| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 122 | 1,207 | 1,347 | |
| 2020 | R | 147 | 1,282 | 1,445 | |
| 2016 | R | 127 | 1,197 | 1,374 | |
| 2012 | R | 168 | 1,154 | 1,342 | |
| 2008 | R | 254 | 1,108 | 1,376 | |
| 2004 | R | 239 | 1,144 | 1,406 | |
| 2000 | R | 281 | 1,132 | 1,489 | |
| 1996 | R | 264 | 1,053 | 1,420 | |
| 1992 | R | 347 | 739 | 1,636 | |
| 1988 | R | 600 | 901 | 1,556 | |
| 1984 | R | 419 | 1,274 | 1,725 | |
| 1980 | R | 391 | 1,202 | 1,693 | |
| 1976 | R | 793 | 838 | 1,705 | |
| 1972 | R | 552 | 1,134 | 1,761 | |
| 1968 | R | 563 | 1,002 | 1,717 | |
| 1964 | D | 1,028 | 808 | 1,847 | |
| 1960 | R | 954 | 1,047 | 2,016 | |
| 1956 | R | 633 | 1,324 | 1,964 | |
| 1952 | R | 555 | 1,581 | 2,140 | |
| 1948 | R | 966 | 1,097 | 2,082 | |
| 1944 | R | 658 | 1,342 | 2,007 | |
| 1940 | R | 903 | 1,492 | 2,404 | |
| 1936 | D | 1,442 | 1,007 | 2,501 | |
| 1932 | D | 1,773 | 878 | 2,707 | |
| 1928 | R | 930 | 1,450 | 2,396 | |
| 1924 | R | 542 | 1,320 | 2,233 | |
| 1920 | R | 477 | 1,194 | 1,717 | |
| 1916 | D | 1,189 | 760 | 2,027 | |
| 1912 | D | 509 | 195 | 1,072 | |
| 1908 | R | 631 | 639 | 1,307 | |
| 1904 | R | 293 | 607 | 1,048 | |
| 1900 | D | 499 | 445 | 961 | |
| 1896 | D | 384 | 282 | 697 | |
| 1892 | R | 0 | 463 | 791 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
With roughly 2,800 residents spread across the High Plains, Sheridan County recorded an R+80.3 presidential margin in 2024, placing it among the most one-sided rural counties in the state.
The Republican margin in Sheridan County reached its widest at eighty-one points in 2024. The margin in 2024 was eighty-one points, in line with the county's deep historical pattern.
Sheridan County's loyalty is rooted in its place. Median household income of $73,750, a 93% non-Hispanic-white share, and a population of 2,426 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 Gove County and Decatur County.