Marion County, Iowa
Precinct data
Results by precinct
19 precincts · 19,490 votes
Precinct boundaries and identifiers are cycle-specific. This table does not join rows across years without a validated crosswalk.
| Precinct -Knoxville TwpKnoxville Twp | 522 | 1,262 | 30 | 1,814 | 28.8% | 69.6% | R+40.8 |
|---|---|---|---|---|---|---|---|
| Precinct -Pella City Ward 3Pella City Ward 3 | 561 | 1,204 | 24 | 1,789 | 31.4% | 67.3% | R+35.9 |
| Precinct -Pella City Ward 2Pella City Ward 2 | 500 | 1,129 | 23 | 1,652 | 30.3% | 68.3% | R+38.1 |
| Precinct -PleasantvillePleasantville | 509 | 1,106 | 18 | 1,633 | 31.2% | 67.7% | R+36.6 |
| Precinct -Pella City Ward 1Pella City Ward 1 | 500 | 1,037 | 16 | 1,553 | 32.2% | 66.8% | R+34.6 |
| Precinct -Lake PrairieLake Prairie | 297 | 1,160 | 24 | 1,481 | 20.1% | 78.3% | R+58.3 |
| Precinct -Pella City Ward 4Pella City Ward 4 | 447 | 952 | 22 | 1,421 | 31.5% | 67.0% | R+35.5 |
| Precinct -OtleyOtley | 367 | 1,005 | 19 | 1,391 | 26.4% | 72.3% | R+45.9 |
| Precinct -Knoxville City Ward 3Knoxville City Ward 3 | 492 | 765 | 17 | 1,274 | 38.6% | 60.0% | R+21.4 |
| Precinct -Knoxville City Ward 2Knoxville City Ward 2 | 321 | 534 | 8 | 863 | 37.2% | 61.9% | R+24.7 |
| Precinct -DallasDallas | 280 | 569 | 11 | 860 | 32.6% | 66.2% | R+33.6 |
| Precinct -Knoxville City Ward 1Knoxville City Ward 1 | 301 | 508 | 14 | 823 | 36.6% | 61.7% | R+25.2 |
| Precinct -Knoxville City Ward 4Knoxville City Ward 4 | 300 | 424 | 12 | 736 | 40.8% | 57.6% | R+16.8 |
| Precinct -Clay TownshipClay Township | 112 | 431 | 11 | 554 | 20.2% | 77.8% | R+57.6 |
| Precinct -LibertyLiberty | 99 | 350 | 11 | 460 | 21.5% | 76.1% | R+54.6 |
| Precinct -IndianaIndiana | 120 | 294 | 3 | 417 | 28.8% | 70.5% | R+41.7 |
| Precinct -WashingtonWashington | 68 | 247 | 5 | 320 | 21.3% | 77.2% | R+55.9 |
| Precinct -UnionUnion | 92 | 152 | 1 | 245 | 37.6% | 62.0% | R+24.5 |
| Precinct -FranklinFranklin | 40 | 160 | 4 | 204 | 19.6% | 78.4% | R+58.8 |
Presidential margin, 1892–2024
Democratic minus Republican, by election
| Year | Margin (D minus R) |
|---|---|
| 1892 | +4.2% |
| 1896 | +6.4% |
| 1900 | +0.0% |
| 1904 | −14.0% |
| 1908 | +2.0% |
| 1912 | +20.6% |
| 1916 | +11.1% |
| 1920 | −16.4% |
| 1924 | −25.2% |
| 1928 | −20.1% |
| 1932 | +30.6% |
| 1936 | +14.8% |
| 1940 | +9.0% |
| 1944 | +13.2% |
| 1948 | +18.3% |
| 1952 | −15.7% |
| 1956 | −12.4% |
| 1960 | −24.1% |
| 1964 | +33.8% |
| 1968 | −10.6% |
| 1972 | −16.8% |
| 1976 | +6.7% |
| 1980 | −8.7% |
| 1984 | −6.9% |
| 1988 | +7.8% |
| 1992 | −3.9% |
| 1996 | −0.9% |
| 2000 | −18.2% |
| 2004 | −20.5% |
| 2008 | −10.8% |
| 2012 | −13.1% |
| 2016 | −30.5% |
| 2020 | −33.7% |
| 2024 | −37.6% |
U.S. Senate
| Year | Won | Democratic | Republican | Total |
|---|---|---|---|---|
| 2022 | R | 30.7%4,341 | 69.3%9,799 | 14,140 |
| 2020 | R | 32.9%6,269 | 64.1%12,211 | 19,047 |
Registered voters
By party of registration, over time
Registration leans Republican; the presidential vote runs 9.9 points more Democratic.
| Year | Total registered | Democratic | Republican | Unaffiliated | Other |
|---|---|---|---|---|---|
| 2008 | 24,505 | 7,280 | 8,675 | 8,546 | 4 |
| 2010 | 24,690 | 6,838 | 9,277 | 8,566 | 9 |
| 2012 | 24,555 | 6,258 | 9,821 | 8,455 | 21 |
| 2014 | 24,727 | 5,960 | 9,852 | 8,881 | 34 |
| 2016 | 24,509 | 5,795 | 10,221 | 8,406 | 87 |
| 2018 | 23,985 | 5,395 | 10,202 | 8,257 | 131 |
| 2020 | 24,757 | 5,814 | 11,148 | 7,625 | 170 |
| 2022 | 24,676 | 5,291 | 11,377 | 7,830 | 178 |
| 2024 | 25,275 | 4,793 | 11,807 | 8,480 | 195 |
Who moves in and out
Net migration over time, and who arrivals are — where they came from and what those places vote
+269 net domestic migration · 2025
Net +590 over 2011–2025 · gain loss
Arrivals reported $64,332 in average income, against $93,666 for residents who stayed — 31% lower. (IRS SOI, 2022–23)
The places arrivals came from lean R+16.9 on average — 21 points more Democratic-leaning than Marion County, IA itself (R+37.6).
Where arrivals came from lean of each source
- Polk County, IA154D+10.8
- Mahaska County, IA87R+51.4
- Jasper County, IA58R+27.5
- Warren County, IA53R+20.6
- Wapello County, IA31R+31.4
Where departures went households, 2022–23
- Polk County, IA179
- Mahaska County, IA85
- Jasper County, IA69
- Warren County, IA57
- Dallas County, IA33
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 | −40 |
| 2012 | −14 |
| 2013 | −300 |
| 2014 | +188 |
| 2015 | −181 |
| 2016 | −23 |
| 2017 | −83 |
| 2018 | +147 |
| 2019 | −23 |
| 2021 | +48 |
| 2022 | +223 |
| 2023 | +72 |
| 2024 | +307 |
| 2025 | +269 |
Marion County, anchored by Knoxville, sits in south-central Iowa and has shifted steadily rightward over the past two decades, delivering its 2024 presidential margin of R+37.6 — well above the state's already-lopsided statewide result.
Across the recorded series it reached a Democratic high of 33.8 points in 1964 and a Republican high of 37.6 points in 2024. Between 2020 and 2024 the county moved 3.9 points toward the Republican candidate; the 2024 margin was 37.6 points.
A population of 33,642, a 93% non-Hispanic-white share, and a median household income of $78,680 describe the county. The county's voting pattern over the last decade is most similar to that of Bremer County and Mills 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 →
Marion County, Iowa. Akashic. https://akashic.app/county/19125/. Accessed May 20, 2026. License: CC BY 4.0.