† Citizen voting-age population estimated for prior cycles; 2004 predates the ACS and is extrapolated. Source: ACS 5-year, table B05003.
——
D+60R+60
12 counties by 2024 margin · County returns · MIT Election Lab
People and households
Who lives here
Exact values for this place, its state, and the United States.
Race · ethnicity · ancestry
Communities and origins
GroupRochester-Mason City-AustinUnited States
German32.4%12.5%
Norwegian15.2%—
Irish9.8%9.4%
English7.3%9.5%
American4.2%5.3%
Swedish2.4%—
Polish1.4%2.2%
Dutch1.0%—
Mexican4.5%11.3%
Puerto Rican0.3%1.8%
Salvadoran0.2%0.7%
Colombian0.2%0.4%
Guatemalan0.2%0.5%
African American†2.3%9.9%
Somali0.6%—
African0.3%0.5%
Sudanese0.3%—
Liberian0.2%—
Ethiopian0.2%—
Vietnamese0.6%0.6%
Chinese0.6%1.3%
Burmese0.5%—
Asian Indian0.5%1.4%
Cambodian0.4%—
Filipino0.2%0.9%
Hispanic or Latino counts residents of any race; the race groups count only their non-Hispanic residents, so the groups are mutually exclusive and sum to 100%. Expand a row to see ancestries reported within that group.
Age and life stage
Measure
Rochester-Mason City-Austin
United States
Median age
40.3
39.1
Age 18–24
7.8%
9.2%
Age 65 and older
19.4%
17.2%
Household economy
Measure
Rochester-Mason City-Austin
United States
Median household income
$82,922
$84,427
Poverty rate
8.9%
12.5%
Bachelor's degree or higher (25+)
34.3%
35.6%
Languages at home
Measure
Rochester-Mason City-Austin
United States
Speaks a non-English language at home
10.6%
22.3%
Spanish
3.9%
13.6%
Other Asian & Pacific Island
1.7%
1.1%
Other languages
1.3%
0.8%
Religious landscape
Measure
Rochester-Mason City-Austin
United States
Catholic
14.5%
18.6%
Evangelical Protestant
13.4%
16.5%
Unclaimed / not counted
45.1%
51.5%
Mainline Protestant
24.4%
5.2%
American Community Survey 2024 5-year (CVAP, income, age, poverty, education, language, race, ancestry) · presidential returns from MIT Election Lab through 2024 · 2020 U.S. Religion Census (ASARB) — congregational adherents; unclaimed is the residual not counted by congregations.
Rochester-Mason City-Austin, Iowa
presidential history
Presidential margin, 1892–2024
Democratic minus Republican, by election
Presidential margin over time
Year
Margin (D minus R)
1892
−23.9%
1896
−35.5%
1900
−41.3%
1904
−56.4%
1908
−33.9%
1912
+5.4%
1916
−25.0%
1920
−64.7%
1924
−49.4%
1928
−34.6%
1932
+14.3%
1936
+14.8%
1940
−4.6%
1944
−5.3%
1948
+7.6%
1952
−29.0%
1956
−17.2%
1960
−14.6%
1964
+21.5%
1968
−8.3%
1972
−21.2%
1976
−2.5%
1980
−12.0%
1984
−7.9%
1988
+1.9%
1992
+5.0%
1996
+12.3%
2000
+2.6%
2004
+2.2%
2008
+10.3%
2012
+7.3%
2016
−10.0%
2020
−5.7%
2024
−8.0%
DemocraticRepublican
34 presidential elections
Third column names the leading third-party or independent finisher. Source · MIT Election Lab · ICPSR · VEST (precinct-level 2024). Swing · margin change from the prior cycle. vs U.S. · margin relative to the national result that year.
Year
Won
Democratic
Republican
Other
Margin
Swing
vs U.S.
Total
R
44.9%Harris93,719
52.9%Trump110,451
2.1%
R+8.0
R+2.4
R+6.5
208,625
R
46.1%Biden97,261
51.7%Trump109,192
2.2%
R+5.7
D+4.4
R+10.1
211,049
R
40.6%Clinton78,374
50.6%Trump97,771
8.8%
R+10.0
R+17.4
R+12.1
193,163
D
52.5%Obama101,362
45.1%Romney87,179
2.4%
D+7.3
R+3.0
D+3.5
193,107
D
54.1%Obama104,588
43.8%McCain84,668
2.1%
D+10.3
D+8.1
D+3.0
193,379
D
50.5%Kerry95,891
48.3%Bush91,647
1.2%
D+2.2
R+0.3
D+4.7
189,869
D
49.1%Gore81,690
46.6%Bush77,423
4.3%
D+2.6
R+9.8
D+2.0
166,306
D
49.8%Clinton77,675
37.5%Dole58,433
12.7%
D+12.3
D+7.3
D+3.8
155,823
D
40.3%Clinton69,215
35.2%Bush60,592
24.5%
D+5.0
D+3.1
R+0.5
171,899
D
50.5%Dukakis77,700
48.6%Bush74,744
0.8%
D+1.9
D+9.8
D+9.6
153,745
R
45.7%Mondale73,169
53.6%Reagan85,746
0.7%
R+7.9
D+4.1
D+10.4
160,021
R
39.7%Carter62,539
51.6%Reagan81,405
8.7%
R+12.0
R+9.4
R+2.2
157,700
R
47.7%Carter74,732
50.3%Ford78,719
2.0%
R+2.5
D+18.7
R+4.6
156,517
R
38.5%McGovern56,735
59.7%Nixon87,979
1.7%
R+21.2
R+12.9
D+1.9
147,288
R
43.8%Humphrey61,622
52.1%Nixon73,261
4.1%
R+8.3
R+29.8
R+7.6
140,673
D
60.7%Johnson85,925
39.2%Goldwater55,474
0.2%
D+21.5
D+36.1
R+1.1
141,641
R
42.6%Kennedy62,809
57.2%Nixon84,264
0.1%
R+14.6
D+2.6
R+14.7
147,281
R
41.3%Stevenson55,396
58.5%Eisenhower78,418
0.2%
R+17.2
D+11.8
R+1.8
134,067
R
35.3%Stevenson48,187
64.3%Eisenhower87,784
0.3%
R+29.0
R+36.6
R+18.3
136,445
D
52.9%Truman61,213
45.4%Dewey52,460
1.7%
D+7.6
D+12.8
D+3.1
115,660
R
47.2%Roosevelt52,049
52.5%Dewey57,846
0.4%
R+5.3
R+0.7
R+12.7
110,286
R
47.6%Roosevelt60,784
52.1%Willkie66,636
0.3%
R+4.6
R+19.4
R+14.5
127,828
D
55.6%Roosevelt63,586
40.8%Landon46,623
3.6%
D+14.8
D+0.5
R+9.4
114,319
D
56.3%Roosevelt58,614
42.0%Hoover43,708
1.7%
D+14.3
D+48.9
R+3.5
104,095
R
32.3%Smith31,499
66.9%Hoover65,233
0.8%
R+34.6
D+14.8
R+17.1
97,509
R
8.1%Davis7,409
57.6%Coolidge52,460
34.3%
R+49.4
D+15.3
R+24.2
91,148
R
16.1%Cox12,798
80.8%Harding64,393
3.2%
R+64.7
R+39.7
R+38.5
79,732
R
35.7%Wilson15,248
60.7%Hughes25,918
3.6%
R+25.0
R+30.4
R+28.1
42,691
O
30.1%Wilson12,169
24.7%Taft9,988
45.2%
Roosevelt +15.1
D+39.3
R+14.1
40,412
R
30.6%Bryan12,379
64.5%Taft26,086
4.9%
R+33.9
D+22.6
R+24.3
40,437
R
19.3%Parker7,351
75.8%Roosevelt28,813
4.9%
R+56.4
R+15.2
R+36.8
38,021
R
27.7%Bryan12,346
69.0%McKinley30,730
3.3%
R+41.3
R+5.8
R+33.7
44,544
R
31.1%Bryan14,889
66.6%McKinley31,882
2.3%
R+35.5
R+11.6
R+29.4
47,864
R
33.4%Cleveland12,608
57.3%Harrison21,646
9.3%
R+23.9
—
R+25.6
37,767
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 Democratic.
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 →
Cite this page
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.
