• county
  • FIPS 18033
  • Largest town: Auburn

DeKalb County, Indiana

DeKalb County had 44,330 residents in the Census Vintage 2024 estimate, on 362.8 square miles of land. It ranks 35th of 92 in Indiana by population and 68th by land area.

Population
44,330
#35 of 92 in Indiana · #1,107 in US
Area
362.8 sq mi
#68 of 92 in Indiana · #2,646 in US
Density
122 / sq mi
#31 of 92 in Indiana · #789 in US
Median household income
$68,933
#41 of 92 in Indiana · #1,074 in US

Census Vintage 2024 estimates · SAIPE 2023 income · 2024 Gazetteer land area

DeKalb County within Indiana. Pin: Indianapolis.

Measure from here

Tools and pages that start from DeKalb County

DeKalb County population, land area and income

DeKalb County had 44,330 residents in the Census Vintage 2024 estimate, on 362.8 square miles of land. It ranks 35th of 92 in Indiana by population and 68th by land area. That works out to 122.2 people per square mile, 1.3 times the US average of 96.3, and above the national county median.

The median county-equivalent in Indiana has 34,874 residents; DeKalb County is somewhat larger.

Its SAIPE 2023 median household income of $68,933 is above the national county median among 3,143 counties with an estimate.

National rank among 3,144

Population

44,330

3144th1st

1107th of 3,144 (US)

Land area

363 sq mi

3144th1st

2646th of 3,144 (US)

Density

122.2 / sq mi

3144th1st

789th of 3,144 (US)

Median household income

$68,933

3143rd1st

1074th of 3,143 (US)

Rank within Indiana (92)

Population

44,330

92nd1st

35th of 92 (IN)

Land area

363 sq mi

92nd1st

68th of 92 (IN)

Density

122.2 / sq mi

92nd1st

31st of 92 (IN)

Median household income

$68,933

92nd1st

41st of 92 (IN)

How DeKalb County's population changed since 2020

DeKalb County gained 1,024 residents between the July 2020 and July 2024 estimates, a rise of 2.4%. That ranks 17th of 92 in Indiana for growth. The median Indiana county changed by +0.8%, and the state as a whole by +2.0%.

Since the April 2020 estimates base, DeKalb County recorded 2,261 births and 2,044 deaths, a natural change of +217. Net international migration added +71 and net domestic migration, people moving to or from other US counties, came to +738. The largest single component was domestic migration, which added 738 people.

43.3k202043.4k202143.8k202244.2k202344.3k2024
Census Vintage 2024 county estimates for July 1 of each year. The axis starts above zero so year-to-year changes are visible.

Components of change, April 2020 to July 2024

Births
2,261
Deaths
2,044
Net international migration
+71
Net domestic migration
+738
Change, July 2023 to July 2024
+153

Where DeKalb County is

The Census internal point of DeKalb County is at 41.396800, -85.002700. It sits in UTM zone 16N. The map shades Indiana's 92 county-equivalents by population change from 2020 to 2024, darker for faster growth, with DeKalb County outlined. Dots are towns of 1,000+ people with residents in it.

Vigo County: +0.0%Fayette County: -0.1%Grant County: -0.1%Noble County: +0.7%Clay County: -0.0%Fulton County: -2.3%Henry County: +0.3%Jasper County: +1.5%Carroll County: +2.0%Huntington County: +0.8%Howard County: +0.6%Tipton County: -0.4%Starke County: +0.3%Lawrence County: +0.4%Jennings County: +0.2%Jay County: -1.5%Greene County: +1.3%Blackford County: -2.4%Madison County: +3.1%Parke County: +2.1%DeKalb County: +2.4%Scott County: +1.5%Benton County: +1.7%Wells County: +2.3%Wabash County: -0.5%Union County: -2.8%Marshall County: +0.8%Putnam County: +3.1%Clinton County: -0.8%Hamilton County: +8.8%Hancock County: +10.8%Jackson County: +2.0%Hendricks County: +8.5%Johnson County: +5.1%Decatur County: -0.2%Lake County: +0.8%Newton County: +2.5%Fountain County: +2.1%Crawford County: +0.0%Perry County: +0.9%Martin County: +0.6%Dearborn County: +1.3%Morgan County: +2.8%Monroe County: +0.0%Switzerland County: +2.5%Ohio County: +1.2%Sullivan County: -0.2%Franklin County: +1.5%Adams County: +2.0%Jefferson County: -0.5%Knox County: -1.1%Ripley County: +0.8%Vanderburgh County: +0.0%Gibson County: -0.1%LaGrange County: +1.5%Dubois County: -0.0%Harrison County: +0.8%Randolph County: -0.3%Brown County: +1.1%Shelby County: +1.3%Tippecanoe County: +2.8%Daviess County: +2.2%Delaware County: +1.1%Elkhart County: +0.2%Whitley County: +1.6%Allen County: +3.4%Montgomery County: +1.8%Miami County: -0.8%St. Joseph County: +0.4%Kosciusko County: +0.6%Floyd County: +1.8%Rush County: -0.1%Wayne County: -0.2%Posey County: -0.5%Clark County: +5.0%Orange County: -0.1%Marion County: +0.5%Boone County: +10.7%Porter County: +1.5%Steuben County: +1.2%Vermillion County: +0.8%Cass County: -0.6%Owen County: +2.5%White County: +0.6%Washington County: +0.4%Pulaski County: -0.8%Pike County: -1.1%Warren County: +0.3%Warrick County: +3.7%Spencer County: +1.8%LaPorte County: -0.8%Bartholomew County: +3.1%
Change 2020 to 2024
  1. < -0.2%
  2. < +0.4%
  3. < +1.2%
  4. < +2.1%
  5. ≥ +2.1%
no data

Orange pin: DeKalb County internal point. Dark pin: Indianapolis.

Internal point

Decimal
41.396800, -85.002700
DMS
41°23'48.48"N 85°00'9.72"W
UTM
16N 666968.9E 4584732.0N
Geohash
dp7e98ncv
Plus code
86HP9XWW+PW

Towns in DeKalb County

6 incorporated places of 1,000+ people have residents in DeKalb County, 26,395 people together, or 60% of the county. Each figure counts only the part of the town inside DeKalb County; towns marked "part" extend into another county. The largest is Auburn with 13,989.

  1. 01Auburn13,989
  2. 02Garrett6,663
  3. 03Butler2,669
  4. 04Waterloo2,157
  5. 05Ashley (part)679
  6. 06Hamilton (part)238
Census Vintage 2024 subcounty estimates, county parts of incorporated places (SUMLEV 157).

Counties bordering DeKalb County

The Census 2024 county adjacency file lists 6 neighbors for DeKalb County, including 2 across a state line. The most populous is Allen County, IN, with 399,295 residents. Distances run between Census internal points in a straight line.

Distance to Indianapolis and the nearest big city

Indianapolis is 127.8 miles SSW of DeKalb County's internal point in a straight line. The nearest place of 100,000 or more is Fort Wayne, IN (population 273,203), 22.6 miles away. The nearest place of 10,000 or more is Auburn, IN (population 13,989), 3.4 miles away.

DeKalb County FIPS code

The FIPS code of DeKalb County is 18033: state code 18 for Indiana plus county code 033. Use it as text, with the leading zero, when joining Census, BLS, or CDC county tables. SAIPE lists its 2023 median household income as $68,933.

Questions people ask

What is the population of DeKalb County, Indiana?

The Census Vintage 2024 estimate for July 1, 2024 is 44,330. That is up 1,024 people (2.4%) from the July 2020 estimate of 43,306.

What is the FIPS code of DeKalb County?

18033. The first two digits (18) are Indiana; the last three (033) identify the county.

What is the largest town in DeKalb County?

Auburn, with 13,989 residents inside DeKalb County in 2024.

Which counties border DeKalb County?

6 county-equivalents border it in the Census 2024 adjacency file: Allen County, IN; Noble County, IN; LaGrange County, IN; Defiance County, OH; Williams County, OH; Steuben County, IN.

Sources and data as of

Data as of: Census Vintage 2024 population estimates, 2024 Gazetteer land area and internal points, SAIPE 2023 median household income.

  1. 01Census Vintage 2024 county population estimates
  2. 02Census 2024 Gazetteer, counties
  3. 03Census SAIPE 2023 state and county estimates
  4. 04Census Vintage 2024 subcounty population estimates
  5. 05Census 2024 county adjacency file
  6. 06Census 2024 cartographic boundary file, counties (1:5,000,000)

How every number is computed: methodology. Spotted a wrong figure? Report an error.