HarrisDemocratic26.5%52,044TrumpRepublican71.9%141,399OtherAll other candidates1.6%3,190
R+45.4- Lead
- 89,355
- Total
- 196,633
- vs nation
- R+44.0
Akashicmedia market
Sioux City
Office (updates table and map)
President margin by year
Place winner margin
23 counties by 2024 margin · County returns · MIT Election Lab
President results by year
Vote totals, margins, and source status
BidenDemocratic29.1%59,142TrumpRepublican69.0%140,017OtherAll other candidates1.9%3,878
R+39.8- Lead
- 80,875
- Total
- 203,037
- vs nation
- R+44.3
ClintonDemocratic26.1%50,266TrumpRepublican67.4%129,622OtherAll other candidates6.5%12,439
R+41.3- Lead
- 79,356
- Total
- 192,327
- vs nation
- R+43.4
ObamaDemocratic37.0%70,379RomneyRepublican61.1%116,144OtherAll other candidates1.8%3,469
R+24.1- Lead
- 45,765
- Total
- 189,992
- vs nation
- R+27.9
ObamaDemocratic40.4%76,085McCainRepublican58.2%109,622OtherAll other candidates1.5%2,756
R+17.8- Lead
- 33,537
- Total
- 188,463
- vs nation
- R+25.1
KerryDemocratic37.1%70,875BushRepublican62.0%118,193OtherAll other candidates0.9%1,715
R+24.8- Lead
- 47,318
- Total
- 190,783
- vs nation
- R+22.3
GoreDemocratic36.7%62,430BushRepublican59.8%101,592OtherAll other candidates3.5%5,974
R+23.0- Lead
- 39,162
- Total
- 169,996
- vs nation
- R+23.6
ClintonDemocratic38.7%64,199DoleRepublican49.8%82,702OtherAll other candidates11.5%19,179
R+11.1- Lead
- 18,503
- Total
- 166,080
- vs nation
- R+19.7
Key facts
- 2024 presidential margin
- R+45.4MIT Election Lab
- Population
- 418,2002024 5-year
- Population density
- 31 / sq mi2024 5-year · TIGER/Line
- Land area
- 13,296 sq miTIGER/Line
- Median household income
- $73,4382024 5-year
- White (non-Hispanic)
- 77.0%2024 5-year
- Black
- 2.4%2024 5-year
- Hispanic / Latino
- 13.7%2024 5-year
- Peak Democratic margin
- D+32.9 in 1932MIT Election Lab
- Peak Republican margin
- R+46.3 in 1920MIT Election Lab
- Most similar
- Lima, OH · twin score 90.0
presidential history
Party record book
Sioux City · 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
65.7%
118,824 votes · D+32.9
Runner-up · Franklin D. Roosevelt, 1936 · 58.8%
Republican
Warren G. Harding1920
72.1%
99,073 votes · R+46.3
Runner-up · Donald Trump, 2024 · 71.9%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Franklin D. Roosevelt1932
118,824votes
65.7% of the vote · D+32.9
Runner-up · Franklin D. Roosevelt, 1936 · 114,961 votes
Republican
Donald Trump2024
141,399votes
71.9% of the vote · R+45.4
Runner-up · Donald Trump, 2020 · 140,017 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
+15.2pts D vs U.S.
Place D+32.9 · U.S. D+17.8
Runner-up · Al Smith, 1928 · −0.2 pts
Republican
Donald Trump2020
+44.3pts R vs U.S.
Place R+39.8 · U.S. D+4.5
Runner-up · Donald Trump, 2024 · +44.0 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.
voter registration
Registered voters
By party of registration, over time
Party registration · 2026R+40.9
Presidential vote · 2024R+45.4
Registration leans Republican; the presidential vote runs 4.5 points more Republican than the rolls.
DemocraticRepublicanUnaffiliatedOther parties
† Some years predate full county coverage; a flagged year sums only the counties reporting it.
| 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
| 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).
Political twins — media markets
The media markets whose fingerprint — 2000–2024 trajectory, demographics, ancestry, religion — sits closest to this one, and why.
Lima
Ohio
90.0twin score
2016–2024 trajectory12-yr trend≠ Norwegian ancestry
Minot-Bismarck-Dickinson (Williston)
North Dakota
88.1twin score
2016–2024 trajectory12-yr trend≠ Norwegian ancestry
Quincy-Hannibal-Keokuk
Missouri
77.3twin score
2016–2024 trajectory12-yr trend≠ median age
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.
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Places within Sioux City
counties23
Buena Vista CountyCedar CountyCherokee CountyClay CountyDakota CountyDickinson CountyDixon CountyEmmet CountyIda CountyKnox CountyMadison CountyMonona CountyO'Brien CountyPalo Alto CountyPierce CountyPlymouth CountySac CountySioux CountyStanton CountyThurston CountyUnion CountyWayne CountyWoodbury County
Frequently asked questions
How did Sioux City, Iowa vote in 2024?
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.