Iowa 1st Congressional District: Heartland Swing district. In 2024, voted R+8%. Democratic peak: D+16 in 2008.
Key facts
- 2024 presidential margin
- R+8MIT Election Lab
- Political typology
- Heartland SwingAkashic typology
- Population
- 800,6862024 5-year
- Median household income
- $74,3492024 5-year
- White (non-Hispanic)
- 85.0%2024 5-year
- Black
- 4.1%2024 5-year
- Hispanic / Latino
- 6.0%2024 5-year
- Peak Democratic margin
- D+16 in 2008MIT Election Lab
- Peak Republican margin
- R+8 in 2024MIT Election Lab
DW-NOMINATE
Member ideology
R
MILLER-MEEKS, Mariannette
MILLER-MEEKS scores 0.34 on the first NOMINATE dimension (−1 most liberal, +1 most conservative).
Predecessors: HINSON, Ashley (2021–2023), FINKENAUER, Abby (2019–2021), BLUM, Rod (2017–2019), BLUM, Rod (2015–2017)
Source · Voteview / Lewis, Poole, Rosenthal et al. (CC-BY).
2024 presidential election
Congressional District 1
TrumpR+8
How it voted
Share of the 2024 vote
| Donald Trump ✓Republican | 53.3% | 226,309 |
|---|---|---|
| Kamala HarrisDemocratic | 44.9% | 190,502 |
| OtherAll other candidates | 1.9% | 7,877 |
D+60R+60
20 counties, each filled by 2024 D-vs-R margin. Hover any county for its result.
Districts are drawn from fractional county slices; this map shows the whole counties that overlap the district. District boundaries: TIGER 2024.
presidential history
Presidential margin, 2008–2024
Democratic minus Republican, by election
| Year | Margin (D minus R) |
|---|---|
| 2008 | +15.7% |
| 2012 | +13.3% |
| 2016 | −3.0% |
| 2020 | −2.9% |
| 2024 | −8.4% |
DemocraticRepublican
5 presidential elections
| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| R | 190,502 | 226,309 | 424,688 | ||
| R | 203,400 | 215,742 | 428,058 | ||
| R | 177,850 | 189,883 | 396,628 | ||
| D | 226,087 | 173,043 | 399,130 | ||
| D | 224,737 | 162,527 | 395,900 |
Congressional elections · 16 Senate races
U.S. Senate
| Year | Won | D % | R % | Total |
|---|---|---|---|---|
| 2022 | R | 43.3% | 55.4% | 1,230,416 |
| 2020 | R | 44.4% | 50.9% | 1,700,130 |
| 2016 | R | 35.7% | 60.1% | 1,541,036 |
| 2014 | R | 43.8% | 52.1% | 1,129,700 |
| 2010 | R | 33.3% | 64.4% | 1,116,063 |
| 2008 | D | 62.7% | 37.3% | 1,502,918 |
| 2004 | R | 27.9% | 70.2% | 1,479,228 |
| 2002 | D | 54.2% | 43.8% | 1,023,075 |
| 1998 | R | 30.5% | 68.4% | 947,907 |
| 1996 | D | 51.8% | 46.7% | 1,224,054 |
| 1992 | R | 27.2% | 69.6% | 1,292,494 |
| 1990 | D | 54.5% | 45.4% | 983,933 |
| 1986 | R | 33.6% | 66.0% | 891,762 |
| 1984 | D | 55.5% | 43.7% | 1,292,700 |
| 1980 | R | 45.5% | 53.5% | 1,276,986 |
| 1978 | R | 47.9% | 51.1% | 824,576 |
Demographics
2024 ACS
Race, ethnicity, and ancestry
Click any group to see the ancestries typically reported within it.
German
29.7%
Irish
14.0%
English
11.0%
American
4.6%
Italian
2.0%
Scottish
1.7%
Polish
1.2%
Source · American Community Survey 5-year estimates, 2024 release. Hispanic/Latino is an ethnicity that overlaps the race categories, so these shares can total more than 100%. Ancestry is a self-reported, multiple-response item; ancestry percentages do not sum to the parent race percentage.
2024 ACS
Age distribution by sex
Median age: 39.0 in this county, 39.1 nationally
Male
Age
Female
85+
75–84
65–74
55–64
45–54
35–44
25–34
18–24
5–17
<5
Source · American Community Survey 5-year estimates, 2024 release.
2024 ACS
Median household income
Inflation-adjusted dollars
$74,349
Congressional District 1 ranks near the middle of US counties.
Congressional District 1$74,349
Iowa$75,059
United States$80,734
Source · American Community Survey 5-year estimates, 2024 release.
2024 ACS
Poverty rate
All persons below federal poverty line
12.1%
Child poverty is below the national average.
Children under 1812.6%
Working age (18–64)12.1%
Seniors (65+)8.9%
Source · American Community Survey 5-year estimates, 2024 release.
2024 ACS
Language at home
Population aged 5 and older
92.5%
speak English only
Spanish3.2%
Other Indo-European1.8%
Asian & Pacific Islander1.6%
Other languages1.0%
Source · ACS 5-year estimates, 2024.
2020 religion census
Religious adherents
Adherents per capita by tradition
Source · 2020 US Religion Census. Remaining 62.1% of residents not counted as adherents by any reporting body.
Iowa's 1st district stretches from the Cedar Rapids metro into rural eastern counties, a mix that once made it a genuine swing seat but has shifted steadily toward Republican margins over the past three election cycles.
Across the recorded series it reached a Democratic high of sixteen points in 2008 and a Republican high of eight points in 2024. Between 2020 and 2024 the district moved six points toward the Republican candidate; the 2024 margin was eight points.
A population of 800,686, a 85% non-Hispanic-white share, and a median household income of $74,349 describe the district.
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.
Congressional District 1, Iowa. Akashic. https://akashic.app/cd/1901/. Accessed May 20, 2026. License: CC BY 4.0.
License: CC BY 4.0
Frequently asked questions
How did Congressional District 1, Iowa vote in 2024?
In 2024, Congressional District 1, Iowa voted Republican by 8.4 points (R+8), carried by the Republican candidate. Out of 424,688 votes cast, 190,502 went Democratic and 226,309 went Republican.
What is Congressional District 1, Iowa's political typology?
Akashic places Congressional District 1, Iowa in the "Heartland Swing" typology. The typology is a data-driven cluster built from vote share, vote swing, race and ethnicity, income, language spoken at home, religion, and ancestry. Across 5 elections in the dataset, the district has voted Democratic 2 times, Republican 3 times, and other 0 times.
When did Congressional District 1, Iowa last vote Democratic?
The most recent presidential election in which Congressional District 1, Iowa voted Democratic was 2012.
How many people live in Congressional District 1, Iowa?
Congressional District 1, Iowa has a population of 800,686 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Congressional District 1, Iowa?
Median household income in Congressional District 1, Iowa is $74,349 — below the national median of $80,734. The Iowa state median is $75,059.
What is the political history of Congressional District 1, Iowa?
Akashic tracks 5 presidential elections in Congressional District 1, Iowa from 2008 to 2024. Of those, 2 went Democratic and 3 went Republican. The district's typology — "Heartland Swing" — captures where that record, its demographics, and its recent swing place it among American communities.