House districts / Iowa


Iowa's 1st congressional district

IA-1. Same lines in 2026 as in 2022.

Mariannette Miller-Meeks
Current member
Mariannette Miller-Meeks
Republican. In office since 2021.
2026 lines

Fundraising

3 other 2026 candidates filed reports (primary candidates). 2 other candidates have not filed.

Federal Election Commission, candidate totals, public domain.

President in this district

PollCheck calculation from precinct returns on the 2026 lines (method).

YearDemocratRepublicanOtherMargin
2024Harris 45.0%Trump 53.5%1.5%R+8.5
2020Biden 47.5%Trump 50.4%2.1%R+2.9
2016Clinton 44.8%Trump 47.9%7.3%R+3.0

Who lives here

MeasureThis districtUS
People
Population
800,735
Adults (18+)
624,196
Citizens, % of adults
97.1%
92.1%
Age, % of adults
18 to 29
21.5%
20.3%
30 to 44
24.1%
25.9%
45 to 64
30.9%
31.8%
65 and over
23.4%
22.0%
Race and Hispanic origin, % of residents
White
83.3%
57.4%
Black
4.1%
11.9%
Hispanic
6.0%
19.3%
Asian
2.3%
5.9%
Other or more than one
4.3%
5.5%
Education and income
Bachelor's degree or higher, % of 25+
32.8%
35.7%
Median household income
$73,680
$80,734

American Community Survey 2020-2024 5-year estimates for this district. The tick marks the US figure.

Winning margin

Results since 1976

YearWinnerShare Runner-upShareMargin
Current lines (2022 on) post-census redistricting
2024Mariannette Miller-Meeks Republican50.0%Christina Bohannan Democrat others 0.2%49.8%R+0.2
2022Mariannette Miller-Meeks Republican53.4%Christina Bohannan Democrat others 0.1%46.6%R+6.8
Earlier lines, elections 2012-2020 seat count changed from 5 to 4 after the census
2020Ashley Hinson Republican51.2%Abby Finkenauer Democrat others 0.1%48.6%R+2.6
2018Abby Finkenauer Democrat51.0%Rod Blum Republican others 3.1%45.9%D+5.0
2016Rod Blum Republican53.7%Monica Vernon Democrat others 0.2%46.1%R+7.7
2014Rod Blum Republican51.1%Pat Murphy Democrat others 0.1%48.8%R+2.3
2012Bruce L. Braley Democrat56.9%Ben Lange Republican others 1.5%41.6%D+15.3
Earlier lines, elections 2002-2010 post-census redistricting
2010Bruce L. Braley Democrat49.5%Benjamin M. Lange Republican others 3.0%47.5%D+2.0
2008Bruce L. Braley Democrat64.6%David Hartsuch Republican35.4%D+29.2
2006Bruce Braley Democrat55.1%Mike Whalen Republican others 1.6%43.2%D+11.8
2004Jim Nussle Republican55.2%Bill Gluba Democrat others 1.6%43.3%R+11.9
2002Jim Nussle Republican57.1%Ann Hutchinson Democrat others 0.2%42.6%R+14.5
Earlier lines, elections 1992-2000 seat count changed from 6 to 5 after the census
2000James A. Leach Republican61.8%Bob Simpson Democrat others 2.1%36.1%R+25.7
1998James A. Leach Republican56.5%Bob Rush Democrat others 1.2%42.3%R+14.3
1996James A. Leach Republican52.8%Bob Rush Democrat others 1.5%45.6%R+7.2
1994James A. Leach Republican60.2%Glen Winekauf Democrat others 1.9%37.9%R+22.3
1992James A. Leach Republican68.1%Jan J. Zonneveld Democrat others 0.6%31.2%R+36.9
Earlier lines, elections 1982-1990 post-census redistricting
1990Jim Leach Republican99.8% others 0.2%R+99.7
1988Jim Leach Republican60.7%Bill Gluba Democrat others 0.9%38.4%R+22.3
1986Jim Leach Republican66.4%John R. Whitaker Democrat33.6%R+32.8
1984Jim Leach Republican66.8%Kevin Ready Democrat33.2%R+33.5
1982Jim Leach Republican59.2%William E. Gluba Democrat40.8%R+18.4
Earlier lines, elections 1976-1980
1980Jim Leach Republican64.1%Jim Larew Democrat others 1.0%34.9%R+29.2
1978Jim Leach Republican63.5%Richard E. Myers Democrat others 0.8%35.8%R+27.7
1976James A. S. Leach Republican51.9%Edward Mezvinsky Democrat others 0.2%47.8%R+4.1

More on Iowa

Other Iowa districts

About these results

Shares count all candidate votes, including write-ins, with a candidate's votes on several party lines added together. Each result is on the lines in force at the time. Mid-decade redraws before 2016 may be unmarked.

President in this district: 2016 and 2020 are estimates: precinct votes are split between districts by census block.

Counties only partly inside the district show the 2024 result for that part; estimates are labelled.

Margin chart: winner minus runner-up. Gaps are unopposed races; dashed lines are new district lines.

Sources

Results: MIT Election Data and Science Lab, U.S. House 1976-2016 (doi:10.7910/DVN/IG0UN2, CC0; via MEDSL/constituency-returns), and Clerk of the US House, Statistics of the Presidential and Congressional Election 2018-2024 (public domain).

Presidential results: PollCheck calculation from MIT Election Data and Science Lab 2024 precinct returns (doi:10.7910/DVN/XDJYKC, doi:10.7910/DVN/USBYR4, CC0; state totals doi:10.7910/DVN/42MVDX, CC0) and Voting and Election Science Team 2016 and 2020 precinct results and shapes (doi:10.7910/DVN/NH5S2I, doi:10.7910/DVN/K7760H, CC BY 4.0), with US Census Bureau 2020 block populations and block equivalency files (public domain). Official figures: Texas Legislative Council (2024 on the 2026 lines); Louisiana, New Jersey, California and Washington election offices (county totals). Certified results transcribed by Wikipedia (CC BY-SA 4.0): Maine 2024 by district: 2024 United States presidential election in Maine (revision 1382530995); Indiana county totals: 2024 United States presidential election in Indiana (revision 1382505975); Oregon county totals: 2024 United States presidential election in Oregon (revision 1382605746).

District lines: US Census Bureau TIGER/Line 2026 (120th Congress) and 2025 cartographic boundary files (119th Congress), public domain.

Members: unitedstates/congress-legislators (CC0).

Counties: US Census Bureau 2024 cartographic boundary file (public domain); 2024 county results summed from the same MEDSL precinct returns, with the official county totals above.

Demographics: US Census Bureau, American Community Survey 5-year estimates 2020-2024 (public domain).

2028 candidates: Federal Election Commission (public domain).

Photos: official portraits, public domain (US government); see Photo credits.

PollCheck US. Data through November 5, 2026. Photo credits