| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 643 | 2,426 | 3,124 | |
| 2020 | R | 727 | 2,338 | 3,109 | |
| 2016 | R | 719 | 2,069 | 2,989 | |
| 2012 | R | 1,251 | 1,583 | 2,900 | |
| 2008 | R | 1,357 | 1,565 | 2,980 | |
| 2004 | R | 1,379 | 1,733 | 3,133 | |
| 2000 | R | 1,300 | 1,666 | 3,021 | |
| 1996 | D | 1,650 | 1,295 | 3,267 | |
| 1992 | D | 1,632 | 1,299 | 3,584 | |
| 1988 | D | 1,988 | 1,467 | 3,477 | |
| 1984 | R | 1,927 | 2,061 | 4,021 | |
| 1980 | R | 1,627 | 2,221 | 4,104 | |
| 1976 | D | 2,145 | 1,781 | 3,995 | |
| 1972 | R | 1,574 | 2,681 | 4,324 | |
| 1968 | R | 1,723 | 2,553 | 4,573 | |
| 1964 | D | 3,062 | 1,994 | 5,062 | |
| 1960 | R | 2,307 | 3,401 | 5,715 | |
| 1956 | R | 2,553 | 3,340 | 5,897 | |
| 1952 | R | 2,497 | 3,995 | 6,525 | |
| 1948 | D | 3,314 | 2,738 | 6,123 | |
| 1944 | R | 3,025 | 3,098 | 6,158 | |
| 1940 | R | 3,625 | 3,748 | 7,401 | |
| 1936 | D | 3,778 | 3,609 | 7,452 | |
| 1932 | D | 3,896 | 2,311 | 6,328 | |
| 1928 | R | 2,579 | 3,911 | 6,578 | |
| 1924 | R | 1,826 | 3,322 | 6,648 | |
| 1920 | R | 2,434 | 4,234 | 6,773 | |
| 1916 | R | 1,935 | 1,936 | 3,977 | |
| 1912 | D | 1,581 | 1,193 | 3,771 | |
| 1908 | R | 1,756 | 2,092 | 4,016 | |
| 1904 | R | 1,452 | 2,290 | 4,081 | |
| 1900 | R | 2,001 | 2,294 | 4,430 | |
| 1896 | D | 2,115 | 2,101 | 4,294 | |
| 1892 | R | 1,561 | 1,825 | 3,737 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Wayne County's R+57.1 margin in 2024 places it among Iowa's most heavily one-sided counties, reflecting broader rural consolidation across the state's southern tier, where small-town agricultural communities have shifted decisively over the past decade.
The Democratic margin in Wayne County peaked at twenty-five points in 1932. By 2000 the county had flipped, voting Republican for the first time in many years. The 2024 margin was fifty-seven points, the most Republican-leaning result in the county's modern history.
The economic context is the key. Wayne County's median household income of $61,964 sits well below state and national norms, and 10% of residents live below the federal poverty line. The shift here is part of a broader realignment of working-class places across the country. The county's voting pattern over the last decade is most similar to that of Keokuk County and Lucas County.