Harrison County, Iowa
Precinct data
Results by precinct
11 precincts · 7,938 votes
Precinct boundaries and identifiers are cycle-specific. This table does not join rows across years without a validated crosswalk.
| Precinct -Jefferson LaGrange LoganJefferson LaGrange Logan | 356 | 995 | 20 | 1,371 | 26.0% | 72.6% | R+46.6 |
|---|---|---|---|---|---|---|---|
| Precinct -Missouri Valley CityMissouri Valley City | 425 | 802 | 27 | 1,254 | 33.9% | 64.0% | R+30.1 |
| Precinct -Boyer Lincoln WoodbineBoyer Lincoln Woodbine | 344 | 785 | 20 | 1,149 | 29.9% | 68.3% | R+38.4 |
| Precinct -St John TwpSt John Twp | 228 | 546 | 8 | 782 | 29.2% | 69.8% | R+40.7 |
| Precinct -Harrison Douglas DunlapHarrison Douglas Dunlap | 224 | 510 | 8 | 742 | 30.2% | 68.7% | R+38.5 |
| Precinct -Cass Union Washington PersiaCass Union Washington Persia | 147 | 510 | 5 | 662 | 22.2% | 77.0% | R+54.8 |
| Precinct -Magnolia CalhounMagnolia Calhoun | 156 | 489 | 12 | 657 | 23.7% | 74.4% | R+50.7 |
| Precinct -Clay Taylor Cincinnati ModaleClay Taylor Cincinnati Modale | 141 | 302 | 7 | 450 | 31.3% | 67.1% | R+35.8 |
| Precinct -Morgan Raglan MondaminMorgan Raglan Mondamin | 104 | 271 | 8 | 383 | 27.2% | 70.8% | R+43.6 |
| Precinct -Jackson Allen PisgahJackson Allen Pisgah | 63 | 264 | 5 | 332 | 19.0% | 79.5% | R+60.5 |
| Precinct -Little SiouxLittle Sioux | 57 | 92 | 7 | 156 | 36.5% | 59.0% | R+22.4 |
Presidential margin, 1892–2024
Democratic minus Republican, by election
| Year | Margin (D minus R) |
|---|---|
| 1892 | −2.0% |
| 1896 | +6.1% |
| 1900 | −7.4% |
| 1904 | −30.8% |
| 1908 | −8.8% |
| 1912 | +11.8% |
| 1916 | +5.7% |
| 1920 | −27.2% |
| 1924 | −19.0% |
| 1928 | −11.9% |
| 1932 | +35.6% |
| 1936 | +7.6% |
| 1940 | −6.8% |
| 1944 | −9.2% |
| 1948 | +3.0% |
| 1952 | −27.8% |
| 1956 | −16.8% |
| 1960 | −15.5% |
| 1964 | +17.6% |
| 1968 | −21.3% |
| 1972 | −32.8% |
| 1976 | −3.8% |
| 1980 | −33.3% |
| 1984 | −27.0% |
| 1988 | −3.7% |
| 1992 | −6.0% |
| 1996 | −7.6% |
| 2000 | −19.1% |
| 2004 | −23.1% |
| 2008 | −4.7% |
| 2012 | −12.7% |
| 2016 | −36.7% |
| 2020 | −38.4% |
| 2024 | −41.7% |
U.S. Senate
| Year | Won | Democratic | Republican | Total |
|---|---|---|---|---|
| 2022 | R | 28.5%1,548 | 71.5%3,889 | 5,437 |
| 2020 | R | 32.2%2,574 | 63.2%5,059 | 8,004 |
Registered voters
By party of registration, over time
Registration leans Republican; the presidential vote runs 6.7 points more Democratic.
| Year | Total registered | Democratic | Republican | Unaffiliated | Other |
|---|---|---|---|---|---|
| 2008 | 9,361 | 3,085 | 3,311 | 2,962 | 3 |
| 2010 | 9,341 | 2,793 | 3,761 | 2,779 | 8 |
| 2012 | 8,820 | 2,574 | 3,649 | 2,587 | 10 |
| 2014 | 8,110 | 2,133 | 3,632 | 2,317 | 28 |
| 2016 | 8,515 | 2,144 | 3,830 | 2,496 | 45 |
| 2018 | 8,830 | 2,121 | 3,925 | 2,718 | 66 |
| 2020 | 9,362 | 2,142 | 4,769 | 2,368 | 83 |
| 2022 | 9,017 | 1,863 | 4,801 | 2,270 | 83 |
| 2024 | 9,452 | 1,795 | 5,109 | 2,447 | 101 |
Who moves in and out
Net migration over time, and who arrivals are — where they came from and what those places vote
+69 net domestic migration · 2025
Net −370 over 2011–2025 · gain loss
Arrivals reported $69,408 in average income, against $82,870 for residents who stayed — 16% lower. (IRS SOI, 2022–23)
The places arrivals came from lean R+5.8 on average — 36 points more Democratic-leaning than Harrison County, IA itself (R+41.7).
Where arrivals came from lean of each source
- Pottawattamie County, IA60R+19.9
- Douglas County, NE53D+10.1
Where departures went households, 2022–23
- Pottawattamie County, IA62
- Douglas County, NE59
- Shelby County, IA25
Migration is one input to a place’s political change, not its cause — a shift can also come from residents changing their minds, generational turnover, or turnout. These figures describe the places people moved between; they do not measure how any mover voted.
| Year | Net domestic migration |
|---|---|
| 2011 | −87 |
| 2012 | −267 |
| 2013 | −77 |
| 2014 | −112 |
| 2015 | −86 |
| 2016 | −69 |
| 2017 | +69 |
| 2018 | +6 |
| 2019 | −28 |
| 2021 | +201 |
| 2022 | +22 |
| 2023 | +15 |
| 2024 | −26 |
| 2025 | +69 |
Harrison County, tucked along the Missouri River in western Iowa, has shifted steadily toward lopsided Republican margins over the past two decades, with its 2024 presidential gap of 41.7 points reflecting a broader rural consolidation pattern across the western tier of the state.
Across the recorded series it reached a Democratic high of 35.6 points in 1932 and a Republican high of 41.7 points in 2024. Between 2020 and 2024 the county moved 3.4 points toward the Republican candidate; the 2024 margin was 41.7 points.
A population of 14,632, a 94% non-Hispanic-white share, and a median household income of $79,535 describe the county. The county's voting pattern over the last decade is most similar to that of Spencer County and Fremont County.
The counties whose fingerprint — 2000–2024 trajectory, demographics, ancestry, religion — sits closest to this one, and why.
Twin score (0–100) = weighted cosine between tier-standardized fingerprints: presidential margins 2000–2024 with 12-yr trend and elasticity, ACS income, age, education, population and race, top reported ancestries, and religious adherence — chips name the closest-shared dimensions and the widest gap. Re-weight the groups in the twins explorer.
Browse places by community — income, education, race & ethnicity, language — all community cuts →
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 →
Harrison County, Iowa. Akashic. https://akashic.app/county/19085/. Accessed May 20, 2026. License: CC BY 4.0.