Madison County, Iowa
Precinct data
Results by precinct
10 precincts · 9,995 votes
Precinct boundaries and identifiers are cycle-specific. This table does not join rows across years without a validated crosswalk.
| Precinct -Winterset 1 North WardWinterset 1 North Ward | 572 | 1,046 | 14 | 1,632 | 35.0% | 64.1% | R+29.0 |
|---|---|---|---|---|---|---|---|
| Precinct -Union-Crawford-Scott-Lincoln SEUnion-Crawford-Scott-Lincoln SE | 426 | 1,145 | 30 | 1,601 | 26.6% | 71.5% | R+44.9 |
| Precinct -Penn-MadisonPenn-Madison | 390 | 908 | 26 | 1,324 | 29.5% | 68.6% | R+39.1 |
| Precinct -Winterset 2 South WardWinterset 2 South Ward | 486 | 818 | 18 | 1,322 | 36.8% | 61.9% | R+25.1 |
| Precinct -Jefferson-LeeJefferson-Lee | 362 | 704 | 10 | 1,076 | 33.6% | 65.4% | R+31.8 |
| Precinct -SouthSouth | 266 | 668 | 9 | 943 | 28.2% | 70.8% | R+42.6 |
| Precinct -Walnut-OhioWalnut-Ohio | 182 | 609 | 10 | 801 | 22.7% | 76.0% | R+53.3 |
| Precinct -Jackson-Douglas-Lincoln NWJackson-Douglas-Lincoln NW | 183 | 462 | 4 | 649 | 28.2% | 71.2% | R+43.0 |
| Precinct -Grand River-Monroe-Webster-Lincoln SWGrand River-Monroe-Webster-Lincoln SW | 116 | 445 | 1 | 562 | 20.6% | 79.2% | R+58.5 |
| Precinct -Lincoln NELincoln NE | 25 | 59 | 1 | 85 | 29.4% | 69.4% | R+40.0 |
Presidential margin, 1892–2024
Democratic minus Republican, by election
| Year | Margin (D minus R) |
|---|---|
| 1892 | −14.3% |
| 1896 | −1.9% |
| 1900 | −14.7% |
| 1904 | −34.3% |
| 1908 | −25.1% |
| 1912 | −2.4% |
| 1916 | −4.4% |
| 1920 | −39.6% |
| 1924 | −41.0% |
| 1928 | −33.1% |
| 1932 | +4.6% |
| 1936 | −10.8% |
| 1940 | −18.2% |
| 1944 | −18.8% |
| 1948 | −6.2% |
| 1952 | −39.7% |
| 1956 | −18.8% |
| 1960 | −16.6% |
| 1964 | +21.9% |
| 1968 | −16.9% |
| 1972 | −21.2% |
| 1976 | +7.2% |
| 1980 | −12.9% |
| 1984 | −1.6% |
| 1988 | +17.2% |
| 1992 | +1.7% |
| 1996 | +8.2% |
| 2000 | −8.2% |
| 2004 | −14.5% |
| 2008 | −10.0% |
| 2012 | −11.9% |
| 2016 | −30.8% |
| 2020 | −34.3% |
| 2024 | −38.5% |
U.S. Senate
| Year | Won | Democratic | Republican | Total |
|---|---|---|---|---|
| 2022 | R | 32.2%2,405 | 67.8%5,064 | 7,469 |
| 2020 | R | 32.6%3,168 | 64.3%6,245 | 9,717 |
Registered voters
By party of registration, over time
Registration leans Republican; the presidential vote runs 13 points more Democratic.
| Year | Total registered | Democratic | Republican | Unaffiliated | Other |
|---|---|---|---|---|---|
| 2008 | 11,412 | 3,805 | 3,669 | 3,937 | 1 |
| 2010 | 11,499 | 3,461 | 4,033 | 4,001 | 4 |
| 2012 | 11,639 | 3,227 | 4,217 | 4,185 | 10 |
| 2014 | 11,408 | 2,982 | 4,207 | 4,200 | 19 |
| 2016 | 11,582 | 2,880 | 4,562 | 4,097 | 43 |
| 2018 | 11,678 | 2,806 | 4,559 | 4,230 | 83 |
| 2020 | 12,199 | 3,022 | 5,159 | 3,922 | 96 |
| 2022 | 12,355 | 2,800 | 5,339 | 4,111 | 105 |
| 2024 | 12,653 | 2,501 | 5,731 | 4,297 | 124 |
Who moves in and out
Net migration over time, and who arrivals are — where they came from and what those places vote
+118 net domestic migration · 2025
Net +966 over 2011–2025 · gain loss
Arrivals reported $67,385 in average income, against $97,002 for residents who stayed — 31% lower. (IRS SOI, 2022–23)
The places arrivals came from lean R+0.8 on average — 38 points more Democratic-leaning than Madison County, IA itself (R+38.5).
Where arrivals came from lean of each source
- Polk County, IA126D+10.8
- Dallas County, IA85R+4.7
- Warren County, IA57R+20.6
Where departures went households, 2022–23
- Polk County, IA117
- Dallas County, IA70
- Warren County, IA51
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 | −9 |
| 2012 | −147 |
| 2013 | −173 |
| 2014 | +95 |
| 2015 | +78 |
| 2016 | +57 |
| 2017 | +185 |
| 2018 | +196 |
| 2019 | +126 |
| 2021 | +150 |
| 2022 | +241 |
| 2023 | −63 |
| 2024 | +112 |
| 2025 | +118 |
Madison County, best known for its historic covered bridges, has shifted decisively toward Republican presidential candidates over the past two decades, with 2024 margins exceeding 38 points in a county of just over 14,000 residents.
Across the recorded series it reached a Democratic high of 21.9 points in 1964 and a Republican high of 41.0 points in 1924. Between 2020 and 2024 the county moved 4.1 points toward the Republican candidate; the 2024 margin was 38.5 points.
A population of 16,926, a 94% non-Hispanic-white share, and a median household income of $90,855 describe the county. The county's voting pattern over the last decade is most similar to that of Benton County and Guthrie 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 →
Madison County, Iowa. Akashic. https://akashic.app/county/19121/. Accessed May 20, 2026. License: CC BY 4.0.