Sioux City, IA-NE-SD · 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
Franklin D. Roosevelt1932
67.5%
32,971 votes · D+36.8
Runner-up · Franklin D. Roosevelt, 1936 · 62.4%
Republican
Theodore Roosevelt1904
66.8%
10,265 votes · R+41.2
Runner-up · Warren G. Harding, 1920 · 62.5%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Franklin D. Roosevelt1936
33,108votes
62.4% of the vote · D+29.9
Runner-up · Franklin D. Roosevelt, 1932 · 32,971 votes
Republican
Donald Trump2024
36,063votes
62.2% of the vote · R+26.3
Runner-up · Donald Trump, 2020 · 35,606 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
Franklin D. Roosevelt1932
+19.0pts D vs U.S.
Place D+36.8 · U.S. D+17.8
Runner-up · Woodrow Wilson, 1916 · +16.4 pts
Republican
Donald Trump2024
+24.9pts R vs U.S.
Place R+26.3 · U.S. R+1.5
Runner-up · Donald Trump, 2016 · +24.2 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.
Sioux City, IA-NE-SD · 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 Sioux City, IA-NE-SD, by party and cycle.
Party
2008
2012
2016
2020
2024
Democratic
Clinton33,037 votes · 3 of 3 countiescaucus + primary
Sanders2Clinton14,461 votes · 3 of 3 countiescaucus + primary
Biden2Sanders14,892 votes · 3 of 3 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 · 2026R+22.7
vs
Presidential vote · 2024R+26.3
Registration leans Republican; the presidential vote runs 3.7 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 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.
