HarrisDemocratic29.1%4,818TrumpRepublican69.3%11,496OtherAll other candidates1.6%271
R+40.3- Lead
- 6,678
- Total
- 16,585
- vs nation
- R+38.8
modeled Census-place estimatemodeled estimate
Akashicstate house district
Iowa 18th State House District
Office (updates table and map)
President margin by year
Place winner margin
Boundary by 2024 margin · Precinct returns · VEST · MIT Election Lab
The precinct map shows the 2024 presidential vote; the timeline scrubs the district’s overall result across 1892–2024, on its current boundaries.
President results by year
Modeled candidate-vote estimate on current district boundaries
BidenDemocratic29.6%5,024TrumpRepublican68.9%11,701OtherAll other candidates1.6%265
R+39.3- Lead
- 6,677
- Total
- 16,990
- vs nation
- R+43.8
modeled Census-place estimatemodeled estimate
ClintonDemocratic26.3%4,320TrumpRepublican67.1%11,026OtherAll other candidates6.6%1,078
R+40.8- Lead
- 6,706
- Total
- 16,424
- vs nation
- R+42.9
modeled Census-place estimatemodeled estimate
ObamaDemocratic38.8%6,386RomneyRepublican59.2%9,756OtherAll other candidates2.0%326
R+20.5- Lead
- 3,370
- Total
- 16,468
- vs nation
- R+24.3
modeled Census-place estimatemodeled estimate
ObamaDemocratic42.8%7,274McCainRepublican55.5%9,430OtherAll other candidates1.7%297
R+12.7- Lead
- 2,156
- Total
- 17,001
- vs nation
- R+20.0
modeled Census-place estimatemodeled estimate
KerryDemocratic33.6%5,864BushRepublican65.5%11,422OtherAll other candidates0.9%164
R+31.9- Lead
- 5,558
- Total
- 17,450
- vs nation
- R+29.4
modeled Census-place estimatemodeled estimate
GoreDemocratic34.4%5,661BushRepublican62.6%10,302OtherAll other candidates2.9%481
R+28.2- Lead
- 4,641
- Total
- 16,444
- vs nation
- R+28.7
modeled Census-place estimatemodeled estimate
ClintonDemocratic36.0%5,817DoleRepublican51.5%8,303OtherAll other candidates12.5%2,017
R+15.4- Lead
- 2,486
- Total
- 16,137
- vs nation
- R+23.9
modeled Census-place estimatemodeled estimate
Key facts
- 2024 presidential margin
- R+40.3MIT Election Lab
- Population
- 31,7592024 5-year
- Population density
- 24 / sq mi2024 5-year · TIGER/Line
- Land area
- 1,347 sq miTIGER/Line
- Median household income
- $63,5472024 5-year
- White (non-Hispanic)
- 93.1%2024 5-year
- Black
- 0.3%2024 5-year
- Hispanic / Latino
- 2.9%2024 5-year
- Peak Democratic margin
- D+3.4 in 1912MIT Election Lab
- Peak Republican margin
- R+56.1 in 1920MIT Election Lab
- Most similar
- Delegate District 67, WV · twin score 95.3
presidential history
Party record book
Iowa 18th 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
Franklin D. Roosevelt1932
51.5%
10,978 votes · D+3.0 · modeled estimate
Runner-up · Lyndon B. Johnson, 1964 · 50.1%
Republican
Warren G. Harding1920
77.0%
15,546 votes · R+56.1 · modeled estimate
Runner-up · Dwight D. Eisenhower, 1952 · 74.7%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Franklin D. Roosevelt1932
10,978votes
51.5% of the vote · D+3.0 · modeled estimate
Runner-up · Franklin D. Roosevelt, 1936 · 10,970 votes
Republican
Dwight D. Eisenhower1952
18,558votes
74.7% of the vote · R+49.7 · modeled estimate
Runner-up · Warren G. Harding, 1920 · 15,546 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
William J. Bryan1896
−12.5pts D vs U.S.
Place R+18.5 · U.S. R+6.1 · modeled estimate
Runner-up · Franklin D. Roosevelt, 1932 · −14.8 pts
Republican
Donald Trump2020
+43.8pts R vs U.S.
Place R+39.3 · U.S. D+4.5 · modeled estimate
Runner-up · Donald Trump, 2016 · +42.9 pts
current representation
Current officeholders
RTom MooreState House · 18
State legislative officeholder from OpenStates nightly current-legislator data.
U.S. House elections · 3 House
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+40.3, this rural Iowa district ranks among the state's most consistently one-sided, leaving little competitive ground for statewide or legislative challengers.
Across the recorded series it reached a Democratic high of 3.4 points in 1912 and a Republican high of 56.1 points in 1920. Between 2020 and 2024 the district moved 1.0 points toward the Republican candidate; the 2024 margin was 40.3 points.
A population of 31,759, a 93% non-Hispanic-white share, and a median household income of $63,547 describe the district. The district's voting pattern over the last decade is most similar to that of Delegate District 67 and State House District 43.
Political twins — state-house districts
The state-house districts whose fingerprint — 2000–2024 trajectory, demographics, ancestry, religion — sits closest to this one, and why.
Delegate District 67
West Virginia
95.3twin score
2016–2024 trajectoryelasticity
State House District 43
Missouri
94.5twin score
2016–2024 trajectory12-yr trend
State House District 48
Missouri
94.1twin score
2016–2024 trajectory12-yr trend
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 →
Cite this page
All citations released under CC BY 4.0. Attribution: Akashic Intelligence.
Iowa 18th State House District. Akashic. https://akashic.app/sld-lower/19018/. Accessed May 20, 2026. License: CC BY 4.0.
License: CC BY 4.0
Iowa at the ballot boxAll elections →
Places within Iowa 18th State House District
counties it covers3
Frequently asked questions
How did Iowa 18th State House District vote in 2024?
In 2024, Iowa 18th State House District voted Republican by 40.3 points (R+40.3), carried by the Republican candidate. Out of 16,585 votes cast, 4,818 went Democratic and 11,496 went Republican.
When did Iowa 18th State House District last vote Democratic?
The most recent presidential election in which Iowa 18th State House District voted Democratic was 1964.
How many people live in Iowa 18th State House District?
Iowa 18th State House District has a population of 31,759 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Iowa 18th State House District?
Median household income in Iowa 18th State House District is $63,547 — below the national median of $80,734. The Iowa state median is $75,059.
What is the political history of Iowa 18th State House District?
Akashic tracks 38 presidential elections in Iowa 18th State House District from 1876 to 2024. Of those, 2 went Democratic and 35 went Republican.