- Lead
- 3,700
- Total
- 13,835
- vs nation
- R+25.3
Iowa 8th State House District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 2,906
- Total
- 14,876
- vs nation
- R+24.0
- Lead
- 2,501
- Total
- 14,743
- vs nation
- R+19.1
- Lead
- 1,746
- Total
- 15,700
- vs nation
- D+7.3
- Lead
- 2,086
- Total
- 15,816
- vs nation
- D+5.9
- Lead
- 1,398
- Total
- 15,928
- vs nation
- D+11.2
- Lead
- 1,021
- Total
- 14,552
- vs nation
- D+6.5
- Lead
- 2,429
- Total
- 14,052
- vs nation
- D+8.8
Key facts
- 2024 presidential margin
- R+26.7MIT Election Lab
- Population
- 31,8742024 5-year
- Population density
- 85 / sq mi2024 5-year · TIGER/Line
- Land area
- 376 sq miTIGER/Line
- Median household income
- $66,1872024 5-year
- White (non-Hispanic)
- 83.4%2024 5-year
- Black
- 5.6%2024 5-year
- Hispanic / Latino
- 6.0%2024 5-year
- Peak Democratic margin
- D+37.2 in 1964MIT Election Lab
- Peak Republican margin
- R+37.5 in 1920MIT Election Lab
- Most similar
- State House District 68, IA · twin score 95.8
presidential history
Party record book
Iowa 8th 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
68.4%
11,576 votes · D+37.2 · modeled estimate
Runner-up · Franklin D. Roosevelt, 1932 · 65.5%
Republican
Theodore Roosevelt1904
64.0%
3,548 votes · R+35.9 · modeled estimate
Runner-up · Donald Trump, 2024 · 62.6%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Lyndon B. Johnson1964
11,576votes
68.4% of the vote · D+37.2 · modeled estimate
Runner-up · Franklin D. Roosevelt, 1940 · 9,479 votes
Republican
Dwight D. Eisenhower1952
9,976votes
55.1% of the vote · R+12.1 · modeled estimate
Runner-up · Richard Nixon, 1972 · 9,012 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
+31.2pts D vs U.S.
Place D+23.5 · U.S. R+7.7 · modeled estimate
Runner-up · Walter Mondale, 1984 · +24.7 pts
Republican
Donald Trump2024
+25.3pts R vs U.S.
Place R+26.7 · U.S. R+1.5 · modeled estimate
Runner-up · Donald Trump, 2020 · +24.0 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.
With a 2024 presidential margin of R+26.7 and a population of roughly 32,000, this district reflects the broader realignment of Iowa's rural and small-town communities away from the competitive patterns it showed in earlier election cycles.
Across the recorded series it reached a Democratic high of 37.2 points in 1964 and a Republican high of 37.5 points in 1920. Between 2020 and 2024 the district moved 7.2 points toward the Republican candidate; the 2024 margin was 26.7 points.
A population of 31,874, a 83% non-Hispanic-white share, and a median household income of $66,187 describe the district. The district's voting pattern over the last decade is most similar to that of State House District 68 and State House District 58.
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 8th State House District. Akashic. https://akashic.app/sld-lower/19008/. Accessed May 20, 2026. License: CC BY 4.0.