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Akashic

state house district

Iowa 66th State House District

Office (updates table and map)

President margin by year

Place winner margin

1876–2024 · D minus R

Full record · 1876 → 2024

2024

Boundary by 2024 margin · Precinct returns · VEST · MIT Election Lab

The precinct map shows the 2024 presidential vote; the timeline scrubs the district’s overall result across 1892–2024, on its current boundaries.

People and households

Who lives here

Exact values for this place, its state, and the United States.

Race · ethnicity · ancestry

Communities and origins

German39.5%30.5%12.5%

Irish16.2%12.8%9.4%

English7.9%10.2%9.5%

American5.4%4.6%5.3%

Scottish2.2%—1.3%

Italian1.5%1.6%4.8%

Czech1.4%——

Polish1.1%—2.2%

Mexican1.1%5.0%11.3%

Cuban0.3%—0.7%

African American†1.3%2.6%9.9%

African0.2%0.3%0.5%

Hispanic or Latino counts residents of any race; the race groups count only their non-Hispanic residents, so the groups are mutually exclusive and sum to 100%. Expand a row to see ancestries reported within that group.

Age and life stage

Measure	IA HD 66	Iowa	United States
Median age	43.4	38.8	39.1
Age 18–24	7.0%	10.0%	9.2%
Age 65 and older	21.7%	18.1%	17.2%

Household economy

Measure	IA HD 66	Iowa	United States
Median household income	$75,944	$75,059	$84,427
Poverty rate	10.5%	11.1%	12.5%
Bachelor's degree or higher (25+)	20.9%	31.8%	35.6%

Housing and tenure

Measure	IA HD 66	Iowa	United States
Owner-occupied homes	82.0%	71.7%	65.2%
Renter-occupied homes	18.0%	28.3%	34.8%
Median home value	$190,600	$208,000	$332,700
Median gross rent (monthly)	$791	$972	$1,413
Renters paying 30%+ of income	34.5%	43.9%	51.1%
Vacant housing units	10.6%	8.5%	10.1%

Getting to work

Measure	IA HD 66	Iowa	United States
Mean commute	25.2 min	19.8 min	26.4 min
Commutes 60 minutes or more	6.3%	4.1%	8.6%
Drives alone to work	79.1%	76.0%	68.8%
Takes public transit	0.2%	0.7%	3.2%
Works from home	11.5%	11.3%	15.1%

Languages at home

Measure	IA HD 66	Iowa	United States
Speaks a non-English language at home	2.8%	9.2%	22.3%
Spanish	1.7%	4.7%	13.6%

Religious landscape

Measure	IA HD 66	Iowa	United States
Catholic	—	14.7%	18.6%
Evangelical Protestant	—	10.9%	16.5%
Unclaimed / not counted	—	55.2%	51.5%

Origins and service

Measure	IA HD 66	Iowa	United States
Foreign-born residents	1.3%	5.9%	14.1%
Naturalized citizens	0.5%	2.6%	7.4%
Not U.S. citizens	0.8%	3.3%	6.8%
Veterans (18+)	8.1%	6.5%	6.2%
Income inequality (Gini)	0.421	0.444	0.483

American Community Survey 2024 5-year (CVAP, income, age, poverty, education, language, race, ancestry) · 2020 U.S. Religion Census (ASARB) — congregational adherents; unclaimed is the residual not counted by congregations · American Community Survey 2024 — housing and tenure (B25003, B25002, B25077, B25064, B25070), commuting (B08013, B08303, B08301), origins and service (B05002, B21001, B19083).

President results by year

Modeled candidate-vote estimate on current district boundaries

HarrisDemocratic33.6%5,969TrumpRepublican64.6%11,462OtherAll other candidates1.8%315

R+31.0

Lead: 5,493
Total: 17,746
vs nation: R+29.5

modeled Census-place estimatemodeled estimate

BidenDemocratic36.2%6,512TrumpRepublican62.1%11,163OtherAll other candidates1.6%291

R+25.9

Lead: 4,651
Total: 17,966
vs nation: R+30.3

modeled Census-place estimatemodeled estimate

ClintonDemocratic36.0%6,010TrumpRepublican56.8%9,482OtherAll other candidates7.2%1,207

R+20.8

Lead: 3,472
Total: 16,699
vs nation: R+22.9

modeled Census-place estimatemodeled estimate

ObamaDemocratic53.8%8,951RomneyRepublican44.6%7,420OtherAll other candidates1.7%278

D+9.2

Lead: 1,531
Total: 16,649
vs nation: D+5.3

modeled Census-place estimatemodeled estimate

ObamaDemocratic56.1%8,999McCainRepublican42.3%6,782OtherAll other candidates1.6%250

D+13.8

Lead: 2,217
Total: 16,031
vs nation: D+6.6

modeled Census-place estimatemodeled estimate

KerryDemocratic51.8%8,316BushRepublican47.2%7,581OtherAll other candidates0.9%149

D+4.6

Lead: 735
Total: 16,046
vs nation: D+7.0

modeled Census-place estimatemodeled estimate

GoreDemocratic51.5%7,555BushRepublican45.3%6,646OtherAll other candidates3.1%456

D+6.2

Lead: 909
Total: 14,657
vs nation: D+5.7

modeled Census-place estimatemodeled estimate

ClintonDemocratic53.5%7,327DoleRepublican35.9%4,907OtherAll other candidates10.6%1,450

D+17.7

Lead: 2,420
Total: 13,684
vs nation: D+9.2

modeled Census-place estimatemodeled estimate

Key facts

2024 presidential margin: R+31.0MIT Election Lab
Population: 31,9802024 5-year
Population density: 29 / sq mi2024 5-year · TIGER/Line
Land area: 1,104 sq miTIGER/Line
Median household income: $75,9442024 5-year
White (non-Hispanic): 93.5%2024 5-year
Black: 1.6%2024 5-year
Hispanic / Latino: 1.9%2024 5-year
Peak Democratic margin: D+24.5 in 1964MIT Election Lab
Peak Republican margin: R+42.6 in 1920MIT Election Lab
Most similar: State House District 100, IA · twin score 96.4

presidential history

Party record book

Iowa 66th State House District · the strongest Democratic and Republican presidential performances recorded here, measured three ways.

1892–2024 (partial returns from 1876) · 38 presidential cycles · 38 with a vote-share denominator · 34 with a national benchmark

Largest share of the presidential candidate vote cast here.

Democratic

Lyndon B. Johnson1964

62.2%

8,474 votes · D+24.5 · modeled estimate

Runner-up · Franklin D. Roosevelt, 1932 · 59.5%

Republican

Warren G. Harding1920

70.4%

9,041 votes · R+42.6 · modeled estimate

Runner-up · Dwight D. Eisenhower, 1952 · 66.9%

Most votes

Largest number of votes cast for the party’s presidential nominee here.

Democratic

Barack Obama2008

8,999votes

56.1% of the vote · D+13.8 · modeled estimate

Runner-up · Barack Obama, 2012 · 8,951 votes

Republican

Donald Trump2024

11,462votes

64.6% of the vote · R+31.0 · modeled estimate

Runner-up · Donald Trump, 2020 · 11,163 votes

Best relative to the U.S.

This Place’s margin against the national margin in the same election — positive when it leaned toward the party more than the country did.

Democratic

Michael Dukakis1988

+22.1pts D vs U.S.

Place D+14.3 · U.S. R+7.7 · modeled estimate

Runner-up · Bill Clinton, 1996 · +9.2 pts

Republican

Donald Trump2020

+30.3pts R vs U.S.

Place R+25.9 · U.S. D+4.5 · modeled estimate

Runner-up · Donald Trump, 2024 · +29.5 pts

current representation

Current officeholders

RSteve BradleyState House · 66

State legislative officeholder from OpenStates nightly current-legislator data.

U.S. House elections · 3 House

Senate and governor results are in the Office selector at the top of this page.

U.S. House

Each row is a county-allocated estimate of U.S. House votes for this district — county returns apportioned onto its boundary, not precinct-counted. “Vote lead” is the estimated local lead here, not necessarily the winner of the full contest.

Source · Akashic county-allocated estimate from certified county returns, House; not precinct-counted.
Year	Vote lead	Democratic	Republican	Total
2024	R	41.7%6,938	58.3%9,710	16,648
2020	R	39.8%6,728	60.2%10,180	16,908
2018	R	45.8%5,961	54.2%7,057	13,018

With a 2024 presidential margin exceeding 30 points, this rural Iowa district has moved firmly into the GOP's safe column, reflecting broader trends of Republican consolidation across small-town and agricultural communities in the state.

Across the recorded series it reached a Democratic high of 24.5 points in 1964 and a Republican high of 42.6 points in 1920. Between 2020 and 2024 the district moved 5.1 points toward the Republican candidate; the 2024 margin was 31.0 points.

A population of 31,980, a 94% non-Hispanic-white share, and a median household income of $75,944 describe the district. The district's voting pattern over the last decade is most similar to that of State House District 100 and State House District 67.

Political twins — state-house districts

The state-house districts whose fingerprint — 2000–2024 trajectory, demographics, ancestry, religion — sits closest to this one, and why.

State House District 100

12-yr trendelasticity2024 margin

State House District 67

12-yr trendelasticity2020–2024 trajectory≠ Scottish ancestry

State House District 58

12-yr trendelasticity2020–2024 trajectory≠ Norwegian ancestry

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.

District research tools

Open the source-auditable district brief for electoral baseline, electorate, current-cycle coverage, geography, official dates, and methodology. Open campaign intelligence report → · Browse all comparisons →

Cite this page

All citations released under CC BY 4.0. Attribution: Akashic Intelligence.

Iowa 66th State House District. Akashic. https://akashic.app/sld-lower/19066/. Accessed May 20, 2026. License: CC BY 4.0.

License: CC BY 4.0

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Places within Iowa 66th State House District

counties it covers2

Jackson County Jones County

Frequently asked questions

How did Iowa 66th State House District vote in 2024?

In 2024, Iowa 66th State House District voted Republican by 31.0 points (R+31.0), carried by the Republican candidate. Out of 17,746 votes cast, 5,969 went Democratic and 11,462 went Republican.

When did Iowa 66th State House District last vote Democratic?

The most recent presidential election in which Iowa 66th State House District voted Democratic was 2012.

How many people live in Iowa 66th State House District?

Iowa 66th State House District has a population of 31,980 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.

What is the median household income in Iowa 66th State House District?

Median household income in Iowa 66th State House District is $75,944 — below the national median of $80,734. The Iowa state median is $75,059.

What is the political history of Iowa 66th State House District?

Akashic tracks 38 presidential elections in Iowa 66th State House District from 1876 to 2024. Of those, 14 went Democratic and 24 went Republican.