,611 | 9,180 | |
| 1984 | R | 3,523 | 5,876 | 9,422 | |
| 1980 | R | 3,521 | 5,921 | 10,104 | |
| 1976 | D | 4,846 | 4,758 | 9,666 | |
| 1972 | R | 4,297 | 5,922 | 10,244 | |
| 1968 | D | 5,357 | 4,214 | 9,878 | |
| 1964 | D | 5,968 | 4,051 | 10,019 | |
| 1960 | R | 4,079 | 5,911 | 9,990 | |
| 1956 | R | 4,614 | 5,216 | 9,830 | |
| 1952 | R | 3,443 | 6,487 | 9,930 | |
| 1948 | D | 4,372 | 3,662 | 8,111 | |
| 1944 | D | 3,842 | 3,610 | 7,452 | |
| 1940 | D | 5,253 | 4,356 | 9,609 | |
| 1936 | D | 5,843 | 2,965 | 9,011 | |
| 1932 | D | 6,246 | 2,995 | 9,346 | |
| 1928 | R | 3,168 | 5,094 | 8,293 | |
| 1924 | R | 851 | 3,466 | 6,494 | |
| 1920 | R | 925 | 2,852 | 5,044 | |
| 1916 | R | 1,662 | 1,828 | 3,635 | |
| 1912 | D | 1,464 | 0 | 3,193 | |
| 1908 | R | 1,105 | 1,776 | 3,036 | |
| 1904 | R | 493 | 1,818 | 2,464 | |
| 1900 | R | 915 | 1,220 | 2,196 | |
| 1896 | R | 915 | 935 | 1,874 | |
| 1892 | R | 206 | 984 | 1,862 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Beadle County's population has declined steadily as agricultural consolidation reduces the need for farm labor, leaving Huron as the lone urban anchor in a county that has shifted toward lopsided Republican margins over the past two decades.
The Republican margin in Beadle County reached its widest at fifty-four points in 1904. The margin in 2024 was forty points, in line with the county's deep historical pattern.
Beadle County's loyalty is rooted in its place. Median household income of $67,681, a 72% non-Hispanic-white share, and a population of 19,309 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 Bon Homme County and Kingsbury County.
