Decatur County, Indiana Population 2026

Updated April 2026 · US Census ACS 2023 5-Year Estimates · 60th-largest in Indiana

The population of Decatur County, Indiana is 26,411 as of the 2023 American Community Survey, making it the 60th-largest county in Indiana. The median household income is $74,228, the median home value is $189,900, and the median age is 40.4.

The population of Decatur County has grown 2.4% since 2010 (25,795 → 26,421), a +0.17% annualized rate.

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

26,411

Population

+0.17%

Annual growth

People / sq mi

$74,228

Median Income

$189,900

Median Home Value

Decatur County covers 373 sq mi of land at 70.9 people per square mile.

About Decatur County, IN

Decatur County is distinguished by its share of foreign-born residents, 14.3% of the population. With 26,411 residents, Decatur County is a county in Indiana.

Median household income is $74,228, below the US median of $78,538. The poverty rate, 6.3%, is on the lower side for US counties and below the national 12.4%. Homes carry a median value of $189,900, with typical rent around $828.

Roughly 20.1% of adults have a bachelor’s, below the national 35.0%. Remote work is below the national 14.0% at 9.0%, and the average commute runs about 22 minutes each way.

Decatur County Population History (2010-2024)

The county of Decatur County had a population of 25,795 in 2010 and 26,421 in 2024, a 2.4% growth over 14 years. The peak was 26,685 in 2018. Average annual growth rate: 0.17%.

Decatur County population, 2010–2024 · Source: U.S. Census Bureau — decennial census & Population Estimates

26,421

Population (2024)

25,795

Population (2010)

26,685

Peak (2018)

0.17%

Avg Annual Growth

Year	Population	Change	Annual %	Source
2010	25,795	-	-	estimate
2011	25,900	+105	+0.41%	estimate
2012	26,041	+141	+0.54%	estimate
2013	26,232	+191	+0.73%	estimate
2014	26,411	+179	+0.68%	estimate
2015	26,338	-73	-0.28%	estimate
2016	26,569	+231	+0.88%	estimate
2017	26,627	+58	+0.22%	estimate
2018	26,685	+58	+0.22%	estimate
2019	26,472	-213	-0.80%	estimate
2020	26,476	+4	+0.02%	estimate
2021	26,360	-116	-0.44%	estimate
2022	26,458	+98	+0.37%	estimate
2023	26,395	-63	-0.24%	estimate
2024	26,421	+26	+0.10%	estimate

Race & Ethnicity

White	93.7%
Black or African American	0.3%
Asian	0.0%
Hispanic or Latino (any race)	2.8%
Two or More Races	0.0%

Age & Sex

40.4

Median Age

50.0%

Female

50.0%

Male

17.7%

Age 65+

Age Distribution

Under 5

6.5%

5–9

6.4%

10–14

6.7%

15–19

6.2%

20–24

5.9%

25–34

12.2%

35–44

12.1%

45–54

12.7%

55–59

7.4%

60–64

6.3%

65–74

10.3%

75–84

5.3%

85+

2.1%

Children (under 15): 19.6% · Seniors (65+): 17.7%

Income & Poverty

Median household income	$74,228+$4,177 vs state
Mean household income	$92,391
Per-capita income	$36,726
Poverty rate	6.3%-2.1% vs state
Unemployment rate	1.7%
Employment-to-population	64.6%

Top Industries by Employment

Manufacturing

30.8%

Professional & business services

19.4%

Education & health care

6.5%

Finance & real estate

5.9%

Retail trade

5.1%

Construction

5.1%

Information

4.9%

Arts, entertainment & food

4.2%

The largest employment sector in Decatur County is manufacturing, accounting for 30.8% of workers.

How residents commute

0.0%

Drive alone

2.8%

Carpool

79.6%

Public transit

9.0%

Work from home

22.0 min

Avg commute

Housing

$189,900$-11,700 vs state

Median home value

$828

Median rent

75.2%

Homeownership rate

11,619

Total housing units

90.5%

Occupied

9.5%

Vacant

24.8%

Renter-occupied

Social & access

96.0%

With health insurance

92.8%

With broadband internet

14.3%

Foreign-born

6.7%

Veterans (18+)

12.2%

With a disability

97.7%

Speak language other than English at home

Education

90.5%

High School+

20.1%

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)Hamilton County (357,176)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)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

Decatur County, Indiana has a population of 26,411 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 60th-largest county in Indiana. Population density is 71 people per square mile.

The population of Decatur County has grown 2.4% since 2010 (25,795 → 26,421), a +0.17% annualized rate.

The median household income in Decatur County, Indiana is $74,228, with mean (average) household income of $92,391 and per-capita income of $36,726. 6.3% of residents live below the federal poverty level.

In Decatur County, the largest racial and ethnic groups are White (93.7%), Hispanic or Latino (2.8%), Black or African American (0.3%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.

The median age in Decatur County, Indiana is 40.4 years. Residents are 50.0% female and 50.0% male.

The median home value in Decatur County is $189,900 and median monthly rent is $828. 75.2% of occupied housing units are owner-occupied. The county has 11,619 total housing units, 9.5% of which are vacant.

The largest employment sector in Decatur County, Indiana is manufacturing, employing 30.8% of workers. The unemployment rate is 1.7%.

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