HarrisDemocratic42.0%11,463TrumpRepublican56.2%15,342OtherAll other candidates1.8%502
R+14.2- Lead
- 3,879
- Total
- 27,307
- vs nation
- R+12.7
Akashicmetro area
Mason City, IA
Office (updates table and map)
President margin by year
Place winner margin
2 counties by 2024 margin · County returns · MIT Election Lab
President results by year
Vote totals, margins, and source status
BidenDemocratic44.4%12,537TrumpRepublican53.8%15,180OtherAll other candidates1.8%502
R+9.4- Lead
- 2,643
- Total
- 28,219
- vs nation
- R+13.8
ClintonDemocratic41.5%11,392TrumpRepublican51.3%14,074OtherAll other candidates7.2%1,976
R+9.8- Lead
- 2,682
- Total
- 27,442
- vs nation
- R+11.9
ObamaDemocratic56.0%15,666RomneyRepublican42.4%11,872OtherAll other candidates1.6%458
D+13.6- Lead
- 3,794
- Total
- 27,996
- vs nation
- D+9.7
ObamaDemocratic59.8%16,972McCainRepublican38.7%10,987OtherAll other candidates1.5%438
D+21.1- Lead
- 5,985
- Total
- 28,397
- vs nation
- D+13.8
KerryDemocratic54.7%15,658BushRepublican44.5%12,755OtherAll other candidates0.8%226
D+10.1- Lead
- 2,903
- Total
- 28,639
- vs nation
- D+12.6
GoreDemocratic55.0%14,393BushRepublican42.3%11,056OtherAll other candidates2.7%717
D+12.8- Lead
- 3,337
- Total
- 26,166
- vs nation
- D+12.2
ClintonDemocratic56.4%14,236DoleRepublican34.5%8,711OtherAll other candidates9.1%2,292
D+21.9- Lead
- 5,525
- Total
- 25,239
- vs nation
- D+13.4
Key facts
- 2024 presidential margin
- R+14.2MIT Election Lab
- Population
- 49,9822024 5-year
- Population density
- 52 / sq mi2024 5-year · TIGER/Line
- Land area
- 968 sq miTIGER/Line
- Median household income
- $69,6332024 5-year
- White (non-Hispanic)
- 88.9%2024 5-year
- Black
- 1.7%2024 5-year
- Hispanic / Latino
- 5.3%2024 5-year
- Peak Democratic margin
- D+24.9 in 1964MIT Election Lab
- Peak Republican margin
- R+59.3 in 1920MIT Election Lab
- Most similar
- Albert Lea, MN · twin score 93.8
presidential history
Party record book
Mason City, IA · the strongest Democratic and Republican presidential performances recorded here, measured three ways.
1892–2024 · 34 presidential cycles
Highest vote share
Largest share of the presidential candidate vote cast here.
Democratic
Lyndon B. Johnson1964
62.4%
16,092 votes · D+24.9
Runner-up · Barack Obama, 2008 · 59.8%
Republican
Warren G. Harding1920
78.2%
11,694 votes · R+59.3
Runner-up · Theodore Roosevelt, 1904 · 77.0%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Barack Obama2008
16,972votes
59.8% of the vote · D+21.1
Runner-up · Lyndon B. Johnson, 1964 · 16,092 votes
Republican
Dwight D. Eisenhower1952
16,522votes
61.2% of the vote · R+22.6
Runner-up · Richard Nixon, 1960 · 15,570 votes
Best relative to the U.S.
This Place’s margin against the national margin in the same election — positive when it leaned toward the party more than the country did.
Democratic
Michael Dukakis1988
+24.6pts D vs U.S.
Place D+16.9 · U.S. R+7.7
Runner-up · Walter Mondale, 1984 · +20.5 pts
Republican
William McKinley1900
+39.0pts R vs U.S.
Place R+46.5 · U.S. R+7.5
Runner-up · Theodore Roosevelt, 1904 · +38.9 pts
U.S. House elections · 3 House
Senate and governor results are in the Office selector at the top of this page.
U.S. House
Each row shows U.S. House votes counted inside this Place. “Vote lead” is the local lead here, not necessarily the winner of the full contest.
voter registration
Registered voters
By party of registration, over time
Party registration · 2024R+7.6
Presidential vote · 2024R+14.2
Registration leans Republican; the presidential vote runs 6.6 points more Republican than the rolls.
DemocraticRepublicanUnaffiliatedOther parties
| Year | Total registered | Democratic | Republican | Unaffiliated | Other |
|---|---|---|---|---|---|
| 2008 | 38,205 | 12,816 | 10,034 | 15,348 | 7 |
| 2010 | 37,896 | 12,158 | 10,213 | 15,509 | 16 |
| 2012 | 38,571 | 12,052 | 10,466 | 16,033 | 20 |
| 2014 | 37,963 | 11,464 | 10,295 | 16,159 | 45 |
| 2016 | 37,817 | 11,127 | 10,866 | 15,736 | 88 |
| 2018 | 37,250 | 10,601 | 10,482 | 16,021 | 146 |
| 2020 | 37,451 | 11,340 | 11,170 | 14,707 | 234 |
| 2022 | 37,097 | 10,623 | 11,746 | 14,490 | 238 |
| 2024 | 37,070 | 9,836 | 12,657 | 14,273 | 304 |
domestic migration
Who moves in and out
Net domestic migration over time
+193 net domestic migration · 2025
20112025
Net −1,873 over 2011–2025 · gain loss
| Year | Net domestic migration |
|---|---|
| 2011 | −170 |
| 2012 | −338 |
| 2013 | −180 |
| 2014 | −263 |
| 2015 | −243 |
| 2016 | +154 |
| 2017 | −58 |
| 2018 | −366 |
| 2019 | −193 |
| 2021 | −148 |
| 2022 | −278 |
| 2023 | +45 |
| 2024 | −28 |
| 2025 | +193 |
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.
Across the recorded series it reached a Democratic high of 24.9 points in 1964 and a Republican high of 59.3 points in 1920. Between 2020 and 2024 the metro moved 4.8 points toward the Republican candidate; the 2024 margin was 14.2 points.
A population of 49,982, a 89% non-Hispanic-white share, and a median household income of $69,633 describe the metro. The metro's voting pattern over the last decade is most similar to that of Albert Lea, MN and Rice Lake, WI.
Political twins — metros
The metros whose fingerprint — 2000–2024 trajectory, demographics, ancestry, religion — sits closest to this one, and why.
Albert Lea, MN
93.8twin score
2000–2012 trajectory12-yr trend
Rice Lake, WI
86.4twin score
12-yr trendNorwegian ancestry% White≠ Polish ancestry
Baraboo, WI
85.7twin score
2000–2012 trajectory≠ Norwegian ancestry
Twin score (0–100) = weighted cosine between tier-standardized fingerprints: presidential margins 2000–2024 with 12-yr trend and elasticity, ACS income, age, education, population and race, top reported ancestries, and religious adherence — chips name the closest-shared dimensions and the widest gap. Re-weight the groups in the twins explorer.
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.
Mason City, IA, Iowa. Akashic. https://akashic.app/cbsa/32380/. Accessed May 20, 2026. License: CC BY 4.0.
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Places within Mason City, IA
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Frequently asked questions
How did Mason City, IA, Iowa vote in 2024?
In 2024, Mason City, IA, Iowa voted Republican by 14.2 points (R+14.2), carried by the Republican candidate. Out of 27,307 votes cast, 11,463 went Democratic and 15,342 went Republican.
When did Mason City, IA, Iowa last vote Democratic?
The most recent presidential election in which Mason City, IA, Iowa voted Democratic was 2012.
How many people live in Mason City, IA, Iowa?
Mason City, IA, Iowa has a population of 49,982 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Mason City, IA, Iowa?
Median household income in Mason City, IA, Iowa is $69,633 — below the national median of $80,734. The Iowa state median is $75,059.
What is the political history of Mason City, IA, Iowa?
Akashic tracks 34 presidential elections in Mason City, IA, Iowa from 1892 to 2024. Of those, 15 went Democratic and 18 went Republican.