DeKalb County, Indiana Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 35th-largest in Indiana
The population of DeKalb County, Indiana is 43,584 as of the 2023 American Community Survey, making it the 35th-largest county in Indiana. The median household income is $70,080, the median home value is $177,900, and the median age is 38.4.
The population of DeKalb County has grown 4.7% since 2010 (42,335 → 44,330), a +0.33% annualized rate.
43,584
Population
+0.33%
Annual growth
120
People / sq mi
$70,080
Median Income
$177,900
Median Home Value
DeKalb County covers 363 sq mi of land at 120.1 people per square mile.
About DeKalb County, IN
DeKalb County is a county in Indiana with a population of 43,584. It ranks #35 among counties in Indiana by population. The median age is 38.4, in line with the national median. The population is 49.9% male and 50.1% female.
The median household income in DeKalb County is $70,080, below the US median of $74,580. 7.5% of residents live below the federal poverty level. Home values sit at a median of $177,900, with monthly rent averaging $828. The homeownership rate of 82.3% is higher than the national rate of 64.8%.
Educational attainment in DeKalb County reflects 20.1% of adults 25 and older holding a bachelor's degree or higher, below the national average of 34.3%. Roughly 4.4% of workers primarily work from home, below the national work-from-home rate of 14.2%. The average commute is 20.8 minutes each way.
DeKalb County Population History (2010-2024)
The county of DeKalb County had a population of 42,335 in 2010 and 44,330 in 2024, a 4.7% growth over 14 years. The peak was 44,330 in 2024. Average annual growth rate: 0.33%.
44,330
Population (2024)
42,335
Population (2010)
44,330
Peak (2024)
0.33%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 42,335 |
| 2011 | 42,500 |
| 2012 | 42,337 |
| 2013 | 42,378 |
| 2014 | 42,442 |
| 2015 | 42,511 |
| 2016 | 42,671 |
| 2017 | 42,830 |
| 2018 | 43,231 |
| 2019 | 43,561 |
| 2020 | 43,306 |
| 2021 | 43,417 |
| 2022 | 43,804 |
| 2023 | 44,177 |
| 2024 | 44,330 |
Race & Ethnicity
| White | 95.0% |
| Black or African American | 0.2% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 0.5% |
| Two or More Races | 0.0% |
Age & Sex
38.4
Median Age
50.1%
Female
49.9%
Male
17.0%
Age 65+
Age Distribution
Children (under 15): 19.8% · Seniors (65+): 17.0%
Income & Poverty
| Median household income | $70,080+$29 vs state |
| Mean household income | $85,064 |
| Per-capita income | $34,026 |
| Poverty rate | 7.5%-0.9% vs state |
| Unemployment rate | 2.7% |
| Employment-to-population | 63.1% |
Top Industries by Employment
The largest employment sector in DeKalb County is manufacturing, accounting for 34.2% of workers.
How residents commute
0.1%
Drive alone
1.0%
Carpool
82.8%
Public transit
4.4%
Work from home
20.8 min
Avg commute
Housing
$177,900$-23,700 vs state
Median home value
$828
Median rent
82.3%
Homeownership rate
18,280
Total housing units
93.0%
Occupied
7.0%
Vacant
17.7%
Renter-occupied
Social & access
93.2%
With health insurance
91.4%
With broadband internet
22.9%
Foreign-born
6.5%
Veterans (18+)
14.5%
With a disability
97.7%
Speak language other than English at home
Education
92.3%
High School+
20.1%
Bachelor's+
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Other counties in Indiana
Part of Indiana
Metro areas in Indiana
County rankings
Frequently Asked Questions
DeKalb County, Indiana has a population of 43,584 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 35th-largest county in Indiana. Population density is 120 people per square mile.
The population of DeKalb County has grown 4.7% since 2010 (42,335 → 44,330), a +0.33% annualized rate.
The median household income in DeKalb County, Indiana is $70,080, with mean (average) household income of $85,064 and per-capita income of $34,026. 7.5% of residents live below the federal poverty level.
In DeKalb County, the largest racial and ethnic groups are White (95.0%), Hispanic or Latino (0.5%), Black or African American (0.2%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in DeKalb County, Indiana is 38.4 years. Residents are 50.1% female and 49.9% male.
The median home value in DeKalb County is $177,900 and median monthly rent is $828. 82.3% of occupied housing units are owner-occupied. The county has 18,280 total housing units, 7.0% of which are vacant.
The largest employment sector in DeKalb County, Indiana is manufacturing, employing 34.2% of workers. The unemployment rate is 2.7%.
Indianapolis is among the largest cities associated with DeKalb County, Indiana, with a population of 882,043.
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Statewide data for Indiana
Population, race, income, age, and trends across Indiana
Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.