akashic
1876–2024
State House District 66·Iowa

Iowa 66th State House District delivered R+29 in 2024 — close enough to flip again next time.

One of Iowa's most reliably Republican legislative seats

1876 — 2024·38 elections
IA
Latest
R+29
in 2024
Archetype
Tossup
since the recent cycles
Population
37,040
2024 ACS

Iowa 66th State House District, Iowa: Tossup district. In 2024, voted R+29%. Republican peak: R+41 in 1920.

Key facts

2024 presidential margin
R+29MIT Election Lab
Political archetype
TossupAkashic typology
Population
37,0402024 5-year
Median household income
$73,8172024 5-year
White (non-Hispanic)
93.3%2024 5-year
Black
1.8%2024 5-year
Hispanic / Latino
2.2%2024 5-year
Peak Democratic margin
D+26 in 1964MIT Election Lab
Peak Republican margin
R+41 in 1920MIT Election Lab
2024 results by constituent county
2 counties · 0 D · 2 R
R+60
D+60
One cell per constituent county. Ordered by 2024 D-vs-R margin (bluest first). Hover for county-level numbers.
38 presidential elections
Source · MIT Election Lab · ICPSR · VEST (precinct-level 2024).
YearWonMarginDemocraticRepublicanTotal
R
−29.0%
6,91212,71019,973
R
−23.6%
7,56812,35020,260
R
−18.9%
6,98210,56918,982
D
+11.9%
10,4528,19918,977
D
+16.7%
10,5277,46318,293
D
+7.6%
9,7638,36618,313
D
+8.8%
8,8077,33916,663
D
+19.6%
8,5065,43715,626
D
+11.4%
7,1895,29716,648
D
+16.6%
8,6916,19115,040
R
−8.6%
7,4898,91316,568
R
−11.0%
6,4508,23516,202
R
−0.1%
7,9647,97716,230
R
−16.0%
6,5529,10415,951
R
−13.1%
6,2578,28915,533
D
+26.3%
9,7825,70715,504
R
−12.9%
7,5429,77417,324
R
−25.9%
6,00110,24716,381
R
−32.4%
5,55010,95516,672
R
−4.6%
6,6327,28514,154
R
−10.7%
6,5088,06714,598
R
−13.1%
7,78510,14017,973
D
+12.0%
9,1237,12316,702
D
+21.1%
9,1935,90815,577
R
−19.5%
6,0819,03715,183
R
−25.9%
4,1708,03614,915
R
−41.0%
4,0639,92814,293
R
−13.2%
3,7864,9578,865
D
+17.2%
4,0702,5998,564
R
−3.0%
4,2954,5709,070
R
−14.3%
3,9015,2479,401
R
−10.6%
4,4285,48910,017
R
−11.4%
4,8736,14911,175
D
+9.6%
4,9094,0399,101
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Demographics

Race, ethnicity, and ancestry
Click any group to see the ancestries typically reported within it.
German
38.7%
Irish
15.9%
English
7.7%
American
5.3%
Scottish
2.2%
Italian
1.5%
Polish
1.1%
Source · American Community Survey 5-year estimates, 2024 release. Hispanic/Latino is an ethnicity that overlaps the race categories, so these shares can total more than 100%. Ancestry is a self-reported, multiple-response item; ancestry percentages do not sum to the parent race percentage.
Age distribution by sex
Median age: 43.6 in this county, 39.1 nationally
Male
Age
Female
1.1%
85+
1.7%
2.9%
75–84
3.4%
6.3%
65–74
6.3%
7.8%
55–64
7.4%
6.2%
45–54
5.6%
6.6%
35–44
5.4%
6.5%
25–34
4.8%
3.8%
18–24
3.2%
8.3%
5–17
7.5%
2.6%
<5
2.6%
Source · American Community Survey 5-year estimates, 2024 release.
Median household income
2024 inflation-adjusted dollars
$73,817
State House District 66 ranks near the middle of US counties.
State House District 66$73,817
Iowa$75,059
United States$80,734
Source · American Community Survey 5-year estimates, 2024 release.
Poverty rate
All persons below federal poverty line
11.0%
Child poverty is below the national average.
Children under 1814.9%
Working age (18–64)9.8%
Seniors (65+)10.8%
Source · American Community Survey 5-year estimates, 2024 release.
Language at home
Population aged 5 and older
97.2%
speak English only
Spanish1.7%
Other Indo-European0.7%
Asian & Pacific Islander0.3%
Other languages0.1%
Source · ACS 5-year estimates, 2024.
Religious adherents
Adherents per capita by tradition
Catholic & Orthodox
20.9%
Mainline Protestant
20.1%
Methodist
3.4%
Other Christian
3.0%
Baptist
0.7%
Pentecostal & Holiness
0.7%
Source · 2020 US Religion Census. Remaining 51.2% of residents not counted as adherents by any reporting body.

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.

The district's recent history is a story of close margins. The Democratic margin reached twenty-six points in 1964; the Republican margin reached forty-one points in 1920. Most other elections have been decided by single-digit points.

Its demographics — a population of 37,040, a 93% non-Hispanic-white share, a median household income of $73,817 — situate the district close to national averages on several dimensions.

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 →

Cite this page
All citations released under CC BY 4.0. Attribution: Akashic Intelligence.
State House District 66, Iowa. Akashic. https://akashic.app/sld-lower/19066/. Accessed May 20, 2026. License: CC BY 4.0.
License: CC BY 4.0

Frequently asked questions

How did State House District 66, Iowa vote in 2024?
In 2024, State House District 66, Iowa voted Republican by 29.0 points (R+29), carried by the Republican candidate. Out of 19,973 votes cast, 6,912 went Democratic and 12,710 went Republican.
What is State House District 66, Iowa's political archetype?
Akashic classifies State House District 66, Iowa as a "Tossup" district based on its long-arc presidential voting pattern. Across 38 elections in the dataset, the district has voted Democratic 12 times, Republican 22 times, and other 0 times.
When did State House District 66, Iowa last vote Democratic?
The most recent presidential election in which State House District 66, Iowa voted Democratic was 2012.
How many people live in State House District 66, Iowa?
State House District 66, Iowa has a population of 37,040 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in State House District 66, Iowa?
Median household income in State House District 66, Iowa is $73,817 — below the national median of $80,734. The Iowa state median is $75,059.
What is the political history of State House District 66, Iowa?
Akashic tracks 38 presidential elections in State House District 66, Iowa from 1876 to 2024. Of those, 12 went Democratic and 22 went Republican. The district's archetype — "Tossup" — captures the overall trajectory of that voting record.