DeKalb County, Illinois Population 2024

100,353

DeKalb County, Illinois's estimated 2024 population is 100,353 with a growth rate of 0.06% in the past year according to the most recent United States census data. DeKalb County, Illinois is the 19th largest county in Illinois. The 2010 population was 105,151 and has seen a growth of -4.56% since that time.

Note: data after 2022 is projected based on recent change

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Year
Population
Growth
Growth Rate
2029100,678650.06%
2028100,613650.06%
2027100,548650.06%
2026100,483650.06%
2025100,418650.06%
2024100,353650.06%
2023100,288650.06%
2022100,223-259-0.26%
2021100,4822130.21%
2020100,269-4,862-4.62%
2019105,1315440.52%
2018104,587740.07%
2017104,5132940.28%
2016104,219-19-0.02%
2015104,238-355-0.34%
2014104,5933670.35%
2013104,226-159-0.15%
2012104,385-81-0.08%
2011104,466-685-0.65%
2010105,15100%
199077,9323,3084.43%
198074,6242,9704.14%
197071,65419,94038.56%
196051,71410,93326.81%
195040,7816,39318.59%
194034,3881,7445.34%
193032,6441,3054.16%
192031,339-2,118-6.33%
191033,4571,7015.36%
190031,7564,69017.33%
189027,0662981.11%
188026,7683,50315.06%
187023,2654,17921.9%
186019,08611,546153.13%
18507,5405,843344.31%
18401,697-98,981-98.31%
showing: 36 rows
2024 Growth Rate
0.06% (65)
County Website
DeKalb County
County Seat
2020 Population
100,269
Area
631 mi²
Density
159 people/mi²
Growth Since 2020
0.08% (84)
Founded
March 4, 1837

DeKalb County, Illinois Population 2024

Population by Race

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Race
Population
Percentage (of total)
White79,77279.23%
Black or African American7,7347.68%
Two or more races6,5566.51%
Other race3,7573.73%
Asian2,4242.41%
Native American4180.42%
Native Hawaiian or Pacific Islander250.02%

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 2024

DeKalb County, Illinois Median Age

31.8

Total

31

Male

32.7

Female

DeKalb County, Illinois Adults

There are 79,055 adults, (13,559 of whom are seniors) in DeKalb County, Illinois.

DeKalb County, Illinois Age Dependency

53.7

Age Dependency Ratio

20.7

Old Age Dependency Ratio

33

Child Dependency Ratio

DeKalb County, Illinois Sex Ratio

Female50,65750.31%
Male50,02949.69%

DeKalb County, Illinois Population by Age

DeKalb County, Illinois Renter vs Owner Occupied by Household Type

Household Type
Count
Average Size
Owner
Renter
All39,1392.476040
Married17,0913.1685.314.7
Non Family15,9481.3837.762.3
Female4,3173.3342.557.5
Male1,7833.4459.140.9

3.11

Average Family Size

2.47

Average Household Size

60.0%

Rate of Home Ownership

Married

Male

Female

NonFamily

owner

renter

DeKalb County, Illinois Households and Families

Male

Female

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Education Attained
Count
Percentage
Less Than 9th Grade1,8653.12%
9th to 12th Grade2,3023.85%
High School Graduate14,90824.92%
Some College14,17323.69%
Associates Degree6,20010.36%
Bachelors Degree12,45020.81%
Graduate Degree7,93113.26%

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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Race
Total
High School
Bachelors
White48,62446,43516,497
Hispanic5,7214,0151,102
Black3,0342,8621,249
2+ Races2,5072,0891,077
Other Race2,2001,317313
Asian1,1971,116810
Native American206953
Islander600

The highest rate of high school graduation is among white people with a rate of 95.5%.

The highest rate of bachelors degrees is among asian people with a rate of 67.67%.

DeKalb County, Illinois Educational Attainment by Race

All

Male

Female

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Name
Average
Male
Female
Overall$47,434$58,449$35,640
Less Than 9th Grade$34,549$41,333$22,008
High School Graduate$40,905$51,590$26,302
Some College$44,624$58,018$34,175
Bachelors Degree$56,147$67,592$39,964
Graduate Degree$68,466$87,308$62,041

$47,434

Average Earnings

$58,449

Average Male

$35,640

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

88.19% of DeKalb County, Illinois residents speak only English, while 11.81% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 7.42% of the population.

DeKalb County, Illinois Language

DeKalb County, Illinois Poverty by Race

rate

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Name
Total
In Poverty
Poverty Rate
White72,5998,51311.73%
Hispanic11,8482,52221.29%
Black6,7772,50636.98%
Multiple6,2151,30020.92%
Asian2,1821,00646.1%
Other3,66191524.99%
Native4159623.13%

15.39%

Overall Poverty Rate

14.44%

Male Poverty Rate

16.33%

Female Poverty Rate

Poverty in DeKalb County, Illinois

The race most likely to be in poverty in DeKalb County, Illinois is Asian, with 46.1% below the poverty level.

The race least likely to be in poverty in DeKalb County, Illinois is White, with 11.73% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 2.76%. Among those working part-time, it was 22.24%, and for those that did not work, the poverty rate was 23.11%.

DeKalb County, Illinois Poverty

rate

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Rate
Poverty
Less Than 9th Grade18.8%
High School12.6%
Some College10.09%
Bachelors or Greater5.43%

DeKalb County, Illinois Poverty Rate by Education

rate

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Rate
Poverty
Female Unemployed42.67%
Male Unemployed33.83%
Female Employed11.4%
Male Employed6.39%

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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Name
Median
Mean
Households$68,617$86,040
Families$91,538$106,923
Married Families$110,578$124,426
Non Families$38,838$50,444

mean

median

Income by Household Type

DeKalb County, Illinois Marital Status

Married

Widowed

Divorced

Separated

NeverMarried

Marriage Rates

42.7%

Overall Marriage Rate

44.6%

Male Marriage Rate

40.9%

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

4,798

Number of Veterans

4,301

Male Veterans

497

Female Veterans

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War
Veterans
Vietnam1,494
Second Gulf War1,207
First Gulf War957
Korea286
World War II64

DeKalb County, Illinois Veterans by War

count

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Age Group
Veterans
35 to 541,363
75+1,138
65 to 74979
18 to 34685
55 to 64633

DeKalb County, Illinois Veterans by Age

count

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Name
Veterans
% of Total
White4,4116.86%
Hispanic2973.67%
Black2274.17%
Other Race893.2%
2+ Races370.93%
Asian180.84%
Native American165.3%

DeKalb County, Illinois Veterans by Race

DeKalb County, Illinois Veterans by Education

Less Than 9th Grade

High School Graduate

Some College

Bachelors or Greater

3.63%

Veteran Poverty Rate

22.25%

Veteran Disability Rate

DeKalb County, Illinois Veterans by Education

LaborForceParticipation

68.3%

Labor Force Participation

63.5%

Employment Rate

7%

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

77.07%

Born in DeKalb County, Illinois

93.52%

Native Born

6.48%

Foreign Born

3.66%

Non Citizen

2.83%

Naturalized

Place of Birth

93.52% of DeKalb County, Illinois residents were born in the United States, with 77.07% having been born in Illinois. 3.66% 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