| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 815 | 4,457 | 5,339 | |
| 2020 | R | 811 | 4,525 | 5,470 | |
| 2016 | R | 645 | 4,258 | 5,175 | |
| 2012 | R | 952 | 3,891 | 4,936 | |
| 2008 | R | 1,216 | 3,735 | 5,044 | |
| 2004 | R | 1,055 | 4,129 | 5,258 | |
| 2000 | R | 1,188 | 3,680 | 5,025 | |
| 1996 | R | 1,365 | 3,112 | 5,011 | |
| 1992 | R | 1,166 | 2,500 | 5,342 | |
| 1988 | R | 1,511 | 3,331 | 4,885 | |
| 1984 | R | 1,026 | 4,131 | 5,184 | |
| 1980 | R | 899 | 4,050 | 5,278 | |
| 1976 | R | 1,722 | 2,978 | 4,810 | |
| 1972 | R | 931 | 3,701 | 4,632 | |
| 1968 | R | 1,145 | 3,066 | 4,575 | |
| 1964 | R | 2,416 | 2,740 | 5,156 | |
| 1960 | R | 1,922 | 3,890 | 5,812 | |
| 1956 | R | 1,625 | 3,806 | 5,431 | |
| 1952 | R | 1,631 | 4,433 | 6,064 | |
| 1948 | R | 2,238 | 2,610 | 4,848 | |
| 1944 | R | 2,132 | 3,107 | 5,239 | |
| 1940 | R | 2,481 | 3,119 | 5,600 | |
| 1936 | D | 3,445 | 2,078 | 5,692 | |
| 1932 | D | 3,479 | 1,972 | 5,592 | |
| 1928 | R | 1,770 | 3,559 | 5,384 | |
| 1924 | R | 1,122 | 1,931 | 4,329 | |
| 1920 | R | 1,133 | 1,993 | 3,385 | |
| 1916 | D | 1,418 | 977 | 2,569 | |
| 1912 | D | 923 | 256 | 2,177 | |
| 1908 | D | 1,317 | 1,242 | 2,690 | |
| 1904 | R | 306 | 1,373 | 2,071 | |
| 1900 | R | 905 | 1,192 | 2,157 | |
| 1896 | D | 1,001 | 969 | 2,003 | |
| 1892 | D | 807 | 159 | 1,871 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Red Willow County, anchored by McCook in southwest Nebraska, recorded an R+68.4 presidential margin in 2024 — among the widest in the state — reflecting the deep Republican alignment typical of sparsely populated Great Plains agricultural counties.
The Republican margin in Red Willow County reached its widest at seventy points in 2016. The margin in 2024 was sixty-eight points, in line with the county's deep historical pattern.
Red Willow County's loyalty is rooted in its place. Median household income of $63,697, a 89% non-Hispanic-white share, and a population of 10,557 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 Furnas County and Clay County.
