HarrisDemocratic27.2%9,330TrumpRepublican71.1%24,386OtherAll other candidates1.7%580
R+43.9- Lead
- 15,056
- Total
- 34,296
- vs nation
- R+42.4
modeled Census-place estimatemodeled estimate
Akashicstate senate district
Iowa 12th State Senate 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
BidenDemocratic29.9%10,257TrumpRepublican68.5%23,493OtherAll other candidates1.6%537
R+38.6- Lead
- 13,236
- Total
- 34,287
- vs nation
- R+43.1
modeled Census-place estimatemodeled estimate
ClintonDemocratic29.9%9,466TrumpRepublican62.9%19,893OtherAll other candidates7.2%2,280
R+33.0- Lead
- 10,427
- Total
- 31,639
- vs nation
- R+35.0
modeled Census-place estimatemodeled estimate
ObamaDemocratic44.3%13,908RomneyRepublican53.4%16,760OtherAll other candidates2.2%702
R+9.1- Lead
- 2,852
- Total
- 31,370
- vs nation
- R+12.9
modeled Census-place estimatemodeled estimate
ObamaDemocratic45.8%14,474McCainRepublican52.1%16,474OtherAll other candidates2.2%683
R+6.3- Lead
- 2,000
- Total
- 31,631
- vs nation
- R+13.6
modeled Census-place estimatemodeled estimate
KerryDemocratic43.9%13,773BushRepublican55.0%17,239OtherAll other candidates1.0%327
R+11.1- Lead
- 3,466
- Total
- 31,339
- vs nation
- R+8.6
modeled Census-place estimatemodeled estimate
GoreDemocratic44.4%12,636BushRepublican53.0%15,088OtherAll other candidates2.7%766
R+8.6- Lead
- 2,452
- Total
- 28,490
- vs nation
- R+9.1
modeled Census-place estimatemodeled estimate
ClintonDemocratic49.4%13,411DoleRepublican39.4%10,696OtherAll other candidates11.3%3,068
D+10.0- Lead
- 2,715
- Total
- 27,175
- vs nation
- D+1.5
modeled Census-place estimatemodeled estimate
Key facts
- 2024 presidential margin
- R+43.9MIT Election Lab
- Population
- 63,6042024 5-year
- Population density
- 19 / sq mi2024 5-year · TIGER/Line
- Land area
- 3,432 sq miTIGER/Line
- Median household income
- $72,9552024 5-year
- White (non-Hispanic)
- 91.8%2024 5-year
- Black
- 0.5%2024 5-year
- Hispanic / Latino
- 4.2%2024 5-year
- Peak Democratic margin
- D+24.3 in 1964MIT Election Lab
- Peak Republican margin
- R+43.9 in 2024MIT Election Lab
- Most similar
- State Senate District 19, IA · twin score 96.5
presidential history
Party record book
Iowa 12th State Senate 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
62.1%
19,755 votes · D+24.3 · modeled estimate
Runner-up · Franklin D. Roosevelt, 1932 · 57.8%
Republican
Donald Trump2024
71.1%
24,386 votes · R+43.9 · modeled estimate
Runner-up · Donald Trump, 2020 · 68.5%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Franklin D. Roosevelt1936
21,988votes
49.5% of the vote · D+0.2 · modeled estimate
Runner-up · Franklin D. Roosevelt, 1940 · 20,152 votes
Republican
Dwight D. Eisenhower1952
25,917votes
65.3% of the vote · R+31.2 · modeled estimate
Runner-up · Warren G. Harding, 1920 · 25,433 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
+22.6pts D vs U.S.
Place D+14.9 · U.S. R+7.7 · modeled estimate
Runner-up · Walter Mondale, 1984 · +12.9 pts
Republican
Donald Trump2020
+43.1pts R vs U.S.
Place R+38.6 · U.S. D+4.5 · modeled estimate
Runner-up · Donald Trump, 2024 · +42.4 pts
current representation
Current officeholders
RAmy SinclairState Senate · 12
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+43.9, this rural Iowa district ranks among the state's most lopsided, reflecting the deep consolidation of non-urban sentiment that has reshaped Iowa's political geography over the past decade.
Across the recorded series it reached a Democratic high of 24.3 points in 1964 and a Republican high of 43.9 points in 2024. Between 2020 and 2024 the district moved 5.3 points toward the Republican candidate; the 2024 margin was 43.9 points.
A population of 63,604, a 92% non-Hispanic-white share, and a median household income of $72,955 describe the district. The district's voting pattern over the last decade is most similar to that of State Senate District 19 and State Senate District 44.
Political twins — state-senate districts
The state-senate districts whose fingerprint — 2000–2024 trajectory, demographics, ancestry, religion — sits closest to this one, and why.
State Senate District 19
Iowa
96.5twin score
12-yr trend2016–2024 trajectory
State Senate District 44
Iowa
95.1twin score
12-yr trend2016–2024 trajectory≠ Scottish ancestry
State Senate District 13
Iowa
93.4twin score
12-yr trend2016–2024 trajectory
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 12th State Senate District. Akashic. https://akashic.app/sld-upper/19012/. Accessed May 20, 2026. License: CC BY 4.0.
License: CC BY 4.0
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Places within Iowa 12th State Senate District
Frequently asked questions
How did Iowa 12th State Senate District vote in 2024?
In 2024, Iowa 12th State Senate District voted Republican by 43.9 points (R+43.9), carried by the Republican candidate. Out of 34,296 votes cast, 9,330 went Democratic and 24,386 went Republican.
When did Iowa 12th State Senate District last vote Democratic?
The most recent presidential election in which Iowa 12th State Senate District voted Democratic was 1996.
How many people live in Iowa 12th State Senate District?
Iowa 12th State Senate District has a population of 63,604 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Iowa 12th State Senate District?
Median household income in Iowa 12th State Senate District is $72,955 — below the national median of $80,734. The Iowa state median is $75,059.
What is the political history of Iowa 12th State Senate District?
Akashic tracks 38 presidential elections in Iowa 12th State Senate District from 1876 to 2024. Of those, 9 went Democratic and 29 went Republican.