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
Homeownership is the standout figure in DeKalb County: 82.3% of homes are owner-occupied, higher than the national rate. With 43,584 residents, DeKalb County is a county in Indiana. It ranks #35 among counties in Indiana by population.
The typical household here earns about $70,080, below the US median of $78,538. The poverty rate is 7.5%, below the national 12.4%. Median home value is $177,900, with typical rent around $828.
Degree attainment is mid-range for US counties: 20.1% of adults hold a four-year degree, below the national 35.0%. Just 4.4% of workers are home-based, below the national 14.0%, and the average commute runs about 21 minutes each way.
The ownership rate anchors the housing story in DeKalb County, and tends to move with the age structure and home-value figures above.
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+
Largest cities in Indiana
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.
DeKalb County, IN Climate
DeKalb County, IN has an average annual temperature of 9.3°C (49°F) and receives about 898 mm of precipitation per year. The warmest month is July and the coldest is January. Figures are 1970–2000 climate normals.
9.3°C
Avg Temp
898
Precip (mm/yr)
Jul
Hottest Month
Jan
Coldest Month
| Month | Avg (°C/°F) | Precip |
|---|---|---|
| January | -5° / 22° | 44 mm |
| February | -3° / 26° | 42 mm |
| March | 2° / 36° | 67 mm |
| April | 9° / 48° | 84 mm |
| May | 15° / 59° | 96 mm |
| June | 20° / 69° | 98 mm |
| July | 22° / 72° | 93 mm |
| August | 21° / 70° | 85 mm |
| September | 17° / 63° | 82 mm |
| October | 11° / 51° | 63 mm |
| November | 4° / 40° | 75 mm |
| December | -2° / 28° | 69 mm |
1970–2000 normals from WorldClim 2.1 (~9 km grid). Precipitation can be less precise near mountains or coastlines, where rainfall varies sharply over short distances.
Best time to visit DeKalb County, IN
The most comfortable months to visit DeKalb County, IN are typically August, June and July, when temperatures are mildest and rainfall is relatively low. The hottest month is July (around 29°C high). The coldest is January (near -10°C low). June is usually the wettest month.
Where to stay near DeKalb County
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Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.