- Lead
- 4,119
- Total
- 16,710
- vs nation
- R+23.2
Iowa 38th State House District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 3,106
- Total
- 16,715
- vs nation
- R+23.0
- Lead
- 2,413
- Total
- 16,020
- vs nation
- R+17.2
- Lead
- 1,713
- Total
- 16,483
- vs nation
- D+6.5
- Lead
- 1,777
- Total
- 16,402
- vs nation
- D+3.6
- Lead
- 1,370
- Total
- 16,930
- vs nation
- D+10.5
- Lead
- 487
- Total
- 15,013
- vs nation
- D+2.7
- Lead
- 2,423
- Total
- 13,968
- vs nation
- D+8.8
Key facts
- 2024 presidential margin
- R+24.6MIT Election Lab
- Population
- 31,8982024 5-year
- Population density
- 58 / sq mi2024 5-year · TIGER/Line
- Land area
- 546 sq miTIGER/Line
- Median household income
- $68,4862024 5-year
- White (non-Hispanic)
- 90.5%2024 5-year
- Black
- 2.1%2024 5-year
- Hispanic / Latino
- 3.0%2024 5-year
- Peak Democratic margin
- D+34.4 in 1964MIT Election Lab
- Peak Republican margin
- R+45.0 in 1924MIT Election Lab
- Most similar
- State House District 87, IA · twin score 96.8
presidential history
Party record book
Iowa 38th State House District · the strongest Democratic and Republican presidential performances recorded here, measured three ways.
1892–2024 (partial returns from 1876) · 38 presidential cycles · 38 with a vote-share denominator · 34 with a national benchmark
Highest vote share
Largest share of the presidential candidate vote cast here.
Democratic
Lyndon B. Johnson1964
67.1%
8,885 votes · D+34.4 · modeled estimate
Runner-up · Franklin D. Roosevelt, 1936 · 59.1%
Republican
Herbert Hoover1928
68.7%
7,422 votes · R+37.5 · modeled estimate
Runner-up · Warren G. Harding, 1920 · 65.5%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
John Kerry2004
9,070votes
53.6% of the vote · D+8.1 · modeled estimate
Runner-up · Barack Obama, 2012 · 8,925 votes
Republican
Donald Trump2024
10,265votes
61.4% of the vote · R+24.6 · modeled estimate
Runner-up · Donald Trump, 2020 · 9,765 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
Michael Dukakis1988
+25.0pts D vs U.S.
Place D+17.3 · U.S. R+7.7 · modeled estimate
Runner-up · Walter Mondale, 1984 · +18.4 pts
Republican
Donald Trump2024
+23.2pts R vs U.S.
Place R+24.6 · U.S. R+1.5 · modeled estimate
Runner-up · Donald Trump, 2020 · +23.0 pts
Current officeholders
State legislative officeholder from OpenStates nightly current-legislator data.
Senate and governor results are in the Office selector at the top of this page.
U.S. House
Each row is a county-allocated estimate of U.S. House votes for this district — county returns apportioned onto its boundary, not precinct-counted. “Vote lead” is the estimated local lead here, not necessarily the winner of the full contest.
In 2024 it voted Republican by R+24.6, against D+10.8 in 2008, having changed party at least once across the five cycles. About 28,400 residents lived here, with White alone at 91.7% in the 2024 ACS 5-year.
Across the recorded series it reached a Democratic high of 34.4 points in 1964 and a Republican high of 45.0 points in 1924. Between 2020 and 2024 the district moved 6.1 points toward the Republican candidate; the 2024 margin was 24.6 points.
A population of 31,898, a 91% non-Hispanic-white share, and a median household income of $68,486 describe the district. The district's voting pattern over the last decade is most similar to that of State House District 87 and State House District 53.
The state-house 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.
District research tools
Open the source-auditable district brief for electoral baseline, electorate, current-cycle coverage, geography, official dates, and methodology. Open campaign intelligence report → · Browse all comparisons →
Iowa 38th State House District. Akashic. https://akashic.app/sld-lower/19038/. Accessed May 20, 2026. License: CC BY 4.0.