† Citizen voting-age population estimated for prior cycles; 2004 predates the ACS and is extrapolated. Source: ACS 5-year, table B05003.
——
D+60R+60
3 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 City, IA-NE-SDUnited States
German25.4%12.5%
Irish11.1%9.4%
American7.3%5.3%
English6.4%9.5%
Norwegian3.7%—
Dutch2.6%—
Swedish2.0%—
Italian1.2%4.8%
Mexican15.9%11.3%
Guatemalan2.4%0.5%
Salvadoran0.7%0.7%
Puerto Rican0.3%1.8%
Honduran0.3%0.3%
Nicaraguan0.2%—
African American†3.0%9.9%
Ethiopian1.1%—
Somali0.4%—
African0.3%0.5%
Vietnamese0.7%0.6%
Laotian0.5%—
Filipino0.4%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
Sioux City, IA-NE-SD
United States
Median age
36.2
39.1
Age 18–24
9.6%
9.2%
Age 65 and older
15.7%
17.2%
Household economy
Measure
Sioux City, IA-NE-SD
United States
Median household income
$75,053
$84,427
Poverty rate
12.7%
12.5%
Bachelor's degree or higher (25+)
24.4%
35.6%
Languages at home
Measure
Sioux City, IA-NE-SD
United States
Speaks a non-English language at home
19.9%
22.3%
Spanish
15.0%
13.6%
Other Asian & Pacific Island
1.1%
1.1%
Other languages
1.7%
0.8%
Religious landscape
Measure
Sioux City, IA-NE-SD
United States
Catholic
21.1%
18.6%
Evangelical Protestant
10.0%
16.5%
Unclaimed / not counted
54.2%
51.5%
Mainline Protestant
10.8%
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, IA-NE-SD
presidential history
Presidential margin, 1892–2024
Democratic minus Republican, by election
Presidential margin over time
Year
Margin (D minus R)
1892
−10.1%
1896
−5.2%
1900
−14.2%
1904
−41.2%
1908
−10.8%
1912
+19.4%
1916
+19.5%
1920
−28.3%
1924
−28.7%
1928
−8.8%
1932
+36.8%
1936
+29.9%
1940
+2.4%
1944
+3.7%
1948
+13.6%
1952
−18.4%
1956
−10.9%
1960
−10.0%
1964
+21.3%
1968
−7.8%
1972
−15.0%
1976
−6.2%
1980
−18.2%
1984
−9.8%
1988
+4.6%
1992
−1.4%
1996
+2.1%
2000
−5.0%
2004
−4.3%
2008
−2.7%
2012
−2.8%
2016
−22.1%
2020
−18.7%
2024
−26.3%
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
35.9%Harris20,802
62.2%Trump36,063
1.8%
R+26.3
R+7.6
R+24.9
57,935
R
39.6%Biden24,173
58.3%Trump35,606
2.1%
R+18.7
D+3.3
R+23.2
61,034
R
35.6%Clinton20,751
57.6%Trump33,633
6.8%
R+22.1
R+19.3
R+24.2
58,343
R
47.7%Obama28,006
50.4%Romney29,633
1.9%
R+2.8
R+0.1
R+6.6
58,751
R
47.9%Obama28,221
50.6%McCain29,821
1.5%
R+2.7
D+1.6
R+10.0
58,898
R
47.5%Kerry27,482
51.8%Bush29,964
0.7%
R+4.3
D+0.7
R+1.8
57,858
R
45.7%Gore22,744
50.8%Bush25,248
3.5%
R+5.0
R+7.2
R+5.6
49,729
D
45.7%Clinton22,234
43.6%Dole21,194
10.7%
D+2.1
D+3.6
R+6.4
48,656
R
40.3%Clinton21,943
41.8%Bush22,725
17.9%
R+1.4
R+6.0
R+7.0
54,425
D
52.0%Dukakis25,707
47.4%Bush23,441
0.7%
D+4.6
D+14.4
D+12.3
49,472
R
44.7%Mondale23,682
54.5%Reagan28,900
0.8%
R+9.8
D+8.4
D+8.4
53,029
R
36.6%Carter19,690
54.8%Reagan29,506
8.6%
R+18.2
R+12.1
R+8.5
53,817
R
46.1%Carter24,496
52.3%Ford27,781
1.6%
R+6.2
D+8.8
R+8.2
53,142
R
41.8%McGovern21,276
56.8%Nixon28,907
1.4%
R+15.0
R+7.2
D+8.2
50,899
R
43.3%Humphrey21,836
51.0%Nixon25,754
5.7%
R+7.8
R+29.0
R+7.1
50,464
D
60.6%Johnson32,323
39.3%Goldwater20,980
0.1%
D+21.3
D+31.3
R+1.3
53,333
R
45.0%Kennedy26,564
55.0%Nixon32,497
0.0%
R+10.0
D+0.8
R+10.2
59,067
R
44.5%Stevenson24,564
55.4%Eisenhower30,551
0.1%
R+10.9
D+7.6
D+4.5
55,164
R
40.6%Stevenson23,082
59.1%Eisenhower33,554
0.3%
R+18.4
R+32.0
R+7.7
56,795
D
56.4%Truman26,665
42.8%Dewey20,239
0.8%
D+13.6
D+9.9
D+9.1
47,300
D
51.7%Roosevelt24,494
48.0%Dewey22,748
0.2%
D+3.7
D+1.3
R+3.8
47,346
D
51.1%Roosevelt29,487
48.7%Willkie28,088
0.2%
D+2.4
R+27.4
R+7.5
57,664
D
62.4%Roosevelt33,108
32.5%Landon17,266
5.1%
D+29.9
R+6.9
D+5.6
53,069
D
67.5%Roosevelt32,971
30.7%Hoover15,008
1.7%
D+36.8
D+45.6
D+19.0
48,816
R
45.4%Smith20,691
54.2%Hoover24,711
0.4%
R+8.8
D+19.8
D+8.6
45,587
R
17.9%Davis7,517
46.6%Coolidge19,539
35.5%
R+28.7
R+0.4
R+3.5
41,952
R
34.2%Cox11,529
62.5%Harding21,070
3.4%
R+28.3
R+47.8
R+2.1
33,734
D
58.8%Wilson11,164
39.2%Hughes7,455
2.0%
D+19.5
D+0.1
D+16.4
18,997
O
36.2%Wilson6,141
16.8%Taft2,849
47.1%
Roosevelt +10.9
D+30.2
R+0.2
16,981
R
42.7%Bryan6,947
53.6%Taft8,708
3.7%
R+10.8
D+30.3
R+1.3
16,254
R
25.6%Parker3,938
66.8%Roosevelt10,265
7.6%
R+41.2
R+26.9
R+21.5
15,364
R
41.5%Bryan6,931
55.7%McKinley9,308
2.8%
R+14.2
R+9.0
R+6.7
16,700
R
46.5%Bryan7,301
51.7%McKinley8,120
1.8%
R+5.2
D+4.9
D+0.9
15,698
R
35.2%Cleveland4,567
45.3%Harrison5,874
19.5%
R+10.1
—
R+11.7
12,978
voter registration
Registered voters
By party of registration, over time
Party registration · 2026R+22.7
vs
Presidential vote · 2024R+26.3
Registration leans Republican; the presidential vote runs 3.7 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, IA-NE-SD
Year
Total registered
Democratic
Republican
Unaffiliated
Other
2008 (partial)
66,658
22,119
19,359
25,166
14
2010 (partial)
63,150
21,265
19,456
22,366
63
2012 (partial)
65,041
21,613
20,932
22,415
81
2014 (partial)
62,138
20,268
20,331
21,384
155
2016 (partial)
62,991
19,907
21,830
20,957
297
2018 (partial)
62,757
19,441
21,274
21,554
488
2020 (partial)
65,549
20,741
24,372
19,917
519
2022 (partial)
64,327
19,104
23,729
20,939
555
2024 (partial)
64,520
17,831
24,124
21,929
636
2026 (partial)
23,006
5,662
10,873
4,106
2,365
domestic migration
Who moves in and out
Net domestic migration over time
−1,037 net domestic migration · 2025
20112025
Net −13,017 over 2011–2025 · gain loss
Domestic migration in Sioux City, IA-NE-SD in Sioux City, IA-NE-SD: net domestic migration by year
Year
Net domestic migration
2011
−800
2012
−1,459
2013
−1,102
2014
−1,055
2015
−876
2016
−1,077
2017
−1,677
2018
−196
2019
+76
2021
−995
2022
−1,205
2023
−554
2024
−1,060
2025
−1,037
Sioux City anchors a rare three-state metropolitan area, drawing its electorate from counties in Iowa, Nebraska, and South Dakota whose agricultural economies and meatpacking workforce produce distinctive voting patterns compared with each state's urban cores.
Across the recorded series it reached a Democratic high of 36.8 points in 1932 and a Republican high of 41.2 points in 1904. Between 2020 and 2024 the metro moved 7.6 points toward the Republican candidate; the 2024 margin was 26.3 points.
A population of 144,682, a 66% non-Hispanic-white share, and a median household income of $75,053 describe the metro. The metro's voting pattern over the last decade is most similar to that of Austin, MN and Marshalltown, IA.
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 →
Cite this page
All citations released under CC BY 4.0. Attribution: Akashic Intelligence.
Sioux City, IA-NE-SD, Iowa. Akashic. https://akashic.app/cbsa/43580/. Accessed May 20, 2026. License: CC BY 4.0.
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In 2024, Sioux City, IA-NE-SD, Iowa voted Republican by 26.3 points (R+26.3), carried by the Republican candidate. Out of 57,935 votes cast, 20,802 went Democratic and 36,063 went Republican.
When did Sioux City, IA-NE-SD, Iowa last vote Democratic?
The most recent presidential election in which Sioux City, IA-NE-SD, Iowa voted Democratic was 1996.
How many people live in Sioux City, IA-NE-SD, Iowa?
Sioux City, IA-NE-SD, Iowa has a population of 144,682 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Sioux City, IA-NE-SD, Iowa?
Median household income in Sioux City, IA-NE-SD, Iowa is $75,053 — below the national median of $80,734. The Iowa state median is $75,059.
What is the political history of Sioux City, IA-NE-SD, Iowa?
Akashic tracks 34 presidential elections in Sioux City, IA-NE-SD, Iowa from 1892 to 2024. Of those, 9 went Democratic and 24 went Republican.
