Hamilton County, Iowa: Florida Surge county. In 2024, voted R+33%. Republican peak: R+67 in 1920.
Key facts
- 2024 presidential margin
- R+33MIT Election Lab
- Political typology
- Florida SurgeAkashic typology
- Population
- 14,8862024 5-year
- Median household income
- $72,4322024 5-year
- White (non-Hispanic)
- 86.5%2024 5-year
- Black
- 1.0%2024 5-year
- Hispanic / Latino
- 10.1%2024 5-year
- Peak Democratic margin
- D+38 in 1932MIT Election Lab
- Peak Republican margin
- R+67 in 1920MIT Election Lab
- Most similar
- Hardin County, IA · similarity 1.00
2024 results by precinct
2024 precinct map of Hamilton CountyPrecinct-level 2024 presidential results for Hamilton County, with each precinct boundary colored by Democratic-vs-Republican margin.
—
Margin—
Turnout—
Harris +50Trump +50
Real precinct boundaries. Hover for vote totals.
presidential history
Presidential margin, 1876–2024
Democratic minus Republican, by election
| Year | Margin (D minus R) |
|---|---|
| 1876 | No data |
| 1880 | No data |
| 1884 | No data |
| 1888 | No data |
| 1892 | −25.1% |
| 1896 | −40.0% |
| 1900 | −47.7% |
| 1904 | −58.6% |
| 1908 | −39.9% |
| 1912 | +4.9% |
| 1916 | −44.7% |
| 1920 | −67.1% |
| 1924 | −54.0% |
| 1928 | −16.6% |
| 1932 | +37.5% |
| 1936 | +25.8% |
| 1940 | +11.5% |
| 1944 | +5.7% |
| 1948 | +1.1% |
| 1952 | −42.9% |
| 1956 | −19.3% |
| 1960 | −14.8% |
| 1964 | +24.8% |
| 1968 | −19.4% |
| 1972 | −24.0% |
| 1976 | +0.3% |
| 1980 | −24.2% |
| 1984 | −12.3% |
| 1988 | +11.7% |
| 1992 | +3.0% |
| 1996 | +4.8% |
| 2000 | −7.4% |
| 2004 | −5.7% |
| 2008 | +1.3% |
| 2012 | −2.6% |
| 2016 | −22.3% |
| 2020 | −26.6% |
| 2024 | −33.2% |
DemocraticRepublican
38 presidential elections
| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| R | 2,482 | 5,004 | 7,597 | ||
| R | 2,843 | 4,956 | 7,943 | ||
| R | 2,726 | 4,463 | 7,785 | ||
| R | 3,782 | 3,991 | 7,927 | ||
| D | 4,018 | 3,913 | 8,078 | ||
| R | 3,895 | 4,367 | 8,335 | ||
| R | 3,407 | 3,968 | 7,574 | ||
| D | 3,455 | 3,109 | 7,277 | ||
| D | 3,262 | 3,031 | 7,681 | ||
| D | 4,156 | 3,277 | 7,494 | ||
| R | 3,330 | 4,279 | 7,695 | ||
| R | 2,741 | 4,745 | 8,266 | ||
| D | 3,953 | 3,932 | 8,025 | ||
| R | 2,913 | 4,803 | 7,890 | ||
| R | 3,058 | 4,607 | 8,001 | ||
| D | 5,195 | 3,127 | 8,332 | ||
| R | 3,905 | 5,265 | 9,174 | ||
| R | 3,829 | 5,667 | 9,514 | ||
| R | 2,788 | 7,006 | 9,828 | ||
| D | 3,613 | 3,535 | 7,345 | ||
| D | 4,302 | 3,837 | 8,180 | ||
| D | 5,279 | 4,183 | 9,501 | ||
| D | 5,432 | 3,174 | 8,758 | ||
| D | 5,191 | 2,330 | 7,624 | ||
| R | 2,975 | 4,171 | 7,190 | ||
| R | 490 | 4,401 | 7,246 | ||
| R | 1,126 | 5,924 | 7,148 | ||
| R | 1,125 | 3,037 | 4,281 | ||
| O | 1,041 | 831 | 4,290 | ||
| R | 1,145 | 2,765 | 4,056 | ||
| R | 746 | 3,118 | 4,045 | ||
| R | 1,134 | 3,259 | 4,455 | ||
| R | 1,300 | 3,074 | 4,439 | ||
| R | 1,227 | 2,073 | 3,373 | ||
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Demographics
2024 ACS
Race, ethnicity, and ancestry
Click any group to see the ancestries typically reported within it.
German
29.8%
English
8.2%
Irish
7.4%
American
3.3%
Scottish
2.2%
French
2.0%
Italian
0.6%
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.
2024 ACS
Age distribution by sex
Median age: 41.7 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.
2024 ACS
Median household income
Inflation-adjusted dollars
$72,432
Hamilton County ranks near the middle of US counties.
Hamilton County$72,432
Iowa$75,059
United States$80,734
Hamilton County ranks near the middle of US counties by median household income.
Source · American Community Survey 5-year estimates, 2024 release.
2024 ACS
Poverty rate
All persons below federal poverty line
7.4%
Child poverty is below the national average.
Children under 185.4%
Working age (18–64)8.0%
Seniors (65+)8.2%
Source · American Community Survey 5-year estimates, 2024 release.
2024 ACS
Language at home
Population aged 5 and older
89.3%
speak English only
Spanish8.2%
Asian & Pacific Islander1.7%
Other Indo-European0.6%
Other languages0.2%
Source · ACS 5-year estimates, 2024.
2020 religion census
Religious adherents
Adherents per capita by tradition
Source · 2020 US Religion Census. Remaining 50.3% of residents not counted as adherents by any reporting body.
Hamilton County's agricultural economy and sparse small-town population have pushed its presidential margins steadily rightward over the past two decades, landing at R+33.2 in 2024 — well above the statewide average.
The Democratic margin here once reached thirty-eight points in 1932. Between 2020 and 2024 the county moved seven points toward the Republican candidate; the 2024 margin was thirty-three points.
A population of 14,886, a 87% non-Hispanic-white share, and a median household income of $72,432 describe the county. The county's voting pattern over the last decade is most similar to that of Hardin County and Carroll County.
Most similar counties
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.
Hamilton County, Iowa. Akashic. https://akashic.app/county/19079/. Accessed May 20, 2026. License: CC BY 4.0.
License: CC BY 4.0
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Frequently asked questions
How did Hamilton County, Iowa vote in 2024?
In 2024, Hamilton County, Iowa voted Republican by 33.2 points (R+33), carried by the Republican candidate. Out of 7,597 votes cast, 2,482 went Democratic and 5,004 went Republican.
What is Hamilton County, Iowa's political typology?
Akashic places Hamilton County, Iowa in the "Florida Surge" typology — Florida coastal and retiree counties that moved sharply Republican across the Trump era. The typology is a data-driven cluster built from vote share, vote swing, race and ethnicity, income, language spoken at home, religion, and ancestry. Across 38 elections in the dataset, the county has voted Democratic 11 times, Republican 22 times, and other 1 times.
When did Hamilton County, Iowa last vote Democratic?
The most recent presidential election in which Hamilton County, Iowa voted Democratic was 2008.
How many people live in Hamilton County, Iowa?
Hamilton County, Iowa has a population of 14,886 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Hamilton County, Iowa?
Median household income in Hamilton County, Iowa is $72,432 — below the national median of $80,734. The Iowa state median is $75,059.
What is the political history of Hamilton County, Iowa?
Akashic tracks 38 presidential elections in Hamilton County, Iowa from 1876 to 2024. Of those, 11 went Democratic and 22 went Republican. The county's typology — "Florida Surge" — captures where that record, its demographics, and its recent swing place it among American communities.