† Citizen voting-age population estimated for prior cycles; 2004 predates the ACS and is extrapolated. Source: ACS 5-year, table B05003.
——
D+60R+60
4 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-Le Mars, IA-NE-SDUnited States
German27.5%12.5%
Irish11.3%9.4%
American7.2%5.3%
English6.4%9.5%
Norwegian3.5%—
Dutch2.9%—
Swedish1.9%—
Italian1.0%4.8%
Mexican14.2%11.3%
Guatemalan2.1%0.5%
Salvadoran0.6%0.7%
Honduran0.4%0.3%
Puerto Rican0.3%1.8%
Nicaraguan0.2%—
African American†2.6%9.9%
Ethiopian0.9%—
African0.4%0.5%
Somali0.3%—
Sudanese0.2%—
Vietnamese0.6%0.6%
Laotian0.4%—
Filipino0.3%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-Le Mars, IA-NE-SD
United States
Median age
37
39.1
Age 18–24
9.2%
9.2%
Age 65 and older
16.3%
17.2%
Household economy
Measure
Sioux City-Le Mars, IA-NE-SD
United States
Median household income
$76,291
$84,427
Poverty rate
11.8%
12.5%
Bachelor's degree or higher (25+)
24.0%
35.6%
Languages at home
Measure
Sioux City-Le Mars, IA-NE-SD
United States
Speaks a non-English language at home
18.0%
22.3%
Spanish
13.4%
13.6%
Other Asian & Pacific Island
1.0%
1.1%
Other languages
1.6%
0.8%
Religious landscape
Measure
Sioux City-Le Mars, IA-NE-SD
United States
Catholic
21.8%
18.6%
Evangelical Protestant
10.2%
16.5%
Unclaimed / not counted
51.9%
51.5%
Mainline Protestant
12.6%
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-Le Mars, IA-NE-SD
presidential history
Presidential margin, 1892–2024
Democratic minus Republican, by election
Presidential margin over time
Year
Margin (D minus R)
1892
−4.3%
1896
−5.0%
1900
−12.8%
1904
−37.7%
1908
−10.5%
1912
+20.5%
1916
+13.7%
1920
−33.1%
1924
−27.9%
1928
−6.9%
1932
+38.1%
1936
+27.4%
1940
−3.6%
1944
−2.4%
1948
+10.2%
1952
−23.4%
1956
−14.8%
1960
−11.0%
1964
+18.9%
1968
−11.4%
1972
−16.2%
1976
−7.3%
1980
−20.8%
1984
−13.1%
1988
+2.0%
1992
−4.3%
1996
−0.6%
2000
−8.7%
2004
−8.6%
2008
−6.6%
2012
−8.5%
2016
−27.5%
2020
−24.5%
2024
−31.7%
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
33.2%Harris23,906
65.0%Trump46,724
1.8%
R+31.7
R+7.2
R+30.3
71,906
R
36.8%Biden27,667
61.3%Trump46,098
1.9%
R+24.5
D+3.0
R+29.0
75,222
R
33.0%Clinton23,636
60.5%Trump43,313
6.5%
R+27.5
R+19.0
R+29.6
71,617
R
44.9%Obama32,170
53.3%Romney38,230
1.8%
R+8.5
R+1.8
R+12.3
71,701
R
46.0%Obama32,850
52.6%McCain37,586
1.4%
R+6.6
D+1.9
R+13.9
71,410
R
45.3%Kerry31,760
53.9%Bush37,774
0.8%
R+8.6
D+0.1
R+6.1
70,080
R
43.9%Gore26,243
52.5%Bush31,437
3.6%
R+8.7
R+8.1
R+9.2
59,847
R
44.3%Clinton25,979
44.9%Dole26,311
10.8%
R+0.6
D+3.8
R+9.1
58,612
R
38.7%Clinton25,114
43.0%Bush27,921
18.3%
R+4.3
R+6.3
R+9.9
64,909
D
50.7%Dukakis29,927
48.7%Bush28,757
0.7%
D+2.0
D+15.0
D+9.7
59,079
R
43.1%Mondale27,146
56.1%Reagan35,382
0.8%
R+13.1
D+7.8
D+5.2
63,056
R
35.3%Carter22,655
56.1%Reagan36,021
8.6%
R+20.8
R+13.6
R+11.1
64,163
R
45.6%Carter28,780
52.8%Ford33,371
1.6%
R+7.3
D+8.9
R+9.3
63,158
R
41.2%McGovern25,309
57.4%Nixon35,246
1.3%
R+16.2
R+4.8
D+7.0
61,365
R
41.4%Humphrey25,070
52.9%Nixon31,990
5.7%
R+11.4
R+30.4
R+10.7
60,501
D
59.4%Johnson38,014
40.5%Goldwater25,900
0.1%
D+18.9
D+29.9
R+3.6
63,946
R
44.5%Kennedy31,235
55.5%Nixon38,929
0.0%
R+11.0
D+3.8
R+11.1
70,170
R
42.6%Stevenson28,066
57.3%Eisenhower37,797
0.1%
R+14.8
D+8.6
D+0.6
65,912
R
38.2%Stevenson25,850
61.5%Eisenhower41,694
0.3%
R+23.4
R+33.5
R+12.6
67,752
D
54.7%Truman31,004
44.5%Dewey25,241
0.8%
D+10.2
D+12.6
D+5.7
56,716
R
48.7%Roosevelt27,464
51.1%Dewey28,833
0.2%
R+2.4
D+1.2
R+9.9
56,422
R
48.1%Roosevelt33,318
51.7%Willkie35,813
0.2%
R+3.6
R+31.0
R+13.5
69,243
D
60.6%Roosevelt39,102
33.2%Landon21,399
6.2%
D+27.4
R+10.7
D+3.2
64,514
D
68.3%Roosevelt40,536
30.1%Hoover17,896
1.6%
D+38.1
D+45.1
D+20.3
59,379
R
46.3%Smith25,706
53.3%Hoover29,559
0.4%
R+6.9
D+20.9
D+10.5
55,484
R
17.9%Davis9,122
45.8%Coolidge23,342
36.3%
R+27.9
D+5.3
R+2.7
50,988
R
31.9%Cox13,330
65.1%Harding27,160
3.0%
R+33.1
R+46.9
R+7.0
41,730
D
55.9%Wilson13,422
42.1%Hughes10,121
2.0%
D+13.7
R+6.8
D+10.6
24,014
O
37.3%Wilson8,179
16.8%Taft3,674
45.9%
Roosevelt +8.6
D+31.0
D+1.0
21,923
R
43.0%Bryan9,115
53.5%Taft11,330
3.5%
R+10.5
D+27.2
R+0.9
21,184
R
27.9%Parker5,601
65.6%Roosevelt13,170
6.6%
R+37.7
R+24.9
R+18.0
20,090
R
42.3%Bryan9,238
55.1%McKinley12,020
2.5%
R+12.8
R+7.7
R+5.2
21,814
R
46.6%Bryan9,693
51.6%McKinley10,743
1.8%
R+5.0
R+0.8
D+1.0
20,801
R
39.7%Cleveland6,811
44.0%Harrison7,546
16.3%
R+4.3
—
R+5.9
17,147
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 Democratic.
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.
