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Mason City, IA

North Iowa's regional hub where rural-to-urban migration shapes the ballot

Mason City anchors a trade-area economy built on manufacturing and agriculture, producing a competitive mix of working-class voters that has swung presidential margins by double digits across recent cycles.

Presidential margin · 2024
Data unavailable for this race.
Race data unavailable
Geography
Race data unavailable
No current race for this office.
2024FIPS 32380
Population207K
Median ageU.S. 38.9y
42.5y▲ 3.6
Bachelor's+U.S. 35%
20.9%▼ 14.0
  • White92.6%
  • Hispanic3.7%
  • Two or more2.3%
  • Black1.3%
  • Asian0.8%
  • Other0.8%
Trajectory · 2008–2024
Mason City, IABaseline
Reagan → Bush IIObama → TrumpR+20R+100D+10D+20D+302020flip · 2016D+30R+20
Cycle2024
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Constituent Counties

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Similarity Explorer

Similar metro areas

Reads like Sandusky, OH, Grand Rapids, MN, and Rice Lake, WI.
8 visible matches
Constituent Geography

Counties in Mason City, IA

2024 presidential results across the counties that make up this geography.
Sort:
CountyPop.MarginDemRepTotalShare
Cerro Gordo46K
R+11.6
9,95512,62723,02021.1%
Cerro Gordo44K
R+11.6
9,95512,62723,02021.1%
Cerro Gordo43K
R+11.6
9,95512,62723,02021.1%
Cerro Gordo43K
R+11.6
9,95512,62723,02021.1%
Worth8K
R+28.1
1,5082,7154,2873.9%
Worth8K
R+28.1
1,5082,7154,2873.9%
Worth8K
R+28.1
1,5082,7154,2873.9%
Worth7K
R+28.1
1,5082,7154,2873.9%
8 countiesTotal votes: 109,228
Historian Query

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Explore Mason City, IA's political evolution with the Historian
Race & Ancestry

Who Lives Here

A race-first Census view with ancestry expansion where source coverage is strong enough to support detail.
Mason City, IACensus 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) 92.6%Hispanic 3.7%Black 1.3%Multiracial 1.2%Asian 0.8%
GroupMason City, IANational
▶White (Non-Hispanic)(13)
92.6%57.4%
▶Hispanic / Latino(10)
3.7%19.3%
▶Black / African American(5)
1.3%12.2%
Multiracial / Other
1.2%4.0%
▶Asian(6)
0.8%6.0%
▶Native American / Alaska Native(1)
0.2%0.9%
▶Middle Eastern / North African(2)
0.1%0.9%
Native Hawaiian / Pacific Islander
0.1%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).

Religious Adherents

Population that are religious adherents:
57.8%(28.9K people)
U.S. Religion Census 2020
Browse all religions

Catholic-Evangelical edge: -10.2pp (vs national 4.5pp). A strongly Evangelical-leaning religious profile, which nationally correlates with Republican-leaning rural and exurban communities.

Ecological pattern — how to read this

Reflects patterns in counties where this religious tradition concentrates — not a claim about individual voters.

Values are derived by joining Religion Census 2020 (U.S. Religion Data Archive) with certified election results at the county level. That means we know what counties with more or fewer of this group did — not how any individual voted.

This is known as ecological inference. It is a valid way to surface geographic correlation but must not be read as a personal-vote claim about anyone in the group.

Tradition% Pop% AdherentsUS PopUS Adherents
Mainline Protestant
27.4%47.4%——
Evangelical Protestant
15.6%27.0%——
Catholic
12.3%21.3%——
Other
2.0%3.4%——
LDS (Mormon)
0.7%1.2%——
Orthodox Christian
0.6%1.0%——
Non-religiousPopulation
42.2%———
Click the chevron to expand denominations. Tradition and denomination rows label both share of total population and share of all religious adherents. Non-religious is shown as a share of total population only.
Explore Mainline Protestant adherence nationally

Who lives in the Mason City, IA metro area? 206,750 residents across 8 counties.

Demographic Comparison

Demographics

Read this geography's profile in three layers: local, state (where available), and national baseline.
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Mason City, IA vs National207K residents

21% of adults hold a bachelor's degree — 12pp below the national average. Places with similar education levels vote R+15 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.
207K
local
207KNational 334.9M
Share of U.S. population
Local vs state vs U.S.
0.06%
local
0.06%National 100%
Voting-age population
Local vs state vs U.S.
37.4%
local
37.4%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.
$49,779
local
$49,779National $83,960
Poverty rate
Local vs state vs U.S.
10.3%
local
10.3%National 12.5%
College degree
Local vs state vs U.S.
20.9%
local
20.9%National 35.6%
Homeownership
Local vs state vs U.S.
72.3%
local
72.3%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.
42.5 yrs
local
42.5 yrsNational 39.1 yrs
Age 18–29
Local vs state vs U.S.
10.0%
local
10.0%National 15.7%
Age 65+
Local vs state vs U.S.
15.0%
local
15.0%National 17.0%
Foreign born
Local vs state vs U.S.
2.0%
local
2.0%National 14.1%
Non-English at home
Local vs state vs U.S.
3.8%
local
3.8%National 22.2%
English only
Local vs state vs U.S.
96.2%
local
96.2%National 77.8%
Voter Turnout

Turnout in Mason City, IA

Turnout % = votes cast ÷ citizen voting-age population (CVAP). Source: CVAP Special Tab 2020-2024.
2024 Turnout
70.1%
vs Previous
-2.3pp
Eligible Non-Voters
12K · 29.9%
Citizen VAP
38,952
History
1988–2024
Ticket-Splitting

Do voters in Mason City, IA split their tickets?

Divergence between offices in the same election reveals persuadable voters.
ConsistencyHeavy splitting (0/100)
2022 Office Comparisons
OfficesMargin AMargin BSplit
Senate vs GovernorR+12.2R+17.75.4pp
Average divergence across office pairs: 19.5pp
Containing Geography

Located In

Mason City, IA sits inside these higher-level geographies.
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