† Citizen voting-age population estimated for prior cycles; 2004 predates the ACS and is extrapolated. Source: ACS 5-year, table B05003.
——
D+60R+60
23 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
GroupSioux CityUnited States
German32.7%12.5%
Irish10.1%9.4%
English6.2%9.5%
Dutch6.2%—
American5.6%5.3%
Norwegian3.6%—
Swedish2.9%—
Danish1.0%—
Mexican10.0%11.3%
Guatemalan1.3%0.5%
Salvadoran0.5%0.7%
Honduran0.3%0.3%
Cuban0.3%0.7%
Puerto Rican0.2%1.8%
African American†1.3%9.9%
Ethiopian0.4%—
African0.2%0.5%
Laotian0.4%—
Burmese0.2%—
Filipino0.2%0.9%
Vietnamese0.2%0.6%
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
Sioux City
United States
Median age
38.5
39.1
Age 18–24
9.4%
9.2%
Age 65 and older
18.8%
17.2%
Household economy
Measure
Sioux City
United States
Median household income
$73,438
$84,427
Poverty rate
10.9%
12.5%
Bachelor's degree or higher (25+)
24.4%
35.6%
Languages at home
Measure
Sioux City
United States
Speaks a non-English language at home
13.1%
22.3%
Spanish
9.9%
13.6%
Other Asian & Pacific Island
1.0%
1.1%
Religious landscape
Measure
Sioux City
United States
Catholic
19.2%
18.6%
Evangelical Protestant
16.5%
16.5%
Unclaimed / not counted
42.0%
51.5%
Mainline Protestant
20.0%
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.
Sioux City, Iowa
presidential history
Presidential margin, 1892–2024
Democratic minus Republican, by election
Presidential margin over time
Year
Margin (D minus R)
1892
−14.4%
1896
−7.5%
1900
−18.3%
1904
−40.1%
1908
−14.2%
1912
+15.3%
1916
+1.6%
1920
−46.3%
1924
−32.2%
1928
−17.7%
1932
+32.9%
1936
+21.5%
1940
−8.6%
1944
−9.9%
1948
+2.6%
1952
−38.1%
1956
−23.5%
1960
−22.3%
1964
+10.4%
1968
−25.9%
1972
−28.4%
1976
−14.4%
1980
−30.8%
1984
−25.6%
1988
−10.1%
1992
−13.2%
1996
−11.1%
2000
−23.0%
2004
−24.8%
2008
−17.8%
2012
−24.1%
2016
−41.3%
2020
−39.8%
2024
−45.4%
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
26.5%Harris52,044
71.9%Trump141,399
1.6%
R+45.4
R+5.6
R+44.0
196,633
R
29.1%Biden59,142
69.0%Trump140,017
1.9%
R+39.8
D+1.4
R+44.3
203,037
R
26.1%Clinton50,266
67.4%Trump129,622
6.5%
R+41.3
R+17.2
R+43.4
192,327
R
37.0%Obama70,379
61.1%Romney116,144
1.8%
R+24.1
R+6.3
R+27.9
189,992
R
40.4%Obama76,085
58.2%McCain109,622
1.5%
R+17.8
D+7.0
R+25.1
188,463
R
37.1%Kerry70,875
62.0%Bush118,193
0.9%
R+24.8
R+1.8
R+22.3
190,783
R
36.7%Gore62,430
59.8%Bush101,592
3.5%
R+23.0
R+11.9
R+23.6
169,996
R
38.7%Clinton64,199
49.8%Dole82,702
11.5%
R+11.1
D+2.0
R+19.7
166,080
R
32.7%Clinton59,837
45.9%Bush83,917
21.4%
R+13.2
R+3.0
R+18.7
182,881
R
44.6%Dukakis75,320
54.7%Bush92,427
0.7%
R+10.1
D+15.4
R+2.4
168,927
R
36.8%Mondale66,271
62.4%Reagan112,322
0.8%
R+25.6
D+5.2
R+7.4
180,086
R
30.5%Carter56,444
61.4%Reagan113,387
8.1%
R+30.8
R+16.4
R+21.1
184,810
R
41.9%Carter75,440
56.3%Ford101,296
1.8%
R+14.4
D+14.1
R+16.4
180,001
R
35.2%McGovern61,980
63.6%Nixon112,019
1.2%
R+28.4
R+2.5
R+5.3
176,090
R
34.3%Humphrey59,672
60.3%Nixon104,737
5.4%
R+25.9
R+36.3
R+25.2
173,740
D
55.1%Johnson101,675
44.7%Goldwater82,490
0.1%
D+10.4
D+32.7
R+12.2
184,375
R
38.8%Kennedy78,191
61.1%Nixon123,086
0.0%
R+22.3
D+1.2
R+22.5
201,323
R
38.2%Stevenson74,786
61.7%Eisenhower120,889
0.1%
R+23.5
D+14.6
R+8.1
195,915
R
30.8%Stevenson62,215
68.9%Eisenhower139,261
0.3%
R+38.1
R+40.8
R+27.4
202,033
D
50.7%Truman84,912
48.1%Dewey80,527
1.2%
D+2.6
D+12.5
R+1.9
167,525
R
44.9%Roosevelt76,680
54.8%Dewey93,515
0.3%
R+9.9
R+1.2
R+17.4
170,641
R
45.6%Roosevelt93,625
54.2%Willkie111,359
0.2%
R+8.6
R+30.1
R+18.6
205,362
D
58.8%Roosevelt114,961
37.3%Landon73,007
3.9%
D+21.5
R+11.5
R+2.8
195,524
D
65.7%Roosevelt118,824
32.8%Hoover59,253
1.5%
D+32.9
D+50.6
D+15.2
180,840
R
40.9%Smith68,327
58.6%Hoover97,912
0.5%
R+17.7
D+14.5
R+0.2
167,070
R
16.8%Davis26,458
49.1%Coolidge77,040
34.1%
R+32.2
D+14.1
R+7.0
157,057
R
25.8%Cox35,486
72.1%Harding99,073
2.1%
R+46.3
R+47.9
R+20.1
137,395
D
49.9%Wilson41,649
48.3%Hughes40,335
1.9%
D+1.6
R+13.8
R+1.6
83,545
O
36.6%Wilson28,696
21.2%Taft16,666
42.2%
Roosevelt +5.6
D+29.5
R+4.2
78,471
R
41.6%Bryan32,279
55.8%Taft43,299
2.6%
R+14.2
D+25.9
R+4.7
77,583
R
27.0%Parker19,683
67.1%Roosevelt48,944
5.8%
R+40.1
R+21.8
R+20.5
72,890
R
39.7%Bryan31,704
58.0%McKinley46,353
2.3%
R+18.3
R+10.8
R+10.8
79,931
R
45.4%Bryan34,421
52.9%McKinley40,145
1.7%
R+7.5
D+6.9
R+1.5
75,854
R
33.7%Cleveland20,077
48.1%Harrison28,667
18.3%
R+14.4
—
R+16.1
59,658
voter registration
Registered voters
By party of registration, over time
Party registration · 2026R+40.9
vs
Presidential vote · 2024R+45.4
Registration leans Republican; the presidential vote runs 4.5 points more Democratic.
DemocraticRepublicanUnaffiliatedOther parties
† Some years predate full county coverage; a flagged year sums only the counties reporting it.
Voter registration in Sioux City
Year
Total registered
Democratic
Republican
Unaffiliated
Other
2008 (partial)
198,276
52,436
74,253
71,552
35
2010 (partial)
194,221
50,215
75,870
68,027
109
2012 (partial)
196,215
49,292
78,617
68,146
160
2014 (partial)
190,869
46,310
77,835
66,391
333
2016 (partial)
192,791
44,550
84,235
63,307
699
2018 (partial)
190,391
42,828
83,410
63,035
1,118
2020 (partial)
196,247
45,812
91,549
57,606
1,280
2022 (partial)
194,319
42,219
91,805
58,901
1,394
2024 (partial)
194,422
38,843
94,068
59,969
1,542
2026 (partial)
76,653
14,701
46,057
12,629
3,266
domestic migration
Who moves in and out
Net domestic migration over time
−1,763 net domestic migration · 2025
20112025
Net −29,720 over 2011–2025 · gain loss
Domestic migration in Sioux City in Sioux City: net domestic migration by year
Year
Net domestic migration
2011
−2,305
2012
−2,279
2013
−2,352
2014
−2,527
2015
−2,607
2016
−2,125
2017
−3,644
2018
−1,716
2019
−1,146
2021
−1,613
2022
−2,329
2023
−1,006
2024
−2,308
2025
−1,763
The Sioux City designated market area stretches across Iowa, Nebraska, South Dakota, and Minnesota, concentrating ad buys for campaigns targeting rural and small-city voters across a patchwork of closely contested congressional districts.
Across the recorded series it reached a Democratic high of 32.9 points in 1932 and a Republican high of 46.3 points in 1920. Between 2020 and 2024 the market moved 5.6 points toward the Republican candidate; the 2024 margin was 45.4 points.
A population of 418,200, a 77% non-Hispanic-white share, and a median household income of $73,438 describe the market. The market's voting pattern over the last decade is most similar to that of Lima and Minot-Bismarck-Dickinson (Williston).
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.
Sioux City, Iowa. Akashic. https://akashic.app/dma/624/. Accessed May 20, 2026. License: CC BY 4.0.
License: CC BY 4.0
Embed this page
A live widget for your site — no API key, attribution built in, CC BY 4.0. All widgets & sizes →
In 2024, Sioux City, Iowa voted Republican by 45.4 points (R+45.4), carried by the Republican candidate. Out of 196,633 votes cast, 52,044 went Democratic and 141,399 went Republican.
When did Sioux City, Iowa last vote Democratic?
The most recent presidential election in which Sioux City, Iowa voted Democratic was 1964.
How many people live in Sioux City, Iowa?
Sioux City, Iowa has a population of 418,200 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Sioux City, Iowa?
Median household income in Sioux City, Iowa is $73,438 — below the national median of $80,734. The Iowa state median is $75,059.
What is the political history of Sioux City, Iowa?
Akashic tracks 34 presidential elections in Sioux City, Iowa from 1892 to 2024. Of those, 5 went Democratic and 28 went Republican.
