| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 888 | 3,771 | 4,703 | |
| 2020 | R | 897 | 3,725 | 4,696 | |
| 2016 | R | 838 | 3,232 | 4,312 | |
| 2012 | R | 1,312 | 2,721 | 4,167 | |
| 2008 | R | 1,814 | 2,654 | 4,564 | |
| 2004 | R | 1,645 | 2,593 | 4,268 | |
| 2000 | R | 1,488 | 2,220 | 3,850 | |
| 1996 | D | 1,487 | 1,464 | 3,468 | |
| 1992 | D | 1,456 | 1,295 | 4,055 | |
| 1988 | R | 1,726 | 2,074 | 3,814 | |
| 1984 | R | 1,382 | 2,678 | 4,060 | |
| 1980 | R | 1,541 | 2,551 | 4,226 | |
| 1976 | D | 2,113 | 2,094 | 4,233 | |
| 1972 | R | 1,231 | 3,167 | 4,398 | |
| 1968 | R | 1,490 | 2,631 | 4,551 | |
| 1964 | D | 2,475 | 2,125 | 4,600 | |
| 1960 | R | 1,736 | 3,115 | 4,851 | |
| 1956 | R | 1,929 | 3,216 | 5,145 | |
| 1952 | R | 1,860 | 3,755 | 5,619 | |
| 1948 | R | 1,985 | 2,687 | 4,676 | |
| 1944 | R | 2,001 | 3,384 | 5,393 | |
| 1940 | R | 2,728 | 3,976 | 6,713 | |
| 1936 | R | 3,014 | 3,792 | 6,813 | |
| 1932 | D | 2,949 | 2,688 | 5,677 | |
| 1928 | R | 2,164 | 4,167 | 6,331 | |
| 1924 | R | 2,383 | 3,545 | 6,043 | |
| 1920 | R | 2,498 | 4,168 | 6,688 | |
| 1916 | R | 1,683 | 2,069 | 3,780 | |
| 1912 | D | 1,483 | 1,187 | 3,674 | |
| 1908 | R | 1,540 | 2,161 | 3,755 | |
| 1904 | R | 1,350 | 2,276 | 3,736 | |
| 1900 | R | 1,722 | 2,235 | 4,078 | |
| 1896 | R | 2,053 | 2,115 | 4,215 | |
| 1892 | R | 1,388 | 1,750 | 3,710 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
With fewer than 9,000 residents and a 2024 presidential margin of R+61.3, Caldwell County sits among Missouri's most heavily one-sided rural counties, where Republican margins have widened steadily over the past two decades.
The Republican margin in Caldwell County reached its widest at sixty-one points in 2024. The margin in 2024 was sixty-one points, in line with the county's deep historical pattern.
Caldwell County's loyalty is rooted in its place. Median household income of $64,806, a 93% non-Hispanic-white share, and a population of 8,927 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 Montgomery County and Crawford County.
