Hamilton County, Indiana: Republican loyalist county. In 2024, voted R+6%. Republican peak: R+66 in 1972.
Key facts
- 2024 presidential margin
- R+6MIT Election Lab
- Political archetype
- Republican loyalistAkashic typology
- Population
- 365,0562024 5-year
- Median household income
- $121,5302024 5-year
- White (non-Hispanic)
- 80.2%2024 5-year
- Black
- 4.5%2024 5-year
- Hispanic / Latino
- 5.6%2024 5-year
- Peak Democratic margin
- D+3 in 1912MIT Election Lab
- Peak Republican margin
- R+66 in 1972MIT Election Lab
- Most similar
- Douglas County, CO · similarity 0.99
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.
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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 | 90,394 | 102,318 | 197,767 | ||
| R | 88,390 | 101,587 | 193,999 | ||
| R | 57,214 | 87,299 | 155,812 | ||
| R | 43,796 | 90,747 | 137,089 | ||
| R | 49,704 | 78,401 | 129,064 | ||
| R | 26,388 | 77,887 | 104,906 | ||
| R | 18,002 | 56,372 | 75,926 | ||
| R | 14,153 | 42,792 | 61,619 | ||
| R | 10,215 | 34,622 | 55,434 | ||
| R | 8,853 | 36,654 | 45,615 | ||
| R | 6,364 | 30,254 | 36,761 | ||
| R | 7,036 | 26,218 | 35,327 | ||
| R | 7,857 | 21,828 | 29,958 | ||
| R | 4,151 | 20,247 | 24,470 | ||
| R | 4,586 | 14,250 | 21,069 | ||
| R | 7,553 | 12,060 | 19,681 | ||
| R | 5,511 | 13,409 | 18,984 | ||
| R | 4,974 | 11,220 | 16,271 | ||
| R | 4,564 | 10,843 | 15,560 | ||
| R | 4,384 | 7,521 | 12,107 | ||
| R | 4,101 | 8,297 | 12,560 | ||
| R | 4,791 | 8,931 | 13,797 | ||
| R | 5,396 | 7,323 | 12,870 | ||
| R | 5,999 | 7,100 | 13,376 | ||
| R | 3,611 | 7,960 | 11,645 | ||
| R | 3,785 | 7,463 | 11,498 | ||
| R | 4,280 | 7,897 | 12,527 | ||
| R | 2,799 | 3,951 | 7,212 | ||
| D | 2,463 | 2,247 | 7,052 | ||
| R | 2,947 | 4,421 | 7,828 | ||
| R | 2,469 | 4,832 | 7,610 | ||
| R | 2,931 | 4,788 | 8,168 | ||
| R | 2,947 | 4,643 | 7,761 | ||
| R | 2,492 | 3,627 | 6,652 | ||
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Demographics
Race, ethnicity, and ancestry
Click any group to see the ancestries typically reported within it.
German
23.5%
English
15.0%
Irish
11.4%
American
4.9%
Italian
4.1%
Polish
3.4%
Scottish
2.2%
African American
3.6%
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: 38.4 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
$121,530
Hamilton County ranks in the top 0.5% of US counties.
Hamilton County$121,530
Indiana$71,957
United States$80,734
Source · American Community Survey 5-year estimates, 2024 release.
Poverty rate
All persons below federal poverty line
4.4%
Child poverty is below the national average.
Children under 184.4%
Working age (18–64)4.3%
Seniors (65+)5.8%
Source · American Community Survey 5-year estimates, 2024 release.
Language at home
Population aged 5 and older
87.5%
speak English only
Other Indo-European4.0%
Asian & Pacific Islander3.6%
Spanish3.4%
Other languages1.4%
Source · ACS 5-year estimates, 2024.
Religious adherents
Adherents per capita by tradition
Source · 2020 US Religion Census. Remaining 60.0% of residents not counted as adherents by any reporting body.
Hamilton County's rapid suburban growth north of Indianapolis has compressed Republican margins from landslide territory to the mid-single digits, making it a bellwether for how college-educated exurban voters are reshaping Indiana's political math.
The Republican margin in Hamilton County reached its widest at sixty-six points in 1972. The margin in 2024 was six points, in line with the county's deep historical pattern.
Its loyalty is rooted in its place. Median household income of $121,530, a 80% non-Hispanic-white share, and a population of 365,056 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 Douglas County and Delaware County.
Most similar counties
Cite this page
All citations released under CC BY 4.0. Attribution: Akashic Intelligence.
Hamilton County, Indiana — The Long Memory. Akashic Intelligence — The Long Memory. https://akashic.app/county/18057/. Accessed May 20, 2026. License: CC BY 4.0.
License: CC BY 4.0
More republican loyalist counties
Frequently asked questions
How did Hamilton County, Indiana vote in 2024?
In 2024, Hamilton County, Indiana voted Republican by 6.0 points (R+6), carried by the Republican candidate. Out of 197,767 votes cast, 90,394 went Democratic and 102,318 went Republican.
What is Hamilton County, Indiana's political archetype?
Akashic classifies Hamilton County, Indiana as a "Republican loyalist" county based on its long-arc presidential voting pattern. Across 38 elections in the dataset, the county has voted Democratic 1 times, Republican 33 times, and other 0 times.
When did Hamilton County, Indiana last vote Democratic?
The most recent presidential election in which Hamilton County, Indiana voted Democratic was 1912.
How many people live in Hamilton County, Indiana?
Hamilton County, Indiana has a population of 365,056 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Hamilton County, Indiana?
Median household income in Hamilton County, Indiana is $121,530 — above the national median of $80,734. The Indiana state median is $71,957.
What is the political history of Hamilton County, Indiana?
Akashic tracks 38 presidential elections in Hamilton County, Indiana from 1876 to 2024. Of those, 1 went Democratic and 33 went Republican. The county's archetype — "Republican loyalist" — captures the overall trajectory of that voting record.