| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 2,869 | 4,214 | 7,240 | |
| 2020 | R | 2,976 | 3,947 | 7,063 | |
| 2016 | R | 1,913 | 2,906 | 5,349 | |
| 2012 | R | 2,095 | 2,664 | 4,919 | |
| 2008 | R | 2,405 | 2,772 | 5,296 | |
| 2004 | R | 1,843 | 2,863 | 4,774 | |
| 2000 | R | 1,129 | 2,548 | 3,978 | |
| 1996 | R | 1,564 | 2,089 | 4,278 | |
| 1992 | R | 1,259 | 1,548 | 4,153 | |
| 1988 | R | 1,251 | 1,897 | 3,195 | |
| 1984 | R | 945 | 2,299 | 3,286 | |
| 1980 | R | 926 | 2,041 | 3,272 | |
| 1976 | R | 897 | 1,374 | 2,316 | |
| 1972 | R | 537 | 1,324 | 2,151 | |
| 1968 | R | 534 | 1,160 | 2,002 | |
| 1964 | D | 1,126 | 980 | 2,106 | |
| 1960 | R | 916 | 1,179 | 2,095 | |
| 1956 | R | 511 | 1,285 | 1,796 | |
| 1952 | R | 552 | 1,456 | 2,008 | |
| 1948 | R | 828 | 939 | 1,841 | |
| 1944 | R | 896 | 919 | 1,819 | |
| 1940 | D | 1,165 | 761 | 1,943 | |
| 1936 | D | 1,260 | 575 | 1,980 | |
| 1932 | D | 921 | 443 | 1,456 | |
| 1928 | R | 407 | 774 | 1,195 | |
| 1924 | R | 214 | 486 | 1,198 | |
| 1920 | R | 322 | 493 | 815 | |
| 1916 | — | — | — | — | |
| 1912 | — | — | — | — | |
| 1908 | — | — | — | — | |
| 1904 | — | — | — | — | |
| 1900 | — | — | — | — | |
| 1896 | — | — | — | — | |
| 1892 | — | — | — | — | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Valley County's small electorate spans McCall's recreation economy and surrounding agricultural land, producing consistent Republican margins while seasonal-resident patterns complicate year-round voter composition.
The Republican margin in Valley County reached its widest at forty-five points in 1952. The margin in 2024 was nineteen points, in line with the county's deep historical pattern.
Valley County's loyalty is rooted in its place. Median household income of $76,078, a 91% non-Hispanic-white share, and a population of 12,389 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 Chouteau County and Rio Grande County.
