DeKalb County, Illinois Population 2023

98,998

DeKalb County, Illinois's estimated 2023 population is 98,998 with a growth rate of -0.48% in the past year according to the most recent United States census data. DeKalb County, Illinois is the 20th largest county in Illinois. The 2010 population was 105,160 and has seen a growth of -5.86% since that time.

Note: data after 2021 is projected based on recent change

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Year
Population
Growth
Growth Rate
2010105,160
2011104,686-474-0.45%
2012104,212-474-0.45%
2013103,738-474-0.45%
2014103,264-474-0.46%
2015102,790-474-0.46%
2016102,316-474-0.46%
2017101,842-474-0.46%
2018101,368-474-0.47%
2019100,894-474-0.47%
2020100,420-474-0.47%
202199,946-474-0.47%
202299,472-474-0.47%
202398,998-474-0.48%
showing: 14 rows
2023 Growth Rate
-0.48% (-474)
County Website
DeKalb County
Founded
March 4, 1837
County Seat
Sycamore
2010 Population
105,160
Growth Since 2010
-5.86% (-6,162)

DeKalb County, Illinois Population 2023

Population by Race

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Race
Population
Percentage (of total)
White81,82681.08%
Black or African American7,9647.89%
Two or more races4,7364.69%
Other race3,8593.82%
Asian2,3112.29%
Native American2000.2%
Native Hawaiian or Pacific Islander260.03%
showing: 7 rows

White

Black or African American

Two or more races

Other race

Asian

Native American

Native Hawaiian or Pacific Islander

DeKalb County, Illinois Population by Race

DeKalb County, Illinois Population Pyramid 2023

DeKalb County, Illinois Median Age

31.4

Total

30.7

Male

32.3

Female

DeKalb County, Illinois Adults

There are 79,037 adults, (12,762 of whom are seniors) in DeKalb County, Illinois.

DeKalb County, Illinois Age Dependency

52.3

Age Dependency Ratio

19.3

Old Age Dependency Ratio

33

Child Dependency Ratio

DeKalb County, Illinois Sex Ratio

Female50,85550.39%
Male50,06749.61%

DeKalb County, Illinois Population by Age

DeKalb County, Illinois Renter vs Owner Occupied by Household Type

Household Type
Count
Average Size
Owner
Renter
All38,9312.4857.842.2
Married17,0863.1983.616.4
Non Family15,7821.436.263.8
Female4,6293.2237.862.2
Male1,4343.5751.348.7
showing: 5 rows

3.12

Average Family Size

2.48

Average Household Size

57.8%

Rate of Home Ownership

Married

Male

Female

NonFamily

owner

renter

DeKalb County, Illinois Households and Families

Male

Female

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Less Than 9th Grade

9th to 12th Grade

High School Graduate

Some College

Associates Degree

Bachelors Degree

Graduate Degree

DeKalb County, Illinois Educational Attainment by Sex (over 25)

DeKalb County, Illinois Educational Attainment by Race

High School Graduation Rate

Bachelors Rate

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The highest rate of high school graduation is among white people with a rate of 73.14%.

The highest rate of bachelors degrees is among asian people with a rate of 41.76%.

DeKalb County, Illinois Educational Attainment by Race

All

Male

Female

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$43,664

Average Earnings

$53,614

Average Male

$34,348

Average Female

DeKalb County, Illinois Earnings by Educational Attainment

DeKalb County, Illinois Language by Age

Only English

Spanish

Other Indo-European Languages

Asian and Pacific Island Languages

Other Languages

DeKalb County, Illinois Language

87.46% of DeKalb County, Illinois residents speak only English, while 12.54% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 7.96% of the population.

DeKalb County, Illinois Language

DeKalb County, Illinois Poverty by Race

rate

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Name
Total
In Poverty
Poverty Rate
White73,7459,05312.28%
Black6,8272,69939.53%
Hispanic11,3522,03517.93%
Asian2,1201,05049.53%
Other3,73981921.9%
Multiple4,47768015.19%
Native2009246%
showing: 7 rows

15.63%

Overall Poverty Rate

14.65%

Male Poverty Rate

16.59%

Female Poverty Rate

Poverty in DeKalb County, Illinois

The race most likely to be in poverty in DeKalb County, Illinois is Asian, with 49.53% below the poverty level.

The race least likely to be in poverty in DeKalb County, Illinois is White, with 12.28% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 2.55%. Among those working part-time, it was 23.1%, and for those that did not work, the poverty rate was 23.72%.

DeKalb County, Illinois Poverty

rate

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Rate
Poverty
Less Than 9th Grade15.99%
High School12.55%
Some College10.04%
Bachelors or Greater6.05%
showing: 4 rows

DeKalb County, Illinois Poverty Rate by Education

rate

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Rate
Poverty
Female Unemployed42.48%
Male Unemployed30.22%
Female Employed11.87%
Male Employed7%
showing: 4 rows

DeKalb County, Illinois Poverty Rate by Employment Status and Sex

DeKalb County, Illinois Income by Household Type

Households

Families

MarriedFamilies

NonFamilies

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mean

median

Income by Household Type

DeKalb County, Illinois Marital Status

Married

Widowed

Divorced

Separated

NeverMarried

Marriage Rates

42.5%

Overall Marriage Rate

43.9%

Male Marriage Rate

41.2%

Female Marriage Rate

DeKalb County, Illinois Married by Age and Sex

male

female

DeKalb County, Illinois Marriage

The age group where males are most likely to be married is Over 65, while the female age group most likely to be married is 55-64.

DeKalb County, Illinois Marital Status by Race

Married

Widowed

Divorced

Separated

NeverMarried

DeKalb County, Illinois Marital Status

Second Gulf War

First Gulf War

Vietnam

Korea

World War II

4,657

Number of Veterans

4,161

Male Veterans

496

Female Veterans

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DeKalb County, Illinois Veterans by War

count

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DeKalb County, Illinois Veterans by Age

count

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DeKalb County, Illinois Veterans by Race

DeKalb County, Illinois Veterans by Education

Less Than 9th Grade

High School Graduate

Some College

Bachelors or Greater

4.37%

Veteran Poverty Rate

24.28%

Veteran Disability Rate

DeKalb County, Illinois Veterans by Education

LaborForceParticipation

68.8%

Labor Force Participation

63.6%

Employment Rate

7.4%

Unemployment Rate

DeKalb County, Illinois Employment by Age

LaborForceParticipation

DeKalb County, Illinois Employment by Race

LaborForceParticipation

DeKalb County, Illinois Employment by Education

Origin of Non-Citizens

Europe

Asia

Africa

Oceania

Latin America

North America

Non citizens include legal permanent residents (green card holders), international students, temporary workers, humanitarian migrants, and illegal immigrants.

Origin of Naturalized Citizens

Europe

Asia

Africa

Oceania

Latin America

North America

79.69%

Born in DeKalb County, Illinois

97.05%

Native Born

7.4%

Foreign Born

4.47%

Non Citizen

2.93%

Naturalized

Place of Birth

97.05% of DeKalb County, Illinois residents were born in the United States, with 79.69% having been born in Illinois. 4.47% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Latin America.

DeKalb County, Illinois Place of Birth

Sources