| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 201 | 1,428 | 1,648 | |
| 2020 | R | 191 | 1,470 | 1,684 | |
| 2016 | R | 153 | 1,385 | 1,597 | |
| 2012 | R | 224 | 1,302 | 1,555 | |
| 2008 | R | 311 | 1,208 | 1,567 | |
| 2004 | R | 268 | 1,426 | 1,733 | |
| 2000 | R | 250 | 1,375 | 1,684 | |
| 1996 | R | 359 | 1,105 | 1,766 | |
| 1992 | R | 311 | 999 | 1,846 | |
| 1988 | R | 435 | 1,336 | 1,783 | |
| 1984 | R | 312 | 1,514 | 1,833 | |
| 1980 | R | 341 | 1,615 | 2,087 | |
| 1976 | R | 557 | 1,241 | 1,836 | |
| 1972 | R | 330 | 1,462 | 1,792 | |
| 1968 | R | 369 | 1,340 | 1,871 | |
| 1964 | R | 885 | 1,272 | 2,157 | |
| 1960 | R | 514 | 1,735 | 2,249 | |
| 1956 | R | 548 | 1,566 | 2,114 | |
| 1952 | R | 543 | 1,950 | 2,493 | |
| 1948 | R | 700 | 1,174 | 1,874 | |
| 1944 | R | 745 | 1,549 | 2,294 | |
| 1940 | R | 975 | 1,783 | 2,758 | |
| 1936 | R | 1,188 | 1,419 | 2,638 | |
| 1932 | D | 1,565 | 1,174 | 2,750 | |
| 1928 | R | 636 | 1,907 | 2,575 | |
| 1924 | R | 714 | 1,104 | 2,452 | |
| 1920 | R | 558 | 1,417 | 2,065 | |
| 1916 | D | 901 | 528 | 1,504 | |
| 1912 | D | 483 | 295 | 1,303 | |
| 1908 | R | 526 | 588 | 1,171 | |
| 1904 | R | 134 | 587 | 829 | |
| 1900 | R | 327 | 470 | 819 | |
| 1896 | R | 290 | 385 | 687 | |
| 1892 | D | 363 | 74 | 775 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Brown County's vast Sandhills ranching landscape anchors an electorate that delivered a 74.7-point Republican margin in 2024, among the widest gaps recorded anywhere in the state that cycle.
The Republican margin in Brown County reached its widest at seventy-seven points in 2016. The margin in 2024 was seventy-four points, in line with the county's deep historical pattern.
Brown County's loyalty is rooted in its place. Median household income of $54,676, a 89% non-Hispanic-white share, and a population of 2,869 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 Custer County and Cherry County.
