congressional districtIowa 4th Congressional District
presidential margin
2004–2024 · Democratic minus Republican
2004R+13.3
2008R+3.5
2012R+9.1
2016R+27.0
2020R+26.0
2024R+31.4
net swing · 2004→2024R+18.1R+13.3 → R+31.4
vs. U.S. · 2024R+29.9R+31.4 vs R+1.5
presidential returns
2024 turnout 67.0% of 587,187 citizens 18+
Year
Democrat
Republican
Others
Total
CVAP
Turnout
2024
131,712
255,113
6,669
393,494
587,187
67.0%
2020
146,819
252,564
7,796
407,179
579,882†
70.2%
2016
129,659
235,026
25,793
390,478
581,702†
67.1%
2012
173,836
209,284
7,167
390,287
580,939†
67.2%
2008
184,067
197,784
10,387
392,238
574,833†
68.2%
2004
167,185
219,004
3,422
389,611
568,726†
68.5%
† Citizen voting-age population estimated for prior cycles from the constituent-county ACS trend anchored to the current figure. Source: ACS 5-year, table B05003.
——
D+60R+60
20042024
District by 2024 margin · Precinct returns · VEST · 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
GroupIA-4IowaUnited States
German32.8%30.5%12.5%
Irish10.9%12.8%9.4%
English8.7%10.2%9.5%
American5.5%4.6%5.3%
Norwegian5.4%4.1%—
Dutch4.6%2.7%—
Swedish2.5%1.9%—
Danish1.5%——
Mexican6.7%5.0%11.3%
Guatemalan0.8%0.4%0.5%
Salvadoran0.4%0.3%0.7%
Puerto Rican0.3%0.3%1.8%
Cuban0.3%—0.7%
Honduran0.2%0.2%0.3%
African American†1.3%2.6%9.9%
African0.2%0.3%0.5%
Chinese0.3%0.3%1.3%
Burmese0.2%0.3%—
Vietnamese0.2%0.3%0.6%
Asian Indian0.2%0.5%1.4%
Korean0.2%0.2%0.4%
Laotian0.2%0.2%—
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
IA-4
Iowa
United States
Median age
38.6
38.8
39.1
Age 18–24
11.3%
10.0%
9.2%
Age 65 and older
19.0%
18.1%
17.2%
Household economy
Measure
IA-4
Iowa
United States
Median household income
$72,711
$75,059
$84,427
Poverty rate
11.6%
11.1%
12.5%
Bachelor's degree or higher (25+)
27.6%
31.8%
35.6%
Languages at home
Measure
IA-4
Iowa
United States
Speaks a non-English language at home
10.4%
9.2%
22.3%
Spanish
7.2%
4.7%
13.6%
Religious landscape
Measure
IA-4
Iowa
United States
Catholic
—
14.7%
18.6%
Evangelical Protestant
—
10.9%
16.5%
Unclaimed / not counted
—
55.2%
51.5%
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.
Iowa 4th Congressional District
presidential history
Presidential margin, 2004–2024
Democratic minus Republican, by election
Presidential margin over time
Year
Margin (D minus R)
2004
−13.3%
2008
−3.5%
2012
−9.1%
2016
−27.0%
2020
−26.0%
2024
−31.4%
DemocraticRepublican
6 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. Third-party votes in 2012 are allocated from certified county totals by this place's share of each county's two-party vote — that cycle's precinct source records two-party splits. † 2004 sub-county results are estimated: the source's block-level detail for this cycle was unreliable — either county/municipality-level consolidated reporting (COVID-era) or a precinct-to-block allocation that misplaced votes — so the figures are allocated from the constituent county totals in proportion to the place and scaled to certified totals.
Federal officeholders only. State and local officeholders are planned for the next data pass.
Congressional elections · 25 House races
U.S. House
Each result reflects the U.S. House district as it was drawn for that election; redistricting has redrawn these lines over time, so they can differ from the current 120th-Congress district shown on the map above.
Source · MIT Election Lab (MEDSL), House. CC-BY 4.0.
Year
District
Won
Democratic
Republican
Total
2024
4
R
32.7%122,175
67.0%250,522
373,824
2022
4
R
30.4%84,230
67.3%186,467
277,008
2020
4
R
37.8%144,761
62.0%237,369
383,022
2018
4
R
47.0%147,246
50.3%157,676
313,251
2016
4
R
38.6%142,993
61.2%226,719
370,259
2014
4
R
38.3%105,504
61.6%169,834
275,633
2012
4
R
44.8%169,470
52.9%200,063
377,883
2010
4
R
32.0%74,300
65.6%152,588
232,519
2008
4
R
39.4%120,746
60.6%185,458
306,204
2006
4
R
42.8%90,982
57.2%121,650
212,632
2004
4
R
39.0%116,121
60.9%181,294
297,566
2002
4
R
43.1%90,784
54.8%115,430
210,774
2000
4
R
36.7%101,112
61.4%169,267
275,645
1998
4
R
33.9%67,550
65.2%129,942
199,277
1996
4
R
46.7%119,790
52.0%133,419
256,509
1994
4
R
46.4%98,824
52.5%111,935
213,206
1992
4
D
61.6%158,610
36.5%94,045
257,441
1990
4
D
97.9%127,812
0.0%0
130,590
1988
4
D
71.6%157,065
28.3%62,056
219,223
1986
4
D
68.3%107,271
31.6%49,641
156,952
1984
4
D
60.7%136,922
39.3%88,717
225,639
1982
4
D
66.0%118,849
33.6%60,534
179,972
1980
4
D
53.9%117,896
45.9%100,335
218,620
1978
4
D
64.7%88,526
35.3%48,308
136,834
1976
4
D
69.1%145,343
30.9%65,013
210,356
Spanning rural farmland across Iowa's northwestern corner, this district delivered a 32-point presidential margin in 2024, reflecting an agricultural electorate that has shifted steadily and sharply toward one party over the past two decades.
Across the recorded series it reached a Republican high of 31.4 points in 2024. Between 2020 and 2024 the district moved 5.4 points toward the Republican candidate; the 2024 margin was 31.4 points.
A population of 797,576, a 83% non-Hispanic-white share, and a median household income of $72,711 describe the district. The district's voting pattern over the last decade is most similar to that of Congressional District (at Large) and Congressional District 8.
Akashic
Political twins — districts
The congressional districts 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 →
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Iowa 4th Congressional District. Akashic. https://akashic.app/cd/1904/. Accessed May 20, 2026. License: CC BY 4.0.
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How did Iowa 4th Congressional District vote in 2024?
In 2024, Iowa 4th Congressional District voted Republican by 31.4 points (R+31.4), carried by the Republican candidate. Out of 393,494 votes cast, 131,712 went Democratic and 255,113 went Republican.
How many people live in Iowa 4th Congressional District?
Iowa 4th Congressional District has a population of 797,576 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Iowa 4th Congressional District?
Median household income in Iowa 4th Congressional District is $72,711 — below the national median of $80,734. The Iowa state median is $75,059.
What is the political history of Iowa 4th Congressional District?
Akashic tracks 6 presidential elections in Iowa 4th Congressional District from 2004 to 2024. Of those, 0 went Democratic and 6 went Republican.
