| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 555 | 2,623 | 3,229 | |
| 2020 | R | 601 | 2,690 | 3,328 | |
| 2016 | R | 552 | 2,531 | 3,251 | |
| 2012 | R | 912 | 2,230 | 3,194 | |
| 2008 | R | 1,037 | 2,027 | 3,127 | |
| 2004 | R | 934 | 2,295 | 3,266 | |
| 2000 | R | 913 | 2,064 | 3,063 | |
| 1996 | R | 1,010 | 1,736 | 3,051 | |
| 1992 | R | 990 | 1,756 | 3,600 | |
| 1988 | R | 1,277 | 1,951 | 3,264 | |
| 1984 | R | 1,146 | 2,285 | 3,463 | |
| 1980 | R | 1,051 | 2,177 | 3,486 | |
| 1976 | R | 1,309 | 1,955 | 3,341 | |
| 1972 | R | 1,317 | 2,262 | 3,616 | |
| 1968 | R | 1,420 | 2,516 | 4,102 | |
| 1964 | D | 2,498 | 1,798 | 4,301 | |
| 1960 | R | 1,814 | 2,965 | 4,782 | |
| 1956 | R | 1,779 | 2,986 | 4,772 | |
| 1952 | R | 1,396 | 3,573 | 4,981 | |
| 1948 | D | 2,123 | 1,772 | 3,939 | |
| 1944 | R | 1,689 | 2,100 | 3,798 | |
| 1940 | R | 2,288 | 2,425 | 4,742 | |
| 1936 | D | 2,812 | 1,539 | 4,453 | |
| 1932 | D | 2,590 | 1,190 | 3,829 | |
| 1928 | R | 1,567 | 2,085 | 3,678 | |
| 1924 | R | 386 | 1,876 | 3,721 | |
| 1920 | R | 754 | 2,717 | 3,541 | |
| 1916 | R | 874 | 1,258 | 2,167 | |
| 1912 | D | 786 | 520 | 1,958 | |
| 1908 | R | 777 | 1,000 | 1,807 | |
| 1904 | R | 554 | 1,179 | 1,750 | |
| 1900 | R | 799 | 1,106 | 1,944 | |
| 1896 | R | 767 | 1,094 | 1,889 | |
| 1892 | R | 674 | 729 | 1,433 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Osceola County, tucked into Iowa's northwest corner, recorded an R+64 presidential margin in 2024 — among the widest in the state — reflecting the deep rural consolidation that has reshaped Iowa's political map over the past decade.
The Republican margin in Osceola County reached its widest at sixty-four points in 2024. The margin in 2024 was sixty-four points, in line with the county's deep historical pattern.
Osceola County's loyalty is rooted in its place. Median household income of $69,239, a 86% non-Hispanic-white share, and a population of 6,100 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 Dixon County and O'Brien County.
