HarrisDemocratic46.7%29,402TrumpRepublican51.4%32,374KennedyWe The People0.8%479
R+4.7- Lead
- 2,972
- Total
- 62,961
- vs nation
- R+3.2
- Turnout
- 84.9%
Akashiccounty
Dallas County, IA
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 county’s overall result across 1892–2024.
President results by year
2024 turnout 84.9% of 74,583 citizens 18+
BidenDemocratic48.0%26,879TrumpRepublican50.0%27,987JorgensenLibertarian1.3%744
R+2.0- Lead
- 1,108
- Total
- 56,022
- vs nation
- R+6.4
- Turnout
- 90.6%
ClintonDemocratic40.7%15,701TrumpRepublican50.1%19,339JohnsonLibertarian4.6%1,757
R+9.4- Lead
- 3,638
- Total
- 38,588
- vs nation
- R+11.5
- Turnout
- 73.1%
ObamaDemocratic43.5%16,576RomneyRepublican55.1%20,988GrayLibertarian0.7%273
R+11.6- Lead
- 4,412
- Total
- 38,116
- vs nation
- R+15.4
- Turnout
- —
ObamaDemocratic46.4%15,149McCainRepublican51.9%16,954OtherAll other candidates1.6%537
R+5.5- Lead
- 1,805
- Total
- 32,640
- vs nation
- R+12.8
- Turnout
- —
KerryDemocratic41.5%10,917BushRepublican57.7%15,183OtherAll other candidates0.7%193
R+16.2- Lead
- 4,266
- Total
- 26,293
- vs nation
- R+13.8
- Turnout
- —
GoreDemocratic44.3%8,561BushRepublican53.3%10,306NaderGreen1.7%320
R+9.0- Lead
- 1,745
- Total
- 19,330
- vs nation
- R+9.5
- Turnout
- —
ClintonDemocratic50.1%8,017DoleRepublican41.5%6,647PerotReform7.5%1,198
D+8.6- Lead
- 1,370
- Total
- 16,010
- vs nation
- Even
- Turnout
- —
Key facts
- 2024 presidential margin
- R+4.7MIT Election Lab
- Population
- 107,9682024 5-year
- Population density
- 184 / sq mi2024 5-year · TIGER/Line
- Land area
- 588 sq miTIGER/Line
- Median household income
- $102,3792024 5-year
- White (non-Hispanic)
- 80.9%2024 5-year
- Black
- 3.0%2024 5-year
- Hispanic / Latino
- 6.9%2024 5-year
- Peak Democratic margin
- D+32.7 in 1964MIT Election Lab
- Peak Republican margin
- R+52.9 in 1924MIT Election Lab
- Most similar
- Olmsted County, MN · twin score 90.1
Midterm durability
Total general-election participants divided by same-year citizen voting-age population. These are total ballots or participating voters—not presidential candidate votes.
- 2024 total turnout
- 84.9%63,330 participants ÷ 74,583 CVAP
- 2020→2022 drop-off
- +26.2 ptsPresidential-dependent
- Drop-off versus state
- +5.2 ptsPositive means a larger decline than the statewide pattern
- Mechanical 2026 scenario
- 58.7%–71.9%Recent-cycle and two-cycle persistence scenarios; not a forecast
| Election | Participants | CVAP | Turnout | Quality |
|---|---|---|---|---|
| 2016 · Presidential | 38,588 | 52,794 | 73.1% | A/A |
| 2018 · Midterm | 41,853 | 57,044 | 73.4% | A/A |
| 2020 · Presidential | 56,268 | 62,092 | 90.6% | A/A |
| 2022 · Midterm | 44,857 | 69,664 | 64.4% | A/A |
| 2024 · Presidential | 63,330 | 74,583 | 84.9% | A/A |
Sources and methods
- 2016: numerator source 158, denominator source 157; total voters participating; eavs-f1a-v1:observed:native; allocation share 0.0%; series 293/111.
- 2018: numerator source 158, denominator source 157; total voters participating; eavs-f1a-v1:observed:native; allocation share 0.0%; series 297/138.
- 2020: numerator source 158, denominator source 157; total voters participating; eavs-f1a-v1:observed:native; allocation share 0.0%; series 301/2.
- 2022: numerator source 158, denominator source 157; total voters participating; eavs-f1a-v1:observed:native; allocation share 0.0%; series 306/183.
- 2024: numerator source 158, denominator source 157; total voters participating; eavs-f1a-v1:observed:native; allocation share 0.0%; series 311/228.
presidential history
Party record book
Dallas County, IA · the strongest Democratic and Republican presidential performances recorded here, measured three ways.
1892–2024 · 34 presidential cycles
Highest vote share
Largest share of the presidential candidate vote cast here.
Democratic
Lyndon B. Johnson1964
66.1%
7,447 votes · D+32.7
Runner-up · Michael Dukakis, 1988 · 60.4%
Republican
Warren G. Harding1920
70.6%
6,677 votes · R+43.4
Runner-up · Theodore Roosevelt, 1904 · 70.0%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Kamala Harris2024
29,402votes
46.7% of the vote · R+4.7
Runner-up · Joe Biden, 2020 · 26,879 votes
Republican
Donald Trump2024
32,374votes
51.4% of the vote · R+4.7
Runner-up · Donald Trump, 2020 · 27,987 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
+29.0pts D vs U.S.
Place D+21.3 · U.S. R+7.7
Runner-up · Walter Mondale, 1984 · +22.0 pts
Republican
Calvin Coolidge1924
+27.7pts R vs U.S.
Place R+52.9 · U.S. R+25.2
Runner-up · Theodore Roosevelt, 1904 · +27.1 pts
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 shows U.S. House votes counted inside this Place. “Vote lead” is the local lead here, not necessarily the winner of the full contest.
voter registration
Registered voters
By party of registration, over time
Party registration · 2024R+7.5
Presidential vote · 2024R+4.7
Registration and the presidential vote track closely here — within 2.7 points.
DemocraticRepublicanUnaffiliatedOther parties
| Year | Total registered | Democratic | Republican | Unaffiliated | Other |
|---|---|---|---|---|---|
| 2008 | 42,156 | 11,583 | 13,977 | 16,582 | 14 |
| 2010 | 45,626 | 11,517 | 15,844 | 18,238 | 27 |
| 2012 | 49,373 | 11,696 | 17,879 | 19,751 | 47 |
| 2014 | 53,006 | 11,704 | 18,748 | 22,420 | 134 |
| 2016 | 57,150 | 13,706 | 21,218 | 21,949 | 277 |
| 2018 | 61,468 | 15,367 | 21,376 | 24,153 | 572 |
| 2020 | 68,331 | 20,371 | 24,011 | 23,323 | 626 |
| 2022 | 72,779 | 20,828 | 24,875 | 26,418 | 658 |
| 2024 | 78,403 | 21,316 | 27,166 | 29,170 | 751 |
domestic migration
Who moves in and out
Net migration over time, and who arrivals are — where they came from and what those places vote
+2,532 net domestic migration · 2025
20112025
Net +29,530 over 2011–2025 · gain loss
Arrivals reported $79,479 in average income, against $144,522 for residents who stayed — 45% lower. (IRS SOI, 2022–23)
The places arrivals came from lean D+5.5 on average — 10 points more Democratic-leaning than Dallas County, IA itself (R+4.7).
Where arrivals came from lean of each source
- Polk County, IA2,531D+10.8
- Warren County, IA132R+20.6
- Story County, IA116D+10.3
- Johnson County, IA74D+37.8
- Black Hawk County, IA70D+1.2
- Madison County, IA70R+38.5
Where departures went households, 2022–23
- Polk County, IA2,125
- Warren County, IA165
- Story County, IA93
- Madison County, IA85
- Boone County, IA59
- Maricopa County, AZ57
Migration is one input to a place’s political change, not its cause — a shift can also come from residents changing their minds, generational turnover, or turnout. These figures describe the places people moved between; they do not measure how any mover voted.
| Year | Net domestic migration |
|---|---|
| 2011 | +2,044 |
| 2012 | +1,528 |
| 2013 | +1,535 |
| 2014 | +1,657 |
| 2015 | +1,786 |
| 2016 | +2,559 |
| 2017 | +1,885 |
| 2018 | +1,895 |
| 2019 | +2,577 |
| 2021 | +2,913 |
| 2022 | +2,729 |
| 2023 | +1,852 |
| 2024 | +2,038 |
| 2025 | +2,532 |
Rapid population growth west of Des Moines has transformed Dallas County from a heavily Republican stronghold into one of Iowa's most competitive suburban battlegrounds, with the 2024 presidential margin tightening to R+4.7.
Across the recorded series it reached a Democratic high of 32.7 points in 1964 and a Republican high of 52.9 points in 1924. Between 2020 and 2024 the county moved 2.7 points toward the Republican candidate; the 2024 margin was 4.7 points.
A population of 107,968, a 81% non-Hispanic-white share, and a median household income of $102,379 describe the county. The county's voting pattern over the last decade is most similar to that of Olmsted County and Broomfield County.
Political twins — counties
The counties whose fingerprint — 2000–2024 trajectory, demographics, ancestry, religion — sits closest to this one, and why.
Olmsted County
Minnesota
90.1twin score
12-yr trendcollege sharemedian income≠ Irish ancestry
Broomfield County
Colorado
89.7twin score
college share% Evangelical2020 margin≠ 12-yr trend
McLean County
Illinois
88.0twin score
12-yr trendcollege share2020–2024 trajectory≠ median income
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.
Browse places by community — income, education, race & ethnicity, language — all community cuts →
Compare two places, side by side
Twelve curated comparisons line up election history, demographics, and the divergence story for two places at a glance. Browse all comparisons →
Cite this page
All citations released under CC BY 4.0. Attribution: Akashic Intelligence.
Dallas County, Iowa. Akashic. https://akashic.app/county/19049/. Accessed May 20, 2026. License: CC BY 4.0.
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Cities & towns in Dallas County
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Frequently asked questions
How did Dallas County, Iowa vote in 2024?
In 2024, Dallas County, Iowa voted Republican by 4.7 points (R+4.7), carried by the Republican candidate. Out of 62,961 votes cast, 29,402 went Democratic and 32,374 went Republican.
When did Dallas County, Iowa last vote Democratic?
The most recent presidential election in which Dallas County, Iowa voted Democratic was 1996.
How many people live in Dallas County, Iowa?
Dallas County, Iowa has a population of 107,968 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Dallas County, Iowa?
Median household income in Dallas County, Iowa is $102,379 — above the national median of $80,734. The Iowa state median is $75,059.
What is the political history of Dallas County, Iowa?
Akashic tracks 38 presidential elections in Dallas County, Iowa from 1876 to 2024. Of those, 10 went Democratic and 24 went Republican.