Marion County, Indiana: Diversifying Metro county. In 2024, voted D+27%. Republican peak: R+34 in 1972.
Key facts
- 2024 presidential margin
- D+27MIT Election Lab
- Political typology
- Diversifying MetroAkashic typology
- Population
- 975,8092024 5-year
- Median household income
- $66,3462024 5-year
- White (non-Hispanic)
- 51.9%2024 5-year
- Black
- 27.4%2024 5-year
- Hispanic / Latino
- 13.8%2024 5-year
- Peak Democratic margin
- D+29 in 2020MIT Election Lab
- Peak Republican margin
- R+34 in 1972MIT Election Lab
- Most similar
- Charles County, MD · similarity 0.99
2024 results by precinct
2024 precinct map of Marion CountyPrecinct-level 2024 presidential results for Marion 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 | +2.1% |
| 1896 | −13.7% |
| 1900 | −10.4% |
| 1904 | −21.3% |
| 1908 | −0.4% |
| 1912 | +26.0% |
| 1916 | −7.2% |
| 1920 | −12.7% |
| 1924 | −22.2% |
| 1928 | −19.7% |
| 1932 | +4.0% |
| 1936 | +17.2% |
| 1940 | −1.2% |
| 1944 | −4.5% |
| 1948 | −2.8% |
| 1952 | −21.4% |
| 1956 | −24.2% |
| 1960 | −15.6% |
| 1964 | +3.2% |
| 1968 | −15.0% |
| 1972 | −33.5% |
| 1976 | −10.0% |
| 1980 | −13.5% |
| 1984 | −17.2% |
| 1988 | −17.7% |
| 1992 | −5.9% |
| 1996 | −3.1% |
| 2000 | −1.3% |
| 2004 | +1.9% |
| 2008 | +28.4% |
| 2012 | +22.2% |
| 2016 | +22.5% |
| 2020 | +29.2% |
| 2024 | +27.5% |
DemocraticRepublican
38 presidential elections
| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| D | 221,719 | 124,327 | 354,368 | ||
| D | 247,772 | 134,175 | 389,619 | ||
| D | 212,676 | 130,228 | 366,524 | ||
| D | 216,336 | 136,509 | 359,972 | ||
| D | 241,987 | 134,313 | 379,362 | ||
| D | 162,249 | 156,072 | 320,838 | ||
| R | 134,189 | 137,810 | 279,903 | ||
| R | 124,448 | 133,329 | 282,214 | ||
| R | 122,234 | 141,369 | 323,790 | ||
| R | 128,627 | 184,519 | 315,095 | ||
| R | 130,185 | 184,880 | 317,148 | ||
| R | 126,103 | 168,680 | 314,269 | ||
| R | 145,274 | 177,767 | 325,576 | ||
| R | 102,166 | 206,065 | 309,766 | ||
| R | 115,715 | 162,503 | 310,922 | ||
| D | 152,418 | 143,015 | 296,381 | ||
| R | 121,336 | 166,202 | 288,206 | ||
| R | 99,102 | 162,566 | 262,347 | ||
| R | 106,387 | 164,466 | 271,939 | ||
| R | 97,915 | 103,603 | 204,013 | ||
| R | 106,382 | 116,421 | 223,837 | ||
| R | 121,907 | 124,845 | 247,539 | ||
| D | 124,961 | 87,798 | 216,550 | ||
| D | 106,661 | 98,256 | 212,664 | ||
| R | 73,309 | 109,630 | 184,100 | ||
| R | 59,498 | 95,135 | 160,880 | ||
| R | 61,460 | 79,957 | 145,571 | ||
| R | 35,043 | 40,699 | 79,030 | ||
| D | 29,805 | 12,280 | 67,408 | ||
| R | 34,078 | 34,351 | 70,580 | ||
| R | 22,336 | 35,103 | 59,963 | ||
| R | 23,660 | 29,272 | 53,966 | ||
| R | 20,654 | 27,353 | 48,860 | ||
| D | 20,426 | 19,551 | 40,926 | ||
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Demographics
2024 ACS
Race, ethnicity, and ancestry
Click any group to see the ancestries typically reported within it.
German
13.3%
English
8.5%
Irish
8.0%
American
4.3%
Italian
1.9%
Scottish
1.6%
Polish
1.3%
African American
21.9%
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: 34.4 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
$66,346
Marion County ranks near the middle of US counties.
Marion County$66,346
Indiana$71,957
United States$80,734
Marion 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
15.3%
Children face moderate poverty.
Children under 1821.5%
Working age (18–64)13.5%
Seniors (65+)10.8%
Source · American Community Survey 5-year estimates, 2024 release.
2024 ACS
Language at home
Population aged 5 and older
81.8%
speak English only
Spanish10.8%
Other Indo-European2.9%
Asian & Pacific Islander2.5%
Other languages2.1%
Source · ACS 5-year estimates, 2024.
2020 religion census
Religious adherents
Adherents per capita by tradition
Source · 2020 US Religion Census. Remaining 49.4% of residents not counted as adherents by any reporting body.
Marion County, anchoring Indiana's capital and largest city, voted Democratic by 27.6 points in 2024—one of the widest margins in the state and a product of Indianapolis's rapid urban densification and growing college-educated workforce.
The Democratic margin here reached twenty-nine points in 2020. Between 2020 and 2024 the county moved two points toward the Republican candidate; the 2024 margin was twenty-seven points.
A population of 975,809, a 52% non-Hispanic-white share, and a median household income of $66,346 describe the county. The county's voting pattern over the last decade is most similar to that of Charles County and Mecklenburg 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.
Marion County, Indiana. Akashic. https://akashic.app/county/18097/. Accessed May 20, 2026. License: CC BY 4.0.
License: CC BY 4.0
More diversifying metro counties
Frequently asked questions
How did Marion County, Indiana vote in 2024?
In 2024, Marion County, Indiana voted Democratic by 27.5 points (D+27), carried by the Democratic candidate. Out of 354,368 votes cast, 221,719 went Democratic and 124,327 went Republican.
What is Marion County, Indiana's political typology?
Akashic places Marion County, Indiana in the "Diversifying Metro" typology — Mid-size metropolitan counties growing more diverse and trending Democratic. 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 23 times, and other 0 times.
When did Marion County, Indiana last vote Republican?
The most recent presidential election in which Marion County, Indiana voted Republican was 2000.
How many people live in Marion County, Indiana?
Marion County, Indiana has a population of 975,809 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Marion County, Indiana?
Median household income in Marion County, Indiana is $66,346 — below the national median of $80,734. The Indiana state median is $71,957.
What is the political history of Marion County, Indiana?
Akashic tracks 38 presidential elections in Marion County, Indiana from 1876 to 2024. Of those, 11 went Democratic and 23 went Republican. The county's typology — "Diversifying Metro" — captures where that record, its demographics, and its recent swing place it among American communities.