Butler County, Iowa
Precinct data
Results by precinct
8 precincts · 8,027 votes
Precinct boundaries and identifiers are cycle-specific. This table does not join rows across years without a validated crosswalk.
| Precinct -2-CL2-CL | 397 | 957 | 17 | 1,371 | 29.0% | 69.8% | R+40.8 |
|---|---|---|---|---|---|---|---|
| Precinct -6-SR6-SR | 445 | 902 | 20 | 1,367 | 32.6% | 66.0% | R+33.4 |
| Precinct -7-PB7-PB | 318 | 960 | 15 | 1,293 | 24.6% | 74.2% | R+49.7 |
| Precinct -1-GR1-GR | 308 | 678 | 10 | 996 | 30.9% | 68.1% | R+37.1 |
| Precinct -4-AL4-AL | 201 | 719 | 17 | 937 | 21.5% | 76.7% | R+55.3 |
| Precinct -5-AP5-AP | 174 | 598 | 7 | 779 | 22.3% | 76.8% | R+54.4 |
| Precinct -3-DU3-DU | 138 | 592 | 5 | 735 | 18.8% | 80.5% | R+61.8 |
| Precinct -8-NH8-NH | 163 | 378 | 8 | 549 | 29.7% | 68.9% | R+39.2 |
Presidential margin, 1892–2024
Democratic minus Republican, by election
| Year | Margin (D minus R) |
|---|---|
| 1892 | −19.3% |
| 1896 | −33.9% |
| 1900 | −41.9% |
| 1904 | −52.7% |
| 1908 | −41.4% |
| 1912 | +0.7% |
| 1916 | −46.4% |
| 1920 | −74.5% |
| 1924 | −49.2% |
| 1928 | −43.5% |
| 1932 | +14.3% |
| 1936 | +2.4% |
| 1940 | −27.4% |
| 1944 | −30.4% |
| 1948 | −5.7% |
| 1952 | −55.1% |
| 1956 | −42.5% |
| 1960 | −40.4% |
| 1964 | −1.3% |
| 1968 | −45.2% |
| 1972 | −45.6% |
| 1976 | −25.0% |
| 1980 | −38.2% |
| 1984 | −32.5% |
| 1988 | −15.1% |
| 1992 | −9.3% |
| 1996 | +0.4% |
| 2000 | −16.4% |
| 2004 | −18.9% |
| 2008 | −4.7% |
| 2012 | −10.3% |
| 2016 | −36.4% |
| 2020 | −38.5% |
| 2024 | −45.2% |
U.S. Senate
| Year | Won | Democratic | Republican | Total |
|---|---|---|---|---|
| 2022 | R | 27.8%1,669 | 72.2%4,334 | 6,003 |
| 2020 | R | 30.9%2,474 | 66.1%5,291 | 8,007 |
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 | 9,981 | 2,082 | 4,529 | 3,370 | 0 |
| 2010 | 10,145 | 1,999 | 4,709 | 3,435 | 2 |
| 2012 | 10,222 | 1,905 | 4,770 | 3,540 | 7 |
| 2014 | 10,235 | 1,832 | 4,650 | 3,741 | 12 |
| 2016 | 10,116 | 1,816 | 4,678 | 3,595 | 27 |
| 2018 | 10,099 | 1,787 | 4,645 | 3,620 | 47 |
| 2020 | 10,252 | 2,023 | 4,881 | 3,295 | 53 |
| 2022 | 10,196 | 1,908 | 4,892 | 3,326 | 70 |
| 2024 | 10,277 | 1,764 | 5,053 | 3,389 | 71 |
Who moves in and out
Net migration over time, and who arrivals are — where they came from and what those places vote
−10 net domestic migration · 2025
Net −358 over 2011–2025 · gain loss
Arrivals reported $56,621 in average income, against $78,621 for residents who stayed — 28% lower. (IRS SOI, 2022–23)
The places arrivals came from lean R+7.5 on average — 38 points more Democratic-leaning than Butler County, IA itself (R+45.2).
Where arrivals came from lean of each source
- Black Hawk County, IA77D+1.2
- Bremer County, IA46R+22.1
Where departures went households, 2022–23
- Black Hawk County, IA87
- Bremer County, IA50
- Grundy County, IA20
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 | +76 |
| 2012 | +2 |
| 2013 | +18 |
| 2014 | −7 |
| 2015 | −51 |
| 2016 | −152 |
| 2017 | −67 |
| 2018 | −3 |
| 2019 | −53 |
| 2021 | +73 |
| 2022 | −76 |
| 2023 | −39 |
| 2024 | −69 |
| 2025 | −10 |
Butler County's R+45.2 margin in 2024 places it among the most lopsided presidential results in Iowa, reflecting a largely white, agricultural population that has shifted decisively rightward over the past two decades.
Across the recorded series it reached a Democratic high of 14.3 points in 1932 and a Republican high of 74.5 points in 1920. Between 2020 and 2024 the county moved 6.7 points toward the Republican candidate; the 2024 margin was 45.2 points.
A population of 14,268, a 95% non-Hispanic-white share, and a median household income of $73,715 describe the county. The county's voting pattern over the last decade is most similar to that of Hardin County and Adair 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 →
Butler County, Iowa. Akashic. https://akashic.app/county/19023/. Accessed May 20, 2026. License: CC BY 4.0.