Demographics of Marion County, Indiana

Marion County, Indiana had 992,196 people on July 1, 2025, by the Census Bureau’s estimate: +15,488 since July 2020. Age, income, poverty, housing and origin below come from the American Community Survey, averaged over 2020–2024, each with its margin of error.

Marion County, in four figures

992,196
Population: July 1, 2025, Vintage 2025 estimate.; +1.6%
Change since July 2020: +15,488 people.; 34.4 ±0.1
Median age: ACS 2020–⁠2024.; $66,346 ±$943
Median household income: ACS 2020–⁠2024, in 2024 dollars.

Population, year by year

July 1 estimates from the Census Bureau’s Vintage 2025. Each year's change is births less deaths, net moves from abroad and net moves from elsewhere in the country, with the Bureau's small residual. The 2020 row's components run 3 months, from the April census to July 1.

Marion County, Indiana's population grew 1.6% from July 2020 to July 2025, against +3.1% nationally

The July 1 estimate of Marion County, Indiana's resident population and the nation's, each year of the Census Bureau's Vintage 2025, as a share of its July 2020 level (= 100).

U.S. Census Bureau — Census Bureau population estimates — counties and Puerto Rico municipios, with components of change

About this chart

The figures

Marion County, Indiana's population grew 1.6% from July 2020 to July 2025, against +3.1% nationally. The July 1 estimate of Marion County, Indiana's resident population and the nation's, each year of the Census Bureau's Vintage 2025, as a share of its July 2020 level (= 100).
July 1	Population	Index	United States
2020	976,708	100.0	100.0
2021	971,373	99.5	100.2
2022	974,293	99.8	100.7
2023	980,327	100.4	101.6
2024	990,213	101.4	102.5
2025	992,196	101.6	103.1

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Population of Marion County, Indiana on July 1 of each year, Vintage 2025
July 1	Population	Change	Births less deaths	From abroad	From elsewhere in the country
2020	976,708	−494	+402	+156	−1,344
2021	971,373	−5,335	+3,481	+1,835	−10,744
2022	974,293	+2,920	+4,027	+9,757	−10,610
2023	980,327	+6,034	+5,496	+12,215	−11,726
2024	990,213	+9,886	+5,899	+14,520	−10,542
2025	992,196	+1,983	+5,861	+6,817	−10,653

Age, 2020–2024

The median age is 34.4 ±0.1: for men 33.4 ±0.2 and for women 35.3 ±0.1. Shares are of everyone the survey counts, in the Bureau’s sex-by-age table (B01001).

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People in Marion County by age, ACS 2020–2024
Age	People	Share	Indiana	United States
Under 5	68,444 ±44	7.0% ±<0.1	6.0% ±<0.1	5.6% ±<0.1
5 to 17	175,471 ±2,963	18.0% ±0.3	17.3% ±0.1	16.3% ±<0.1
18 to 24	92,153 ±1,992	9.4% ±0.2	9.6% ±0.1	9.1% ±<0.1
25 to 44	293,250 ±2,505	30.1% ±0.3	25.8% ±0.1	26.9% ±<0.1
45 to 64	218,039 ±2,403	22.3% ±0.2	24.5% ±0.1	24.8% ±<0.1
65 and over	128,452 ±2,376	13.2% ±0.2	16.8% ±0.1	17.2% ±<0.1

Income and poverty, 2020–2024

Median household income is $66,346 ±$943, and income per person $37,704 ±$500, in 2024 dollars. The median is $71,957 ±$352 in Indiana and $80,734 ±$166 in the United States.

Households by income

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Households in Marion County by income, ACS 2020–2024
Household income	Households	Share	Indiana	United States
Under $25,000	67,360 ±2,707	16.8% ±0.7	15.0% ±0.2	14.6% ±<0.1
$25,000 to $49,999	81,897 ±2,752	20.5% ±0.7	19.4% ±0.2	16.7% ±<0.1
$50,000 to $74,999	76,402 ±2,753	19.1% ±0.7	17.7% ±0.2	15.5% ±<0.1
$75,000 to $99,999	50,767 ±1,794	12.7% ±0.4	13.9% ±0.2	12.6% ±<0.1
$100,000 to $149,999	62,967 ±2,148	15.7% ±0.5	17.5% ±0.2	17.5% ±<0.1
$150,000 to $199,999	30,808 ±1,513	7.7% ±0.4	8.3% ±0.1	9.6% ±<0.1
$200,000 or more	30,231 ±1,212	7.5% ±0.3	8.2% ±0.1	13.4% ±0.1

Poverty by age

The poverty rate is the share of people whose family income is below the federal threshold for their family’s size, of everyone for whom the Bureau determines it (B17020).

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Poverty rate in Marion County by age, ACS 2020–2024
Age	Below poverty	Rate	Indiana	United States
All ages	147,014 ±6,031	15.3% ±0.6	12.3% ±0.2	12.5% ±0.1
Under 18	51,596 ±2,683	21.5% ±1.1	16.0% ±0.3	16.1% ±0.1
18 to 59	72,659 ±3,247	13.5% ±0.6	11.9% ±0.2	11.6% ±0.1
60 and over	22,759 ±1,455	12.5% ±0.8	9.6% ±0.2	11.0% ±<0.1

Housing, 2020–2024

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Housing in Marion County, ACS 2020–2024
Measure	Marion County	Indiana	United States
Housing units	441,040 ±138	2,976,568 ±617	143,775,355 ±10,234
Occupied	90.8% ±0.4	91.2% ±0.2	89.9% ±0.1
Vacant	9.2% ±0.4	8.8% ±0.2	10.1% ±0.1
Owner occupied	56.5% ±0.7	70.6% ±0.3	65.2% ±0.3
Renter occupied	43.5% ±0.8	29.4% ±0.3	34.8% ±0.1
Median home value	$224,000 ±$2,242	$218,200 ±$739	$332,700 ±$236
Median gross rent	$1,153 ±$10	$1,062 ±$5	$1,413 ±$2
Median year built	1973 ±1	1976 ±1	1980 ±1

Occupied and vacant are shares of all housing units; owner and renter occupied are shares of occupied units. Value and rent are medians in 2024 dollars.

Origin and place of birth, 2020–2024

Hispanic or Latino origin is not a race in the Census Bureau’s tables. Here the people of Hispanic origin, of any race, are one row, and everyone else is counted by race alone (B03002), so the rows add to the whole.

Hispanic origin and race

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People in Marion County by Hispanic origin and race, ACS 2020–2024
Origin	People	Share	Indiana	United States
Hispanic or Latino	134,243 ±0	13.8% ±<0.1	8.6% ±<0.1	19.3% ±<0.1
White alone, not Hispanic	483,262 ±1,202	49.5% ±0.1	75.4% ±<0.1	57.4% ±<0.1
Black alone, not Hispanic	264,862 ±3,138	27.1% ±0.3	9.1% ±0.1	11.9% ±<0.1
Asian alone, not Hispanic	39,230 ±1,244	4.0% ±0.1	2.6% ±<0.1	5.9% ±<0.1
American Indian and Alaska Native alone, not Hispanic	509 ±141	0.1% ±<0.1	0.1% ±<0.1	0.5% ±<0.1
Native Hawaiian and Other Pacific Islander alone, not Hispanic	224 ±62	< 0.1% ±<0.1	< 0.1% ±<0.1	0.2% ±<0.1
Some other race alone, not Hispanic	5,838 ±1,049	0.6% ±0.1	0.4% ±<0.1	0.6% ±<0.1
Two or more races, not Hispanic	47,641 ±3,379	4.9% ±0.3	3.8% ±0.1	4.3% ±<0.1

Place of birth and citizenship

“Born a citizen outside the states” counts people born in Puerto Rico, the island areas, or abroad to American parents. Naturalized citizens and those who are not citizens together make up the people born abroad (B05002).

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People in Marion County by place of birth and citizenship, ACS 2020–2024
Born	People	Share	Indiana	United States
Born in the state	616,950 ±4,629	63.2% ±0.5	67.0% ±0.2	57.3% ±<0.1
Born in another state	224,662 ±4,661	23.0% ±0.5	25.8% ±0.2	26.9% ±<0.1
Born a citizen outside the states	11,333 ±1,391	1.2% ±0.1	0.8% ±<0.1	1.7% ±<0.1
Born abroad	122,864 ±3,847	12.6% ±0.4	6.3% ±0.1	14.1% ±<0.1
Naturalized citizens	39,702 ±2,082	4.1% ±0.2	2.6% ±0.1	7.4% ±<0.1
Not citizens	83,162 ±3,660	8.5% ±0.4	3.7% ±0.1	6.8% ±<0.1

Marion County among the counties of Indiana

1st of 92 by population, July 2025. Every one is listed on the Indiana page.

Counties of Indiana near Marion County in population, July 2025
County	July 2025	Change since 2020
Marion County	992,196	+1.6%
Lake County	504,612	+1.1%
Allen County	402,329	+4.2%
Hamilton County	387,036	+10.9%
St. Joseph County	272,861	+0.1%
Elkhart County	208,774	+0.9%

Elsewhere on the site

Sources

Census Bureau population estimates — counties and Puerto Rico municipios, with components of change — U.S. Census Bureau · U.S. Government work · retrieved September 25, 2026
American Community Survey 5-year estimates — table-based Summary File · U.S. Government work

Data retrieved September 25, 2026