Sioux City-Le Mars, 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
68.3%
40,536 votes · D+38.1
Runner-up · Franklin D. Roosevelt, 1936 · 60.6%
Republican
Theodore Roosevelt1904
65.6%
13,170 votes · R+37.7
Runner-up · Warren G. Harding, 1920 · 65.1%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Franklin D. Roosevelt1932
40,536votes
68.3% of the vote · D+38.1
Runner-up · Franklin D. Roosevelt, 1936 · 39,102 votes
Republican
Donald Trump2024
46,724votes
65.0% of the vote · R+31.7
Runner-up · Donald Trump, 2020 · 46,098 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
+20.3pts D vs U.S.
Place D+38.1 · U.S. D+17.8
Runner-up · Woodrow Wilson, 1916 · +10.6 pts
Republican
Donald Trump2024
+30.3pts R vs U.S.
Place R+31.7 · U.S. R+1.5
Runner-up · Donald Trump, 2016 · +29.6 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-Le Mars, 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-Le Mars, IA-NE-SD, by party and cycle.
Party
2008
2012
2016
2020
2024
Democratic
Clinton3Obama13,102 votes · 4 of 4 countiescaucus + primary
Clinton2Sanders25,161 votes · 4 of 4 countiescaucus + primary
Biden3Sanders15,488 votes · 4 of 4 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+31.7
Registration leans Republican; the presidential vote runs 9.1 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-Le Mars, IA-NE-SD
Year
Total registered
Democratic
Republican
Unaffiliated
Other
2008 (partial)
84,186
25,823
26,760
31,584
19
2010 (partial)
80,957
24,968
27,205
28,710
74
2012 (partial)
83,146
25,192
29,200
28,657
97
2014 (partial)
79,895
23,689
28,508
27,513
185
2016 (partial)
81,140
23,285
30,596
26,889
370
2018 (partial)
80,506
22,626
29,983
27,309
588
2020 (partial)
83,792
24,092
33,798
25,270
632
2022 (partial)
82,597
22,234
33,223
26,454
686
2024 (partial)
82,957
20,727
33,858
27,614
758
2026 (partial)
23,006
5,662
10,873
4,106
2,365
domestic migration
Who moves in and out
Net domestic migration over time
−1,030 net domestic migration · 2025
20112025
Net −13,667 over 2011–2025 · gain loss
Domestic migration in Sioux City-Le Mars, IA-NE-SD in Sioux City-Le Mars, IA-NE-SD: net domestic migration by year
Year
Net domestic migration
2011
−1,021
2012
−1,475
2013
−1,065
2014
−1,164
2015
−951
2016
−888
2017
−1,853
2018
−275
2019
+171
2021
−999
2022
−1,316
2023
−648
2024
−1,153
2025
−1,030
Sioux City-Le Mars, IA-NE-SD sits in the Corn Belt. In 2024 it voted Republican.
Across the recorded series it reached a Democratic high of 38.1 points in 1932 and a Republican high of 37.7 points in 1904. Between 2020 and 2024 the region moved 7.2 points toward the Republican candidate; the 2024 margin was 31.7 points.
A population of 170,429, a 69% non-Hispanic-white share, and a median household income of $76,291 describe the region. The region's voting pattern over the last decade is most similar to that of Spencer-Spirit Lake, IA and Dixon-Sterling, IL.
Akashic
Political twins — combined metros
The combined 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-Le Mars, IA-NE-SD, Iowa. Akashic. https://akashic.app/csa/512/. Accessed May 20, 2026. License: CC BY 4.0.
How did Sioux City-Le Mars, IA-NE-SD, Iowa vote in 2024?
In 2024, Sioux City-Le Mars, IA-NE-SD, Iowa voted Republican by 31.7 points (R+31.7), carried by the Republican candidate. Out of 71,906 votes cast, 23,906 went Democratic and 46,724 went Republican.
When did Sioux City-Le Mars, IA-NE-SD, Iowa last vote Democratic?
The most recent presidential election in which Sioux City-Le Mars, IA-NE-SD, Iowa voted Democratic was 1988.
How many people live in Sioux City-Le Mars, IA-NE-SD, Iowa?
Sioux City-Le Mars, IA-NE-SD, Iowa has a population of 170,429 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Sioux City-Le Mars, IA-NE-SD, Iowa?
Median household income in Sioux City-Le Mars, IA-NE-SD, Iowa is $76,291 — below the national median of $80,734. The Iowa state median is $75,059.
What is the political history of Sioux City-Le Mars, IA-NE-SD, Iowa?
Akashic tracks 34 presidential elections in Sioux City-Le Mars, IA-NE-SD, Iowa from 1892 to 2024. Of those, 6 went Democratic and 27 went Republican.
