Mason City, IA · how this place’s counties split between candidates in each party’s presidential nominating contest, cycle by cycle. A primary is a contest inside one party, so it has no Democratic–Republican margin and is not part of the general-election record above.
Akashic reports votes cast, not delegates awarded. The two can disagree: Clinton led the 2008 national primary popular vote by less than half a point and did not win the nomination.
Primary returns are published at county grain and there is no roll-up above it. Each cell counts how many of this place’s counties a candidate led — a count of records, not a vote total. Who led the place as a whole is not knowable from these returns, because county rows carry a leader and a lead but no per-candidate votes.
Presidential nominating contests in Mason City, IA, by party and cycle.
○no contest record — Akashic holds no result for that party and cycle here. It is not a claim that no contest was held. Telling apart a contest that was cancelled, one that went uncontested, and one simply not yet ingested needs a nominating-contest calendar, which is a separate ingest from results and does not exist yet.
Republican presidential primaries are not yet ingested — the Republican series runs from 1856 and is in scope. The row is kept so its absence is visible: a Democratic-only panel would otherwise read as though no one else held a contest.
Akashic carries 10 states for 2012 and 3 states for 2024. Cycles in which an incumbent president seeks renomination are thin by nature — few states run a contested primary — so a sparse column is politics, not a hole in the record.
County returns carry a leader and a lead over the runner-up, and nothing more. The full candidate field with vote shares is published at state grain — follow a cycle above to the state contest for it.
voter registration
Registered voters
By party of registration, over time
Party registration · 2024R+7.6
vs
Presidential vote · 2024R+14.2
Registration leans Republican; the presidential vote runs 6.6 points more Republican than the rolls.
DemocraticRepublicanUnaffiliatedOther parties
Voter registration in Mason City, IA
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
Domestic migration in Mason City, IA in Mason City, IA: net domestic migration by year
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.
Akashic
Political twins — metros
The metros whose fingerprint — 2000–2024 trajectory, demographics, ancestry, religion — sits closest to this one, and why.
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 →
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Mason City, IA, Iowa. Akashic. https://akashic.app/cbsa/32380/. Accessed May 20, 2026. License: CC BY 4.0.
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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.
