Iowa County, Iowa
Precinct data
Results by precinct
11 precincts · 9,617 votes
Precinct boundaries and identifiers are cycle-specific. This table does not join rows across years without a validated crosswalk.
| Precinct -Williamsburg CityWilliamsburg City | 797 | 1,081 | 28 | 1,906 | 41.8% | 56.7% | R+14.9 |
|---|---|---|---|---|---|---|---|
| Precinct -Lenox IowaLenox Iowa | 695 | 929 | 19 | 1,643 | 42.3% | 56.5% | R+14.2 |
| Precinct -Marengo CityMarengo City | 473 | 714 | 29 | 1,216 | 38.9% | 58.7% | R+19.8 |
| Precinct -Pilot Troy YorkPilot Troy York | 227 | 594 | 9 | 830 | 27.3% | 71.6% | R+44.2 |
| Precinct -Fillmore GreeneFillmore Greene | 262 | 539 | 9 | 810 | 32.3% | 66.5% | R+34.2 |
| Precinct -Hilton WashingtonHilton Washington | 267 | 531 | 12 | 810 | 33.0% | 65.6% | R+32.6 |
| Precinct -Hartford 2 LincolnHartford 2 Lincoln | 165 | 471 | 17 | 653 | 25.3% | 72.1% | R+46.9 |
| Precinct -English 2English 2 | 209 | 372 | 13 | 594 | 35.2% | 62.6% | R+27.4 |
| Precinct -Honey Creek MarengoHoney Creek Marengo | 105 | 305 | 3 | 413 | 25.4% | 73.8% | R+48.4 |
| Precinct -Hartford 1 SumnerHartford 1 Sumner | 93 | 299 | 4 | 396 | 23.5% | 75.5% | R+52.0 |
| Precinct -Dayton English 1Dayton English 1 | 107 | 233 | 6 | 346 | 30.9% | 67.3% | R+36.4 |
Presidential margin, 1892–2024
Democratic minus Republican, by election
| Year | Margin (D minus R) |
|---|---|
| 1892 | +12.2% |
| 1896 | −9.8% |
| 1900 | −8.0% |
| 1904 | −9.4% |
| 1908 | −7.6% |
| 1912 | +15.0% |
| 1916 | −16.8% |
| 1920 | −41.1% |
| 1924 | −30.6% |
| 1928 | −14.1% |
| 1932 | +23.3% |
| 1936 | +10.4% |
| 1940 | −12.3% |
| 1944 | −11.4% |
| 1948 | −9.0% |
| 1952 | −37.2% |
| 1956 | −27.3% |
| 1960 | −27.2% |
| 1964 | +20.2% |
| 1968 | −21.8% |
| 1972 | −23.3% |
| 1976 | −7.5% |
| 1980 | −20.6% |
| 1984 | −21.2% |
| 1988 | +1.4% |
| 1992 | −1.4% |
| 1996 | +4.4% |
| 2000 | −9.0% |
| 2004 | −8.3% |
| 2008 | +0.2% |
| 2012 | −4.8% |
| 2016 | −23.6% |
| 2020 | −25.3% |
| 2024 | −27.7% |
U.S. Senate
| Year | Won | Democratic | Republican | Total |
|---|---|---|---|---|
| 2022 | R | 34.6%2,539 | 65.4%4,803 | 7,342 |
| 2020 | R | 36.8%3,541 | 60.2%5,794 | 9,624 |
Registered voters
By party of registration, over time
Registration leans Republican; the presidential vote runs 6.3 points more Democratic.
| Year | Total registered | Democratic | Republican | Unaffiliated | Other |
|---|---|---|---|---|---|
| 2008 | 12,011 | 3,109 | 3,610 | 5,292 | 0 |
| 2010 | 12,141 | 3,088 | 3,815 | 5,233 | 5 |
| 2012 | 12,242 | 3,019 | 3,934 | 5,283 | 6 |
| 2014 | 12,133 | 2,812 | 4,026 | 5,277 | 18 |
| 2016 | 12,318 | 2,840 | 4,205 | 5,226 | 47 |
| 2018 | 12,162 | 2,687 | 4,238 | 5,162 | 75 |
| 2020 | 12,474 | 2,930 | 5,007 | 4,440 | 97 |
| 2022 | 12,497 | 2,742 | 5,079 | 4,584 | 92 |
| 2024 | 12,553 | 2,553 | 5,243 | 4,651 | 106 |
Who moves in and out
Net migration over time, and who arrivals are — where they came from and what those places vote
+33 net domestic migration · 2025
Net −272 over 2011–2025 · gain loss
Arrivals reported $57,615 in average income, against $85,357 for residents who stayed — 33% lower. (IRS SOI, 2022–23)
The places arrivals came from lean D+14.6 on average — 42 points more Democratic-leaning than Iowa County, IA itself (R+27.7).
Where arrivals came from lean of each source
- Johnson County, IA92D+37.8
- Linn County, IA57D+9.9
- Benton County, IA39R+33.2
Where departures went households, 2022–23
- Johnson County, IA73
- Linn County, IA65
- Benton County, IA35
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 | −24 |
| 2012 | −167 |
| 2013 | +113 |
| 2014 | +28 |
| 2015 | −52 |
| 2016 | −81 |
| 2017 | −74 |
| 2018 | +33 |
| 2019 | +34 |
| 2021 | −27 |
| 2022 | −47 |
| 2023 | −86 |
| 2024 | +45 |
| 2025 | +33 |
Iowa County sits in a stretch of small agricultural communities where population has drifted downward for decades, a pattern that correlates strongly with the lopsided presidential margins the county has recorded in recent elections.
Across the recorded series it reached a Democratic high of 23.3 points in 1932 and a Republican high of 41.1 points in 1920. Between 2020 and 2024 the county moved 2.4 points toward the Republican candidate; the 2024 margin was 27.7 points.
A population of 16,507, a 93% non-Hispanic-white share, and a median household income of $71,223 describe the county. The county's voting pattern over the last decade is most similar to that of Benton County and Buchanan 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 →
Iowa County. Akashic. https://akashic.app/county/19095/. Accessed May 20, 2026. License: CC BY 4.0.