HarrisDemocratic28.8%1,480TrumpRepublican69.7%3,584KennedyWe The People1.0%49
R+40.9- Lead
- 2,104
- Total
- 5,142
- vs nation
- R+39.4
- Turnout
- 67.1%
Akashiccounty
Louisa 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 67.1% of 7,714 citizens 18+
BidenDemocratic32.4%1,726TrumpRepublican65.6%3,500JorgensenLibertarian1.3%67
R+33.3- Lead
- 1,774
- Total
- 5,332
- vs nation
- R+37.7
- Turnout
- 67.3%
ClintonDemocratic32.5%1,648TrumpRepublican60.5%3,069JohnsonLibertarian2.7%136
R+28.0- Lead
- 1,421
- Total
- 5,076
- vs nation
- R+30.1
- Turnout
- 64.2%
ObamaDemocratic49.4%2,452RomneyRepublican48.7%2,420GoodeConstitution0.4%21
D+0.6- Lead
- 32
- Total
- 4,968
- vs nation
- R+3.2
- Turnout
- —
ObamaDemocratic51.3%2,523McCainRepublican47.0%2,314OtherAll other candidates1.7%83
D+4.2- Lead
- 209
- Total
- 4,920
- vs nation
- R+3.0
- Turnout
- —
KerryDemocratic46.7%2,297BushRepublican52.3%2,572OtherAll other candidates1.0%47
R+5.6- Lead
- 275
- Total
- 4,916
- vs nation
- R+3.1
- Turnout
- —
GoreDemocratic49.5%2,294BushRepublican47.6%2,207NaderGreen1.8%85
D+1.9- Lead
- 87
- Total
- 4,637
- vs nation
- D+1.4
- Turnout
- —
ClintonDemocratic48.7%2,081DoleRepublican36.6%1,565PerotReform13.8%590
D+12.1- Lead
- 516
- Total
- 4,275
- vs nation
- D+3.5
- Turnout
- —
Key facts
- 2024 presidential margin
- R+40.9MIT Election Lab
- Population
- 10,6782024 5-year
- Population density
- 27 / sq mi2024 5-year · TIGER/Line
- Land area
- 402 sq miTIGER/Line
- Median household income
- $77,3542024 5-year
- White (non-Hispanic)
- 77.0%2024 5-year
- Black
- 0.9%2024 5-year
- Hispanic / Latino
- 16.4%2024 5-year
- Peak Democratic margin
- D+17.4 in 1964MIT Election Lab
- Peak Republican margin
- R+57.2 in 1920MIT Election Lab
- Most similar
- Tama County, IA · twin score 81.9
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
- 67.1%5,178 participants ÷ 7,714 CVAP
- 2020→2022 drop-off
- +22.0 ptsPresidential-dependent
- Drop-off versus state
- +1.0 ptsPositive means a larger decline than the statewide pattern
- Mechanical 2026 scenario
- 45.1%–48.4%Recent-cycle and two-cycle persistence scenarios; not a forecast
| Election | Participants | CVAP | Turnout | Quality |
|---|---|---|---|---|
| 2016 · Presidential | 5,076 | 7,903 | 64.2% | A/A |
| 2018 · Midterm | 3,854 | 7,894 | 48.8% | A/A |
| 2020 · Presidential | 5,372 | 7,977 | 67.3% | A/A |
| 2022 · Midterm | 3,561 | 7,856 | 45.3% | A/A |
| 2024 · Presidential | 5,178 | 7,714 | 67.1% | 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
Louisa 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
58.6%
2,624 votes · D+17.4
Runner-up · Franklin D. Roosevelt, 1932 · 57.2%
Republican
Warren G. Harding1920
77.5%
3,560 votes · R+57.2
Runner-up · Theodore Roosevelt, 1904 · 72.6%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Franklin D. Roosevelt1936
2,859votes
50.9% of the vote · D+3.6
Runner-up · Franklin D. Roosevelt, 1932 · 2,856 votes
Republican
Dwight D. Eisenhower1952
3,675votes
68.4% of the vote · R+37.3
Runner-up · Donald Trump, 2024 · 3,584 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
+12.5pts D vs U.S.
Place D+4.7 · U.S. R+7.7
Runner-up · Bill Clinton, 1996 · +3.5 pts
Republican
Donald Trump2024
+39.4pts R vs U.S.
Place R+40.9 · U.S. R+1.5
Runner-up · Donald Trump, 2020 · +37.7 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+20.1
Presidential vote · 2024R+40.9
Registration leans Republican; the presidential vote runs 21 points more Republican than the rolls.
DemocraticRepublicanUnaffiliatedOther parties
| Year | Total registered | Democratic | Republican | Unaffiliated | Other |
|---|---|---|---|---|---|
| 2008 | 7,685 | 2,329 | 2,454 | 2,902 | 0 |
| 2010 | 7,478 | 2,070 | 2,612 | 2,794 | 2 |
| 2012 | 7,523 | 2,045 | 2,581 | 2,895 | 2 |
| 2014 | 7,410 | 1,930 | 2,515 | 2,955 | 10 |
| 2016 | 7,483 | 1,859 | 2,651 | 2,953 | 20 |
| 2018 | 7,200 | 1,770 | 2,496 | 2,903 | 31 |
| 2020 | 7,335 | 1,839 | 2,867 | 2,590 | 39 |
| 2022 | 7,312 | 1,716 | 2,890 | 2,667 | 39 |
| 2024 | 7,403 | 1,530 | 3,017 | 2,807 | 49 |
domestic migration
Who moves in and out
Net migration over time, and who arrivals are — where they came from and what those places vote
−135 net domestic migration · 2025
20112025
Net −1,421 over 2011–2025 · gain loss
Arrivals reported $48,676 in average income, against $74,417 for residents who stayed — 35% lower. (IRS SOI, 2022–23)
The places arrivals came from lean R+6.3 on average — 35 points more Democratic-leaning than Louisa County, IA itself (R+40.9).
Where arrivals came from lean of each source
- Muscatine County, IA82R+14.9
- Des Moines County, IA20R+15.0
- Johnson County, IA20D+37.8
Where departures went households, 2022–23
- Muscatine County, IA82
- Des Moines County, IA33
- Johnson County, IA33
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 | −47 |
| 2012 | −82 |
| 2013 | −81 |
| 2014 | −184 |
| 2015 | −57 |
| 2016 | −154 |
| 2017 | −81 |
| 2018 | −97 |
| 2019 | −151 |
| 2021 | −85 |
| 2022 | −132 |
| 2023 | −159 |
| 2024 | +24 |
| 2025 | −135 |
Louisa County sits along the Iowa–Illinois border and has moved from a perennial swing county in the early 2000s to one of Iowa's most lopsided presidential results, reflecting broader rural realignment across the state's agricultural flatlands.
Across the recorded series it reached a Democratic high of 17.4 points in 1964 and a Republican high of 57.2 points in 1920. Between 2020 and 2024 the county moved 7.6 points toward the Republican candidate; the 2024 margin was 40.9 points.
A population of 10,678, a 77% non-Hispanic-white share, and a median household income of $77,354 describe the county. The county's voting pattern over the last decade is most similar to that of Tama County and Warren County.
Political twins — counties
The counties whose fingerprint — 2000–2024 trajectory, demographics, ancestry, religion — sits closest to this one, and why.
Tama County
Iowa
81.9twin score
12-yr trendelasticity2000–2012 trajectory≠ Scottish ancestry
Warren County
Illinois
81.8twin score
elasticity12-yr trend2008–2012 trajectory≠ Swedish ancestry
Wapello County
Iowa
81.2twin score
12-yr trend2000–2012 trajectory≠ Scottish ancestry
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.
Louisa County, Iowa. Akashic. https://akashic.app/county/19115/. Accessed May 20, 2026. License: CC BY 4.0.
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Frequently asked questions
How did Louisa County, Iowa vote in 2024?
In 2024, Louisa County, Iowa voted Republican by 40.9 points (R+40.9), carried by the Republican candidate. Out of 5,142 votes cast, 1,480 went Democratic and 3,584 went Republican.
When did Louisa County, Iowa last vote Democratic?
The most recent presidential election in which Louisa County, Iowa voted Democratic was 2012.
How many people live in Louisa County, Iowa?
Louisa County, Iowa has a population of 10,678 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Louisa County, Iowa?
Median household income in Louisa County, Iowa is $77,354 — below the national median of $80,734. The Iowa state median is $75,059.
What is the political history of Louisa County, Iowa?
Akashic tracks 38 presidential elections in Louisa County, Iowa from 1876 to 2024. Of those, 9 went Democratic and 25 went Republican.