How did IA-SD-18, Iowa vote in the 2024 presidential election?

IA-SD-18, Iowa voted Democratic in 2024 with a margin of D+45.0. Kamala D Harris received 24,380 votes and Donald Trump received 9,061 out of 34,040 total votes cast, a 0.9-point shift toward Republicans from 2020.

What is IA-SD-18, Iowa's political history?

IA-SD-18, 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 6.3 points in 2020.

What are the demographics of IA-SD-18, Iowa?

IA-SD-18, Iowa has a population of 63,978 according to the 2020 Census. The racial composition is 72.9% non-Hispanic white, 7.0% Hispanic, 9.6% Black. About 47% of residents hold a bachelor's degree or higher. Median household income is $73,312.

Which places are most similar to IA-SD-18, Iowa?

Based on demographic and electoral similarity analysis, the three most similar state senate districts to IA-SD-18, Iowa are Washington State Senate District 32, Indiana State Senate District 40, Minnesota State Senate District 61. Similarity is computed using a vector embedding of demographic, economic, and electoral characteristics.

Iowa State Senate District 18

Iowa · Latest: 2024↓ R+0.9 vs 2020

64K residents

Ask Atlas Ask Historian Open in Explore CompareShare image

Presidential margin · 2008 → 2024

Full history

2008
D+34.9
Obama
2012
D+36.6
Obama
2016
D+39.6
Clinton
2020
D+45.9
Biden
2024
D+45.0
Harris

Who lives here

Full breakdown

White72.9%
Black9.6%
Hispanic7.0%

Economy & age

Population: 64K
Median age: 36.6; −2.5pp vs U.S.
Median income: $73K; −$11K vs U.S.
College+: 47%; +11.9pp vs U.S.

Faith & language

Full detail

Catholic13.2%
Evangelical10.6%

87% English only13% Non-English

Similarity Explorer

Similar state senate districts

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

8 visible matches

Washington State Senate District 32WA

Urban Democratic

D+53.0

Similarity score95%

Indiana State Senate District 40IN

Urban Democratic

D+28.1

Similarity score93%

Minnesota State Senate District 61MN

Urban Democratic

D+77.2

Similarity score93%

Oregon State Senate District 21OR

Urban Democratic

D+72.2

Similarity score92%

Kentucky State Senate District 13KY

Urban Democratic

D+33.2

Similarity score92%

Pennsylvania State Senate District 1PA

Urban Democratic

D+60.0

Similarity score92%

Oregon State Senate District 23OR

Urban Democratic

D+67.9

Similarity score91%

Iowa State Senate District 17IA

Urban Democratic

D+35.8

Similarity score91%

Historian Query

Ask the Historian

Explore IA-SD-18's political evolution with the Historian

“How has Iowa State Senate District 18 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-18Census ACS 2024Ancestry detail available

Census race profile

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

Expand rows for ancestry detail

White (Non-Hispanic) 72.9%Black 9.6%Hispanic 7.0%Asian 5.7%Multiracial 4.3%Native American 0.4%

Group	IA-SD-18	State	National
▶White (Non-Hispanic)(13)	72.9%	82.3%	57.4%
▶Black / African American(11)	9.6%	3.9%	12.2%
▶Hispanic / Latino(12)	7.0%	7.3%	19.3%
▶Asian(6)	5.7%	2.5%	6.0%
Multiracial / Other	4.3%	3.5%	4.0%
▶Middle Eastern / North African(6)	0.7%	—	0.9%
▶Native American / Alaska Native(2)	0.4%	0.4%	0.9%
▶Native Hawaiian / Pacific Islander(1)	0.1%	0.2%	0.2%

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.

Click rows to expand ancestry detail. Ancestry from ACS B04006, B03001, B02020, B02016. Totals may differ from race — individuals can report multiple ancestries.

Black / African American (estimated remainder) is derived as Black population share minus reported Sub-Saharan African and West Indian ancestry. It is shown as an estimated ancestry detail, not a standalone Census ancestry category.

MENA estimated from ancestry reporting — Census does not have a separate MENA race category. Not shown in bar (overlaps with other race groups).

Who lives in Iowa State Senate District 18? 63,978 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-18 vs Iowa vs National64K residents

47% of adults hold a bachelor's degree — 14pp above the national average. Places with similar education levels vote D+16 on average nationally.

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.

80.9%

local

80.9%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.

$73,312

local

$73,312State $75,689National $83,960

Poverty rate

Local vs state vs U.S.

10.7%

local

10.7%State 11.1%National 12.5%

College degree

Local vs state vs U.S.

47.5%

local

47.5%State 31.8%National 35.6%

Homeownership

Local vs state vs U.S.

54.9%

local

54.9%State 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.

36.6 yrs

local

36.6 yrsState 38.8 yrsNational 39.1 yrs

Age 18–29

Local vs state vs U.S.

19.7%

local

19.7%State 16.2%National 15.7%

Age 65+

Local vs state vs U.S.

15.4%

local

15.4%State 18.1%National 17.0%

Foreign born

Local vs state vs U.S.

10.0%

local

10.0%State 5.9%National 14.1%

Non-English at home

Local vs state vs U.S.

13.1%

local

13.1%State 9.1%National 22.2%

English only

Local vs state vs U.S.

86.9%

local

86.9%State 90.9%National 77.8%

Voter Turnout

Turnout in IA-SD-18

Turnout % = votes cast ÷ voting-age population (VAP). Source: PL 94-171 2020 Census.

2024 Turnout

65.8%

vs Previous

-4.3pp

Voting-Age Pop

51,741

History

2008–2024

Contained geographies

Counties in IA-SD-18

Counties that overlap IA-SD-18.

Counties

(1)

Polk100%

Other Iowa State Senate Districts

98 total

Name	Margin ↓
IA-SD-45	D+52.4
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-40	D+12.6
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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