What is the population of DeKalb County?

The population of DeKalb County, IN is 43,670.

Where is DeKalb County located?

DeKalb County, IN is located at latitude 41.3975800 and longitude -84.9990900. It is in United States.

What is the area of DeKalb County?

The area of DeKalb County, IN is 942 km².

What is the elevation of DeKalb County?

DeKalb County, IN has an elevation of 266 meters (873 feet) above sea level.

What time zone is DeKalb County in?

DeKalb County, IN is in the America/Indiana/Indianapolis time zone.

How has the population of DeKalb County changed?

The population of DeKalb County, IN has increased from 42,223 (2010) to 43,670 (2020), a change of 3.4%.

DeKalb County, Indiana

DeKalb County: county in Indiana, United States.

About

DeKalb County is a county located in the U.S. state of Indiana. As of the 2010 census, the population was 42,223 and a population density of 45 people per km². After 10 years in 2020 county had an estimated population of 43,670 inhabitants. Its county seat is Auburn. The county was created 189 years ago in 1836.

DeKalb County locator map — Location of DeKalb County on Indiana map.

County Snapshot

DeKalb County at a glance

DeKalb County currently has 2 quality-checked populated place pages linked on MapSof, making it easier to jump from the county overview into local city pages.

Browse county places

Mapped populated places

These counts use a stricter populated-place filter so the main lists stay focused on real city and town pages.

Indiana counties

Open related pages

Largest city

Auburn

Population 13,617

Quick Facts about DeKalb County

Population	43,670 (2020)
Country	United States of America
State	Indiana (United States)
Different from	DeKalb County, DeKalb County, DeKalb County, DeKalb County, DeKalb County
Area	942 km²
Water as percent of area	0.28%
Land as percent of area	99.72%
Latitude & Longitude	41.3976,-84.9991
Named for	Johann de Kalb
Capital	Auburn
Establishment	January 01, 1837
Time Zone	Eastern Time Zone
Local time	09:32:08 (23rd September 2026)
Density	46 Pop. per km² as of 2020
Population growth	3.43% (2010-2020)
Weather	54℉ Cloudy 7-days weather

Auburn-indiana-courthouse-night image

Geography

DeKalb County is located at 41°23'51"N 84°59'57"W (41.3975800, -84.9990900). It has 5 neighbors: Allen County, LaGrange County, Noble County, Steuben County and Defiance County.

DeKalb County map

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The largest city of DeKalb County is Auburn with a population of 13,617. Other cities include and Garrett population 6,429. See all DeKalb County cities & populated places.

DeKalb County Populated Places

Cities, towns, neighborhoods & other populated places in DeKalb County.

City Name	Population	Title
Auburn	13,617	City in DeKalb County, Indiana, United States
Garrett	6,429	City in DeKalb County, Indiana, United States of America

Weather

54°F

Cloudy

10 to 15 mph NE Overnight

Cloudy, with a low around 54. Northeast wind 10 to 15 mph, with gusts as high as 25 mph.

7-Day Forecast

DeKalb County has 5 neighbours.

Allen County county in Indiana, United States.
LaGrange County county in Indiana, United States.
Noble County county in Indiana, United States.
Steuben County county in Indiana, United States.
Defiance County county in Ohio, United States.

Auburn

Demographics

The population of DeKalb County increased by 3.43% in 10 years.

Year	Population	% Change	Method
2010	42,223	-	census
2011	42,494	0.64%	estimation process
2012	42,328	-0.39%	estimation process
2013	42,369	0.1%	estimation process
2014	42,428	0.14%	estimation process
2015	42,496	0.16%	estimation process
2016	42,652	0.37%	estimation process
2017	42,806	0.36%	estimation process
2018	43,208	0.94%	estimation process
2019	43,475	0.62%	estimation process
2020	43,670	0.45%	estimation process

Comitatul DeKalb, Comte de DeKalb, Comté de DeKalb, Condado de DeKalb, Condado han DeKalb, Contea di DeKalb, De Kalb County, De-Kalb, DeKalb, DeKalb Kun, DeKalb Kūn, DeKalb konderria, DeKalb megye, Dekal'b, Dikalb, Hrabstwo DeKalb, Okrug Dekab, Quan DeKalb, Quận DeKalb, dekarubu jun, di ka er bu xian, dikalaba ka'unti, shhrstan dyklb ayndyana, Де-Калб, Декальб, Дикалб, Округ Декаб, Դե-Քալբ շրջան, شهرستان دیکلب، ایندیانا, ڈیکلب کاؤنٹی، انڈیانا, ডিকলাব কাউন্টি, デカルブ郡, 迪卡尔布县

People born in DeKalb County (1)

Clement A. Lounsberry was born in DeKalb County

Other places with the same name (5)

DeKalb County, Georgia county in Georgia, United States. with a population of 762,009 people.
DeKalb County, Illinois county in Illinois, United States. with a population of 104,491 people.
DeKalb County, Alabama county in Alabama, United States. with a population of 71,658 people.
DeKalb County, Tennessee county in Tennessee, United States. with a population of 20,837 people.
DeKalb County, Missouri county in Missouri, United States. with a population of 10,944 people.

Indiana Other Counties (more counties)

County Name	Population	Title
Marion County	966,183	County in Oregon, United States
Indianapolis	877,903	The sixteenth most populous city in the United States and the center of the Indianapolis metropolitan area.
Lake County	487,536	County in Indiana, United States
Allen County	382,187	County in Indiana, United States
Hamilton County	344,238	County in Indiana, United States
Fort Wayne	272,398	The second most populous city in Indiana and the center of the Fort Wayne metropolitan area.
Saint Joseph County	271,484	County in Indiana, United States
Elkhart County	206,161	County in Indiana, United States
Tippecanoe County	196,115	County in the northwest quadrant of Indiana, United States
Vanderburgh County	182,447	County in Indiana, United States
Hendricks County	173,251	County in Indiana, United States
Porter County	170,980	County in Indiana, United States
Johnson County	160,607	County in Indiana, United States
Monroe County	148,219	County in Indiana, United States
Madison County	129,681	County in Indiana, United States
Clark County	119,266	County in Indiana, United States