Rochester-Mason City-Austin · 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
60.7%
85,925 votes · D+21.5
Runner-up · Franklin D. Roosevelt, 1932 · 56.3%
Republican
Warren G. Harding1920
80.8%
64,393 votes · R+64.7
Runner-up · Theodore Roosevelt, 1904 · 75.8%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Barack Obama2008
104,588votes
54.1% of the vote · D+10.3
Runner-up · Barack Obama, 2012 · 101,362 votes
Republican
Donald Trump2024
110,451votes
52.9% of the vote · R+8.0
Runner-up · Donald Trump, 2020 · 109,192 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
Walter Mondale1984
+10.4pts D vs U.S.
Place R+7.9 · U.S. R+18.2
Runner-up · Michael Dukakis, 1988 · +9.6 pts
Republican
Warren G. Harding1920
+38.5pts R vs U.S.
Place R+64.7 · U.S. R+26.2
Runner-up · Theodore Roosevelt, 1904 · +36.8 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
On a multi-state Place, each row sums votes cast in the separate U.S. House races held inside the Place that year. It is a geographic vote total, not one contest or a seat tally.
Rochester-Mason City-Austin · 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 Rochester-Mason City-Austin, by party and cycle.
Party
2008
2012
2016
2020
2024
Democratic
Clinton9Obama37,524 votes · 12 of 12 countiescaucus
Sanders9Clinton311,675 votes · 12 of 12 countiescaucus
Biden5Buttigieg5Klobuchar232,910 votes · 12 of 12 countiescaucus + primary
○no contest record
Republicannot ingested
○no contest record
○no contest record
○no contest record
○no contest record
○no contest record
○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 · 2014R+2.1
vs
Presidential vote · 2024R+8.0
Registration leans Republican; the presidential vote runs 5.9 points more Republican than the rolls.
DemocraticRepublicanUnaffiliatedOther parties
† Some years predate full county coverage; a flagged year sums only the counties reporting it.
Voter registration in Rochester-Mason City-Austin
Year
Total registered
Democratic
Republican
Unaffiliated
Other
2008 (partial)
79,865
24,680
23,130
32,042
13
2010 (partial)
79,471
23,605
23,611
32,223
32
2012 (partial)
79,574
22,742
24,059
32,734
39
2014 (partial)
78,636
21,828
23,514
33,208
86
domestic migration
Who moves in and out
Net domestic migration over time
−37 net domestic migration · 2025
20112025
Net −12,038 over 2011–2025 · gain loss
Domestic migration in Rochester-Mason City-Austin in Rochester-Mason City-Austin: net domestic migration by year
Year
Net domestic migration
2011
−1,341
2012
−1,323
2013
−754
2014
−1,466
2015
−1,643
2016
−231
2017
−330
2018
−226
2019
−497
2021
−708
2022
−1,659
2023
−1,001
2024
−822
2025
−37
This mid-sized media market spans the Minnesota-Iowa border region, where farm-economy concerns and small-city demographics consistently produce competitive margins in statewide races on both sides of the line.
Across the recorded series it reached a Democratic high of 21.5 points in 1964 and a Republican high of 64.7 points in 1920. Between 2020 and 2024 the market moved 2.4 points toward the Republican candidate; the 2024 margin was 8.0 points.
A population of 384,507, a 81% non-Hispanic-white share, and a median household income of $82,922 describe the market. The market's voting pattern over the last decade is most similar to that of La Crosse-Eau Claire and Mankato.
Akashic
Political twins — media markets
The media markets 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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All citations released under CC BY 4.0. Attribution: Akashic Intelligence.
Rochester-Mason City-Austin, Iowa. Akashic. https://akashic.app/dma/611/. Accessed May 20, 2026. License: CC BY 4.0.
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How did Rochester-Mason City-Austin, Iowa vote in 2024?
In 2024, Rochester-Mason City-Austin, Iowa voted Republican by 8.0 points (R+8.0), carried by the Republican candidate. Out of 208,625 votes cast, 93,719 went Democratic and 110,451 went Republican.
When did Rochester-Mason City-Austin, Iowa last vote Democratic?
The most recent presidential election in which Rochester-Mason City-Austin, Iowa voted Democratic was 2012.
How many people live in Rochester-Mason City-Austin, Iowa?
Rochester-Mason City-Austin, Iowa has a population of 384,507 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Rochester-Mason City-Austin, Iowa?
Median household income in Rochester-Mason City-Austin, Iowa is $82,922 — above the national median of $80,734. The Iowa state median is $75,059.
What is the political history of Rochester-Mason City-Austin, Iowa?
Akashic tracks 34 presidential elections in Rochester-Mason City-Austin, Iowa from 1892 to 2024. Of those, 11 went Democratic and 22 went Republican.
