Lyon County, Iowa
| Donald Trump ✓Republican | 84.2% | 5,899 |
|---|---|---|
| Kamala HarrisDemocratic | 14.6% | 1,023 |
| Robert F Kennedy Jr.We The People | 0.5% | 38 |
| Year | Margin (D minus R) |
|---|---|
| 1892 | +0.9% |
| 1896 | −3.4% |
| 1900 | −12.4% |
| 1904 | −34.7% |
| 1908 | −20.9% |
| 1912 | +17.4% |
| 1916 | −21.2% |
| 1920 | −65.1% |
| 1924 | −33.8% |
| 1928 | −31.8% |
| 1932 | +35.1% |
| 1936 | +22.3% |
| 1940 | −18.8% |
| 1944 | −21.7% |
| 1948 | −6.9% |
| 1952 | −57.3% |
| 1956 | −41.7% |
| 1960 | −47.4% |
| 1964 | −7.4% |
| 1968 | −48.5% |
| 1972 | −45.3% |
| 1976 | −30.4% |
| 1980 | −47.0% |
| 1984 | −49.2% |
| 1988 | −34.4% |
| 1992 | −33.9% |
| 1996 | −35.6% |
| 2000 | −48.8% |
| 2004 | −56.5% |
| 2008 | −45.0% |
| 2012 | −54.6% |
| 2016 | −66.4% |
| 2020 | −67.6% |
| 2024 | −69.6% |
| Year | Total registered | Democratic | Republican | Unaffiliated | Other |
|---|---|---|---|---|---|
| 2008 | 8,675 | 1,260 | 5,243 | 2,170 | 2 |
| 2010 | 8,462 | 1,164 | 5,233 | 2,060 | 5 |
| 2012 | 8,552 | 993 | 5,607 | 1,946 | 6 |
| 2014 | 8,482 | 957 | 5,594 | 1,927 | 4 |
| 2016 | 8,521 | 973 | 5,675 | 1,860 | 13 |
| 2018 | 8,513 | 870 | 5,898 | 1,724 | 21 |
| 2020 | 8,692 | 881 | 6,432 | 1,353 | 26 |
| 2022 | 8,673 | 824 | 6,435 | 1,393 | 21 |
| 2024 | 8,888 | 741 | 6,711 | 1,410 | 26 |
Lyon County, anchored by Rock Rapids in Iowa's northwest corner, recorded an R+69.6 presidential margin in 2024 — among the widest in the state — reflecting a rural, predominantly Dutch Reformed community that has voted heavily Republican for decades.
Across the recorded series it reached a Democratic high of 35.1 points in 1932 and a Republican high of 69.6 points in 2024. Between 2020 and 2024 the county moved 2.0 points toward the Republican candidate; the 2024 margin was 69.6 points.
A population of 12,162, a 93% non-Hispanic-white share, and a median household income of $76,746 describe the county. The county's voting pattern over the last decade is most similar to that of Douglas County and Clay County.
Compare two places, side by side
Twelve curated comparisons line up election history, demographics, and the divergence story for two places at a glance. Browse all comparisons →
Lyon County, Iowa. Akashic. https://akashic.app/county/19119/. Accessed May 20, 2026. License: CC BY 4.0.