DeKalb County, Illinois

DeKalb County: County in Illinois, United States

About

DeKalb County is a county located in the U.S. state of Illinois. As of the 2010 census, the population was 105,160 and a population density of 64 people per km². After 10 years in 2020 county had an estimated population of 104,491 inhabitants. Its county seat is Sycamore. The county was created 187 years ago in 1837.

DeKalb County locator map
Location of DeKalb County on Illinois map.

Quick Facts about DeKalb County

Population : 104,491 (2020)
Country : United States of America
State : Illinois (United States)
Different from : DeKalb County, DeKalb County, DeKalb County, DeKalb County, DeKalb County
Area : 1645 km2
Water as percent of area : 0.5%
Land as percent of area : 99.5%
Named for : Johann de Kalb
Capital : Sycamore
Establishment : March 03, 1837
Time Zone : America/Chicago
Local time : 09:38:16 (30th December 2024)
Density : 64 Pop. per km² as of 2020
Population growth : -0.64% (2010-2020)
Sycamore Dek cty gov leg center image
Sycamore Dek cty gov leg center
Sycamore Dek cty gov leg center image
Sycamore Dek cty gov leg center image

Geography

DeKalb County is located at 41°53'37"N 88°46'13"W (41.8935300, -88.7703100). It has 6 neighbors: Boone County, La Salle County, Lee County, McHenry County, Ogle County and Winnebago County.

DeKalb County map

Click "full screen" full screen map icon to open full mode. View satellite images

The largest city of DeKalb County is DeKalb with a population of 42,621. Other cities include, Sycamore population 18,317, Genoa population 5,251, Hinckley population 2,042 and Somonauk population 1,860. See all DeKalb County cities & populated places.

DeKalb County Populated Places

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

City Name Population Title
DeKalb 42,621 The county seat of DeKalb County, Illinois.
Sycamore 18,317 City in Illinois
Sandwich 7,384 Town in DeKalb, Kendall, and LaSalle counties, Illinois, United States
Genoa 5,251 City in DeKalb County, Illinois, United States
Cortland 4,393 Township in DeKalb County, Illinois
Hinckley 2,042 Illinois
Somonauk 1,860 City in Illinois, United States of America
Kirkland 1,717 Village in DeKalb County, Illinois, United States
Waterman 1,497 Human settlement in Illinois, United States of America
Malta 1,161 Village in Illinois, US
Shabbona 913 Township in DeKalb County, Illinois

DeKalb County has 6 neighbours.

Demographics

According to census records, the population of DeKalb County decreased by 0.64% in 10 years.

Year Population % Change Method
2010 105,160 - census
2011 104,450 -0.68% estimation process
2012 104,365 -0.08% estimation process
2013 104,202 -0.16% estimation process
2014 104,560 0.34% estimation process
2015 104,195 -0.35% estimation process
2016 104,080 -0.11% estimation process
2017 104,309 0.22% estimation process
2018 104,349 0.04% estimation process
2019 104,897 0.52% estimation process
2020 104,491 -0.39% estimation process

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People born in DeKalb County (2)

People born in DeKalb County, including baseball player Ernie Burch, Maria Straub Temperance movement and hymnal songwriter. 1838-1898 Born in Butler Township, De Kalb County, Indiana Needs Vote Maria Straub, .

List

Other places with the same name (6)

Illinois Other Counties (more counties)

County Name Population Title
Cook County 5,108,284 County in Illinois, United States
Chicago 2,677,643 The third most populous city in the United States and the center of the Chicago metropolitan area.
DuPage County 917,481 County in Illinois, United States
Lake County 693,593 County in Oregon, United States
Will County 688,726 County in Illinois, United States
Kane County 531,010 County in southern Utah, United States
McHenry County 305,888 County in Illinois, United States
Winnebago County 281,295 County in Illinois, United States
Madison County 262,635 County in Montana, United States
Saint Clair County 258,046 The County of St.
Champaign County 209,192 County in Illinois, United States
Aurora 196,383 The second most populous city in Illinois.
Sangamon County 193,882 County in Illinois, United States
Peoria County 177,652 County in Illinois, United States of America
McLean County 171,256 County in North Dakota, United States
Naperville 147,986 The second most populous city in Illinois.