Hamilton County, Indiana Population 2026

Updated April 2026 · US Census ACS 2023 5-Year Estimates · 4th-largest in Indiana

The population of Hamilton County, Indiana is 357,176 as of the 2023 American Community Survey, making it the 4th-largest county in Indiana. The median household income is $117,957, the median home value is $379,100, and the median age is 38.0.

The population of Hamilton County has grown 37.3% since 2010 (276,499 → 379,704), a +2.29% annualized rate.

Hamilton County within Indiana · Source: US Census TIGER/Line via us-atlas

357,176

Population

+2.29%

Annual growth

906

People / sq mi

$117,957

Median Income

$379,100

Median Home Value

Hamilton County covers 394 sq mi of land at 905.6 people per square mile.

About Hamilton County, IN

Hamilton County is a county in Indiana with a population of 357,176. It ranks #4 among counties in Indiana by population. The median age is 38.0, in line with the national median. The population is 49.2% male and 50.8% female.

The median household income in Hamilton County is $117,957, above the US median of $74,580. 2.8% of residents live below the federal poverty level. Home values sit at a median of $379,100, with monthly rent averaging $1,468. The homeownership rate of 76.3% is higher than the national rate of 64.8%.

Educational attainment in Hamilton County reflects 61.8% of adults 25 and older holding a bachelor's degree or higher, above the national average of 34.3%. Roughly 20.7% of workers primarily work from home, noticeably above the national work-from-home rate of 14.2%. The average commute is 25.8 minutes each way.

Hamilton County Population History (2010-2024)

The county of Hamilton County had a population of 276,499 in 2010 and 379,704 in 2024, a 37.3% growth over 14 years. The peak was 379,704 in 2024. Average annual growth rate: 2.29%.

379,704

Population (2024)

276,499

Population (2010)

379,704

Peak (2024)

2.29%

Avg Annual Growth

Year	Population	Change	Annual %	Source
2010	276,499	-	-	estimate
2011	283,405	+6,906	+2.50%	estimate
2012	289,821	+6,416	+2.26%	estimate
2013	296,970	+7,149	+2.47%	estimate
2014	302,921	+5,951	+2.00%	estimate
2015	308,623	+5,702	+1.88%	estimate
2016	316,221	+7,598	+2.46%	estimate
2017	323,225	+7,004	+2.21%	estimate
2018	330,635	+7,410	+2.29%	estimate
2019	337,955	+7,320	+2.21%	estimate
2020	349,031	+11,076	+3.28%	estimate
2021	357,691	+8,660	+2.48%	estimate
2022	366,264	+8,573	+2.40%	estimate
2023	372,588	+6,324	+1.73%	estimate
2024	379,704	+7,116	+1.91%	estimate

Race & Ethnicity

White	81.6%
Black or African American	4.2%
Asian	0.0%
Hispanic or Latino (any race)	0.7%
Two or More Races	0.0%

Age & Sex

38.0

Median Age

50.8%

Female

49.2%

Male

13.5%

Age 65+

Age Distribution

Under 5

6.0%

5–9

7.3%

10–14

7.7%

15–19

7.1%

20–24

5.6%

25–34

11.8%

35–44

15.1%

45–54

14.0%

55–59

6.3%

60–64

5.6%

65–74

8.3%

75–84

3.7%

85+

1.5%

Children (under 15): 21.0% · Seniors (65+): 13.5%

Income & Poverty

Median household income	$117,957+$47,906 vs state
Mean household income	$156,318
Per-capita income	$58,929
Poverty rate	2.8%-5.6% vs state
Unemployment rate	2.0%
Employment-to-population	69.2%

Top Industries by Employment

Professional & business services

24.7%

Finance & real estate

15.8%

Information

10.4%

Manufacturing

10.3%

Education & health care

7.7%

Construction

4.8%

Arts, entertainment & food

4.2%

Retail trade

3.8%

The largest employment sector in Hamilton County is professional & business services, accounting for 24.7% of workers.

How residents commute

0.0%

Drive alone

0.8%

Carpool

71.0%

Public transit

20.7%

Work from home

25.8 min

Avg commute

Housing

$379,100+$177,500 vs state

Median home value

$1,468

Median rent

76.3%

Homeownership rate

140,389

Total housing units

94.9%

Occupied

5.1%

Vacant

23.7%

Renter-occupied

Social & access

95.8%

With health insurance

98.3%

With broadband internet

31.7%

Foreign-born

4.9%

Veterans (18+)

7.8%

With a disability

88.5%

Speak language other than English at home

Education

97.3%

High School+

61.8%

Bachelor's+

Largest cities in Indiana

Indianapolis (882,043)Fort Wayne (266,235)Evansville (116,441)South Bend (102,866)Fishers (100,918)Carmel (100,501)Bloomington (78,791)Hammond (77,098)Noblesville (71,940)Lafayette (70,650)All Indiana cities →

Other counties in Indiana

Marion County (971,822)Lake County (498,990)Allen County (388,791)St. Joseph County (272,574)Elkhart County (206,868)Tippecanoe County (187,399)Vanderburgh County (179,908)Hendricks County (179,379)Porter County (174,150)Johnson County (163,983)All Indiana counties →

Part of Indiana

Indiana demographic profile All Indiana data →

Metro areas in Indiana

Chicago (9,359,555)Cincinnati (2,255,257)Indianapolis (2,106,327)Louisville/Jefferson County (1,361,847)Fort Wayne (451,440)South Bend (324,180)Evansville (269,721)Lafayette (225,019)All US metros →

County rankings

US Counties by Population Richest US Counties by Median Household Income Expensive US Counties by Home Value Educated US Counties Counties With Highest Poverty Rates Youngest US Counties by Median Age Oldest US Counties by Median Age Cheapest US Counties by Median Home Value Racially Diverse US Counties Counties With Largest Hispanic Population All rankings →

Frequently Asked Questions

Hamilton County, Indiana has a population of 357,176 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 4th-largest county in Indiana. Population density is 906 people per square mile.

The population of Hamilton County has grown 37.3% since 2010 (276,499 → 379,704), a +2.29% annualized rate.

The median household income in Hamilton County, Indiana is $117,957, with mean (average) household income of $156,318 and per-capita income of $58,929. 2.8% of residents live below the federal poverty level.

In Hamilton County, the largest racial and ethnic groups are White (81.6%), Black or African American (4.2%), Hispanic or Latino (0.7%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.

The median age in Hamilton County, Indiana is 38.0 years. Residents are 50.8% female and 49.2% male.

The median home value in Hamilton County is $379,100 and median monthly rent is $1,468. 76.3% of occupied housing units are owner-occupied. The county has 140,389 total housing units, 5.1% of which are vacant.

The largest employment sector in Hamilton County, Indiana is professional, scientific, and management services, employing 24.7% of workers. The unemployment rate is 2.0%.

Indianapolis is among the largest cities associated with Hamilton County, Indiana, with a population of 882,043.