akashic
1876–2024
State Senate District 40·Iowa

Iowa 40th State Senate District has voted Democratic in ten straight presidential cycles.

1876 — 2024·38 elections
IA
Latest
D+10
in 2024
Archetype
Democratic loyalist
since the recent cycles
Population
10,450
2024 ACS

Iowa 40th State Senate District, Iowa: Democratic loyalist district. In 2024, voted D+10%. Republican peak: R+47 in 1924.

Key facts

2024 presidential margin
D+10MIT Election Lab
Political archetype
Democratic loyalistAkashic typology
Population
10,4502024 5-year
Median household income
$77,6492024 5-year
White (non-Hispanic)
83.6%2024 5-year
Black
6.0%2024 5-year
Hispanic / Latino
4.1%2024 5-year
Peak Democratic margin
D+29 in 1964MIT Election Lab
Peak Republican margin
R+47 in 1920MIT Election Lab
2024 results by constituent county
1 counties · 1 D · 0 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
D
+9.9%
3,0152,4645,587
D
+13.7%
3,2202,4255,791
D
+8.9%
2,6782,1995,367
D
+17.7%
3,1162,1645,382
D
+21.5%
3,0911,9825,150
D
+9.9%
2,7462,2465,032
D
+9.2%
2,2221,8364,183
D
+17.5%
2,0671,4073,773
D
+9.4%
1,7521,3734,039
D
+12.9%
1,9531,5053,486
R
−3.2%
1,7511,8663,649
R
−5.5%
1,4521,6473,554
D
+2.3%
1,7381,6593,471
R
−7.4%
1,4251,6593,142
R
−1.6%
1,3581,4052,927
D
+29.4%
1,8229932,818
R
−10.6%
1,2551,5542,810
R
−21.3%
9841,5182,504
R
−17.9%
9911,4262,428
D
+0.3%
9549491,958
R
−0.4%
9609671,934
R
−9.4%
8871,0711,964
D
+1.5%
8968691,809
R
−2.8%
8048511,677
R
−36.8%
5321,1561,695
R
−47.3%
2701,0161,576
R
−47.1%
3159101,264
R
−14.0%
279373670
D
+8.0%
246197614
R
−11.2%
250315581
R
−36.3%
164369565
R
−20.8%
228352595
R
−16.0%
240333583
R
−5.2%
229255501
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Demographics

Race, ethnicity, and ancestry
Click any group to see the ancestries typically reported within it.
German
30.3%
Irish
14.0%
English
11.5%
American
3.8%
French
1.9%
Scottish
1.7%
Italian
1.6%
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: 39.0 in this county, 39.1 nationally
Male
Age
Female
0.7%
85+
1.3%
2.3%
75–84
3.0%
4.8%
65–74
5.2%
6.2%
55–64
6.3%
6.1%
45–54
6.0%
6.7%
35–44
6.7%
6.7%
25–34
6.5%
4.5%
18–24
4.5%
8.4%
5–17
8.3%
2.9%
<5
2.9%
Source · American Community Survey 5-year estimates, 2024 release.
Median household income
2024 inflation-adjusted dollars
$77,649
State Senate District 40 ranks near the middle of US counties.
State Senate District 40$77,649
Iowa$75,059
United States$80,734
Source · American Community Survey 5-year estimates, 2024 release.
Poverty rate
All persons below federal poverty line
9.4%
Child poverty is below the national average.
Children under 1811.1%
Working age (18–64)9.0%
Seniors (65+)7.7%
Source · American Community Survey 5-year estimates, 2024 release.
Language at home
Population aged 5 and older
92.9%
speak English only
Other Indo-European2.3%
Spanish2.2%
Asian & Pacific Islander1.3%
Other languages1.2%
Source · ACS 5-year estimates, 2024.
Religious adherents
Adherents per capita by tradition
Catholic & Orthodox
17.4%
Mainline Protestant
8.6%
Other Christian
7.8%
Methodist
5.5%
Non-Christian
2.6%
Pentecostal & Holiness
1.9%
Baptist
1.1%
Source · 2020 US Religion Census. Remaining 55.1% of residents not counted as adherents by any reporting body.

Iowa 40th State Senate District sits in the Corn Belt. Its political identity has been Democratic for as long as anyone now living can remember. 2 consecutive presidential elections in modern records have gone for the Democratic candidate, often by margins that would be considered landslide territory anywhere else.

The Democratic margin in Iowa 40th State Senate District reached its widest at twenty-nine points in 1964. The margin in 2024 was ten points — still decisive.

Its loyalty is rooted in its place. Median household income of $77,649, a 84% non-Hispanic-white share, and a population of 10,450 together describe a district whose political habits are deeply settled.

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 Senate District 40, Iowa. Akashic. https://akashic.app/sld-upper/19040/. Accessed May 20, 2026. License: CC BY 4.0.
License: CC BY 4.0

Frequently asked questions

How did State Senate District 40, Iowa vote in 2024?
In 2024, State Senate District 40, Iowa voted Democratic by 9.9 points (D+10), carried by the Democratic candidate. Out of 5,587 votes cast, 3,015 went Democratic and 2,464 went Republican.
What is State Senate District 40, Iowa's political archetype?
Akashic classifies State Senate District 40, Iowa as a "Democratic loyalist" district based on its long-arc presidential voting pattern. Across 38 elections in the dataset, the district has voted Democratic 15 times, Republican 19 times, and other 0 times.
When did State Senate District 40, Iowa last vote Republican?
The most recent presidential election in which State Senate District 40, Iowa voted Republican was 1984.
How many people live in State Senate District 40, Iowa?
State Senate District 40, Iowa has a population of 10,450 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in State Senate District 40, Iowa?
Median household income in State Senate District 40, Iowa is $77,649 — below the national median of $80,734. The Iowa state median is $75,059.
What is the political history of State Senate District 40, Iowa?
Akashic tracks 38 presidential elections in State Senate District 40, Iowa from 1876 to 2024. Of those, 15 went Democratic and 19 went Republican. The district's archetype — "Democratic loyalist" — captures the overall trajectory of that voting record.