Hamilton County, Indiana: Realigning Affluent Suburb county. In 2024, voted R+6%. Republican peak: R+66 in 1972.
Key facts
- 2024 presidential margin
- R+6MIT Election Lab
- Political typology
- Realigning Affluent SuburbAkashic 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.
—
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 | −17.1% |
| 1896 | −21.9% |
| 1900 | −22.7% |
| 1904 | −31.1% |
| 1908 | −18.8% |
| 1912 | +3.1% |
| 1916 | −16.0% |
| 1920 | −28.9% |
| 1924 | −32.0% |
| 1928 | −37.3% |
| 1932 | −8.2% |
| 1936 | −15.0% |
| 1940 | −30.0% |
| 1944 | −33.4% |
| 1948 | −25.9% |
| 1952 | −40.4% |
| 1956 | −38.4% |
| 1960 | −41.6% |
| 1964 | −22.9% |
| 1968 | −45.9% |
| 1972 | −65.8% |
| 1976 | −46.6% |
| 1980 | −54.3% |
| 1984 | −65.0% |
| 1988 | −60.9% |
| 1992 | −44.0% |
| 1996 | −46.5% |
| 2000 | −50.5% |
| 2004 | −49.1% |
| 2008 | −22.2% |
| 2012 | −34.2% |
| 2016 | −19.3% |
| 2020 | −6.8% |
| 2024 | −6.0% |
DemocraticRepublican
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
2024 ACS
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.
2024 ACS
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.
2024 ACS
Median household income
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
Hamilton County ranks in the top 0.5% 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
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.
2024 ACS
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.
2020 religion census
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.
Once reliably Republican — a margin of sixty-six points in 1972 at its widest — Hamilton County has trended Democratic. Between 2020 and 2024 the county moved one point toward the Democratic candidate; the 2024 margin was six points.
A median household income of $121,530 — among the higher at this geographic scale — and a population of 365,056 describe the county. The county's voting pattern over the last decade is most similar to that of Douglas County and Delaware 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, Indiana. Akashic. https://akashic.app/county/18057/. 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, 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 typology?
Akashic places Hamilton County, Indiana in the "Realigning Affluent Suburb" typology — College-educated, affluent suburbs — the one bloc moving toward the Democratic Party. 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 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 typology — "Realigning Affluent Suburb" — captures where that record, its demographics, and its recent swing place it among American communities.