Louisa County, Iowa: Republican loyalist county. In 2024, voted R+41%. Republican peak: R+57 in 1920.
Key facts
- 2024 presidential margin
- R+41MIT Election Lab
- Political archetype
- Republican loyalistAkashic typology
- Population
- 10,6782024 5-year
- Median household income
- $77,3542024 5-year
- White (non-Hispanic)
- 78.9%2024 5-year
- Black
- 1.0%2024 5-year
- Hispanic / Latino
- 16.4%2024 5-year
- Peak Democratic margin
- D+17 in 1964MIT Election Lab
- Peak Republican margin
- R+57 in 1920MIT Election Lab
- Most similar
- Washburn County, WI · similarity 0.99
2024 results by precinct
2024 precinct map of Louisa CountyPrecinct-level 2024 presidential results for Louisa County, with each precinct boundary colored by Democratic-vs-Republican margin.
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Margin—
Turnout—
Harris +50Trump +50
Real precinct boundaries. Hover for vote totals.
38 presidential elections
| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| R | 1,480 | 3,584 | 5,142 | ||
| R | 1,726 | 3,500 | 5,332 | ||
| R | 1,648 | 3,069 | 5,076 | ||
| D | 2,452 | 2,420 | 4,968 | ||
| D | 2,523 | 2,314 | 4,920 | ||
| R | 2,297 | 2,572 | 4,916 | ||
| D | 2,294 | 2,207 | 4,637 | ||
| D | 2,081 | 1,565 | 4,275 | ||
| D | 2,091 | 1,691 | 4,844 | ||
| D | 2,268 | 2,060 | 4,380 | ||
| R | 1,927 | 2,623 | 4,573 | ||
| R | 1,700 | 2,530 | 4,584 | ||
| R | 2,089 | 2,284 | 4,441 | ||
| R | 1,707 | 2,806 | 4,577 | ||
| R | 1,632 | 2,529 | 4,484 | ||
| D | 2,624 | 1,845 | 4,481 | ||
| R | 1,966 | 3,036 | 5,004 | ||
| R | 1,858 | 3,184 | 5,048 | ||
| R | 1,673 | 3,675 | 5,369 | ||
| R | 1,945 | 2,420 | 4,429 | ||
| R | 1,894 | 2,745 | 4,679 | ||
| R | 2,247 | 3,330 | 5,627 | ||
| D | 2,859 | 2,655 | 5,615 | ||
| D | 2,856 | 2,045 | 4,989 | ||
| R | 1,457 | 3,275 | 4,760 | ||
| R | 643 | 2,952 | 4,549 | ||
| R | 932 | 3,560 | 4,594 | ||
| R | 1,081 | 1,876 | 3,013 | ||
| R | 881 | 1,070 | 2,943 | ||
| R | 978 | 2,025 | 3,072 | ||
| R | 663 | 2,147 | 2,957 | ||
| R | 1,172 | 2,185 | 3,452 | ||
| R | 1,334 | 2,035 | 3,442 | ||
| R | 1,069 | 1,796 | 3,021 | ||
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Demographics
Race, ethnicity, and ancestry
Click any group to see the ancestries typically reported within it.
German
21.3%
English
9.6%
Irish
9.4%
American
4.7%
Scottish
2.9%
French
0.8%
African American
0.8%
Multiple ancestry combinations reported; no single grouping above 1%.
American Indian, Alaska Native, Native Hawaiian, and Pacific Islander combined.
Source · American Community Survey 5-year estimates, 2024 release. Hispanic/Latino is an ethnicity that overlaps the race categories, so these shares can total more than 100%. Ancestry is a self-reported, multiple-response item; ancestry percentages do not sum to the parent race percentage.
Age distribution by sex
Median age: 41.9 in this county, 39.1 nationally
Male
Age
Female
85+
75–84
65–74
55–64
45–54
35–44
25–34
18–24
5–17
<5
Source · American Community Survey 5-year estimates, 2024 release.
Median household income
2024 inflation-adjusted dollars
$77,354
Louisa County ranks in the top 25% of US counties.
Louisa County$77,354
Iowa$75,059
United States$80,734
Source · American Community Survey 5-year estimates, 2024 release.
Poverty rate
All persons below federal poverty line
9.8%
Child poverty is below the national average.
Children under 1814.2%
Working age (18–64)8.1%
Seniors (65+)12.1%
Source · American Community Survey 5-year estimates, 2024 release.
Language at home
Population aged 5 and older
84.7%
speak English only
Spanish12.8%
Asian & Pacific Islander1.6%
Other Indo-European0.9%
Source · ACS 5-year estimates, 2024.
Religious adherents
Adherents per capita by tradition
Source · 2020 US Religion Census. Remaining 65.4% of residents not counted as adherents by any reporting body.
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.
The Republican margin in Louisa County reached its widest at fifty-seven points in 1920. The margin in 2024 was forty-one points, in line with the county's deep historical pattern.
Its loyalty is rooted in its place. Median household income of $77,354, a 79% non-Hispanic-white share, and a population of 10,678 together describe a community whose political habits are deeply settled. The county's voting pattern over the last decade is most similar to that of Washburn County and Yellow Medicine County.
Most similar counties
Cite this page
All citations released under CC BY 4.0. Attribution: Akashic Intelligence.
Louisa County, Iowa — The Long Memory. Akashic Intelligence — The Long Memory. https://akashic.app/county/19115/. Accessed May 20, 2026. License: CC BY 4.0.
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+41), carried by the Republican candidate. Out of 5,142 votes cast, 1,480 went Democratic and 3,584 went Republican.
What is Louisa County, Iowa's political archetype?
Akashic classifies Louisa County, Iowa as a "Republican loyalist" county based on its long-arc presidential voting pattern. Across 38 elections in the dataset, the county has voted Democratic 9 times, Republican 25 times, and other 0 times.
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. The county's archetype — "Republican loyalist" — captures the overall trajectory of that voting record.