How did IA-SD-40, Iowa vote in the 2024 presidential election?

IA-SD-40, Iowa voted Democratic in 2024 with a margin of D+12.6. Kamala D Harris received 18,970 votes and Donald Trump received 14,636 out of 34,333 total votes cast, a 2.8-point shift toward Republicans from 2020.

What is IA-SD-40, Iowa's political history?

IA-SD-40, Iowa has 5 presidential elections on record, spanning 2008 to 2024. It has voted Democratic in every presidential election since 2008. The largest single-election swing was 7.5 points in 2016.

What are the demographics of IA-SD-40, Iowa?

IA-SD-40, Iowa has a population of 64,145 according to the 2020 Census. The racial composition is 79.9% non-Hispanic white, 3.9% Hispanic, 8.4% Black.

Which places are most similar to IA-SD-40, Iowa?

Based on demographic and electoral similarity analysis, the three most similar state senate districts to IA-SD-40, Iowa are Arkansas State Senate District 14, Utah State Senate District 14, Kentucky State Senate District 26. Similarity is computed using a vector embedding of demographic, economic, and electoral characteristics.

Iowa State Senate District 40

Iowa · Latest: 2024↓ R+2.8 vs 2020

Leans Democratic — 64K residents

Ask Historian Open in Explore CompareShare image

Presidential margin · 2008 → 2024

Full history

2008
D+21.0
Obama
2012
D+17.4
Obama
2016
D+9.9
Clinton
2020
D+15.4
Biden
2024
D+12.6
Harris

Who lives here

Full breakdown

White79.9%
Black8.4%
Multiracial4.6%

Similarity Explorer

Similar state senate districts

Nearest neighbors matched on the same place-page feature set used across the dossier system.

8 visible matches

Arkansas State Senate District 14AR

Urban Competitive 2

D+25.2

Similarity score94%

Utah State Senate District 14UT

Urban Competitive 2

D+31.6

Similarity score92%

Kentucky State Senate District 26KY

Urban Competitive

D+20.4

Similarity score90%

Michigan State Senate District 30MI

Urban Competitive

D+4.3

Similarity score90%

Iowa State Senate District 14IA

Urban Competitive 2

R+0.3

Similarity score89%

Minnesota State Senate District 18MN

Urban Competitive 2

D+4.8

Similarity score89%

Minnesota State Senate District 8MN

Urban Competitive 2

D+39.0

Similarity score89%

Minnesota State Senate District 55MN

Urban Competitive

D+15.4

Similarity score89%

Historian Query

Ask the Historian

Explore IA-SD-40's political evolution with the Historian

“How has Iowa State Senate District 40 voted in presidential elections?”

Race & Ancestry

Who Lives Here

A race-first Census view with ancestry expansion where source coverage is strong enough to support detail.

IA-SD-40Census ACS 2024

Census race profile

Major Census race and ethnicity groups shown as a share of total population.

Expand rows for ancestry detail

White (Non-Hispanic) 79.9%Black 8.4%Multiracial 4.6%Hispanic 3.9%Asian 2.6%Native Hawaiian 0.4%

Group	IA-SD-40	State	National
White (Non-Hispanic)	79.9%	82.3%	57.4%
Black / African American	8.4%	3.9%	12.2%
Multiracial / Other	4.6%	3.5%	4.0%
Hispanic / Latino	3.9%	7.3%	19.3%
Asian	2.6%	2.5%	6.0%
Native Hawaiian / Pacific Islander	0.4%	0.2%	0.2%
Native American / Alaska Native	0.2%	0.4%	0.9%

Method notes

Census treats race and Hispanic/Latino origin as separate questions. Race categories other than Hispanic reflect total populations (small Hispanic overlap in Black, Asian, AIAN, NHPI). “Multiracial / Other” is derived as a non-overlapping remainder.

Detailed ancestry data unavailable for this geography.

Who lives in Iowa State Senate District 40? 64,145 residents as of the 2020 Census.

Demographic Comparison

Demographics

Read this geography's profile in three layers: local, state (where available), and national baseline.

IA-SD-40 vs Iowa vs National64K residents

Population & electorate

Scale, voting-age share, and this geography's footprint inside the national electorate.

Total population

Local vs state vs U.S.

64K

local

64KState 3.2MNational 334.9M

Share of U.S. population

Local vs state vs U.S.

0.02%

local

0.02%National 100%

Voting-age population

Local vs state vs U.S.

77.8%

local

77.8%State 74.1%National 75.7%

Economic profile

Income, attainment, and ownership indicators that often shape coalition structure and turnout behavior.

Median household income

Local vs state vs U.S.

N/A

local

N/AState $75,689National $83,960

Poverty rate

Local vs state vs U.S.

N/A

local

N/AState 11.1%National 12.5%

College degree

Local vs state vs U.S.

N/A

local

N/AState 31.8%National 35.6%

Homeownership

Local vs state vs U.S.

N/A

local

N/AState 71.7%National 65.2%

Community profile

Age structure, language use, and nativity signals that explain how this geography differs from state and nation.

Median age

Local vs state vs U.S.

N/A

local

N/AState 38.8 yrsNational 39.1 yrs

Age 18–29

Local vs state vs U.S.

N/A

local

N/AState 16.2%National 15.7%

Age 65+

Local vs state vs U.S.

N/A

local

N/AState 18.1%National 17.0%

Foreign born

Local vs state vs U.S.

N/A

local

N/AState 5.9%National 14.1%

Non-English at home

Local vs state vs U.S.

N/A

local

N/AState 9.1%National 22.2%

English only

Local vs state vs U.S.

N/A

local

N/AState 90.9%National 77.8%

Voter Turnout

Turnout in IA-SD-40

Turnout % = votes cast ÷ citizen voting-age population (CVAP). Source: CVAP Special Tab 2020-2024.

2024 Turnout

70.9%

vs Previous

-3.1pp

Eligible Non-Voters

14K · 29.1%

Citizen VAP

48,445

History

2008–2024

Competitiveness

How competitive is IA-SD-40?

Likely DAvg margin: D+12.6 (last 3 elections)

2008

D+21.0

2012

D+17.4

2016

D+9.9

2020

D+15.4

2024

D+12.6

Elasticity

11.1pp

margin range

Party Flips

last 30 years

5-Elec Avg

D+15.3

Contained geographies

Counties in IA-SD-40

Counties that overlap IA-SD-40.

Counties

(1)

Linn100%

Other Iowa State Senate Districts

49 total

Name	Margin ↓
IA-SD-45	D+52.4
IA-SD-18	D+45.0
IA-SD-43	D+38.3
IA-SD-17	D+35.8
IA-SD-25	D+27.3
IA-SD-39	D+22.5
IA-SD-16	D+17.3
IA-SD-15	D+16.8
IA-SD-31	D+12.3
IA-SD-37	D+11.3
IA-SD-49	D+8.7
IA-SD-22	D+6.8
IA-SD-36	D+3.0
IA-SD-14	R+0.3
IA-SD-21	R+2.1
IA-SD-20	R+4.5
IA-SD-38	R+5.2
IA-SD-47	R+8.0
IA-SD-10	R+8.4
IA-SD-41	R+11.3
IA-SD-01	R+11.4
IA-SD-46	R+14.2
IA-SD-26	R+15.6
IA-SD-23	R+16.4
IA-SD-50	R+17.5

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