Clark County, Illinois Population 2024

15,016

Clark County, Illinois's estimated 2024 population is 15,016 with a growth rate of -0.48% in the past year according to the most recent United States census data. Clark County, Illinois is the 71st largest county in Illinois. The 2010 population was 16,291 and has seen a growth of -7.83% since that time.

Note: data after 2022 is projected based on recent change
Year
Population
Growth
Change
202914,656-72-0.49%
202814,728-72-0.49%
202714,800-72-0.48%
202614,872-72-0.48%
202514,944-72-0.48%
202415,016-72-0.48%
202315,088-72-0.47%
202215,160-192-1.25%
202115,352-77-0.5%
202015,429-36-0.23%
201915,465-129-0.83%
201815,594-230-1.45%
201715,824-36-0.23%
201615,860-21-0.13%
201515,881-179-1.11%
201416,060-45-0.28%
201316,105-160-0.98%
201216,265600.37%
201116,205-86-0.53%
201016,29100%
199015,921-992-5.87%
198016,9136974.3%
197016,216-330-1.99%
196016,546-816-4.7%
195017,362-1,480-7.85%
194018,8429705.43%
193017,872-3,293-15.56%
192021,165-2,352-10%
191023,517-516-2.15%
190024,0332,1349.74%
189021,89950.02%
188021,8943,17516.96%
187018,7193,73224.9%
186014,9875,45557.23%
18509,5322,07927.89%
18407,4533,51389.16%
18303,9403,009323.2%
1820931-13,725-93.65%
2024 Growth Rate
-0.48% (-72)
County Website
Clark County
County Seat
Marshall
2020 Population
15,429
Area
501 mi²
Density
30 people/mi²
Growth Since 2020
-2.68% (-413)
Founded
1819

Population by Race

Race
Population
Percentage (of total)
White14,69295.85%
Two or more races4562.97%
Black or African American1060.69%
Other race440.29%
Asian250.16%
Native American50.03%
Native Hawaiian or Pacific Islander00%

White

Two or more races

Black or African American

Other race

Asian

Native American

Native Hawaiian or Pacific Islander

Clark County, Illinois Population by Race

Clark County, Illinois Population Pyramid 2024

Clark County, Illinois Median Age

42

Total

40.1

Male

43.7

Female

Clark County, Illinois Adults

There are 11,905 adults, (3,018 of whom are seniors) in Clark County, Illinois.

Clark County, Illinois Age Dependency

72.5

Age Dependency Ratio

34

Old Age Dependency Ratio

38.5

Child Dependency Ratio

Clark County, Illinois Sex Ratio

Female7,66249.99%
Male7,66650.01%

Clark County, Illinois Population by Age

Clark County, Illinois Renter vs Owner Occupied by Household Type

Household Type
Count
Average Size
Owner
Renter
All6,5972.2881.718.3
Married3,3432.8928
Non Family2,0621.1871.128.9
Female7412.5760.939.1
Male451388.211.8

2.71

Average Family Size

2.28

Average Household Size

81.7%

Rate of Home Ownership

Married

Male

Female

NonFamily

owner

renter

Clark County, Illinois Households and Families

Male

Female

Education Attained
Count
Percentage
9th to 12th Grade6325.86%
Associates Degree1,55714.43%
Bachelors Degree1,54614.33%
Graduate Degree1,0739.94%
High School Graduate3,80535.26%
Less Than 9th Grade2272.1%
Some College1,95018.07%

Less Than 9th Grade

9th to 12th Grade

High School Graduate

Some College

Associates Degree

Bachelors Degree

Graduate Degree

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

Clark County, Illinois Educational Attainment by Race

High School Graduation Rate

Bachelors Rate

Race
Total
High School
Bachelors
White10,3349,5612,529
2+ Races32828070
Hispanic16913356
Black41320
Other Race3240
Asian252420
Native American550

The highest rate of high school graduation is among native american people with a rate of 100%.

The highest rate of bachelors degrees is among asian people with a rate of 80%.

Clark County, Illinois Educational Attainment by Race

All

Male

Female

Name
Average
Male
Female
Bachelors Degree$53,512$80,662$43,542
Graduate Degree$70,057$74,826$54,838
High School Graduate$40,642$44,250$28,646
Less Than 9th Grade$0$45,403$21,492
Overall$46,712$57,845$36,376
Some College$45,677$59,629$31,541

$46,712

Average Earnings

$57,845

Average Male

$36,376

Average Female

Clark County, Illinois Earnings by Educational Attainment

Clark County, Illinois Language by Age

Only English

Spanish

Other Indo-European Languages

Asian and Pacific Island Languages

Other Languages

Clark County, Illinois Language

97.78% of Clark County, Illinois residents speak only English, while 2.22% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 1.34% of the population.

Clark County, Illinois Language

Clark County, Illinois Poverty by Race

rate

Name
Total
In Poverty
Poverty Rate
White14,4171,3919.65%
Multiple443204.51%
Black551425.45%

9.49%

Overall Poverty Rate

8.52%

Male Poverty Rate

10.45%

Female Poverty Rate

Poverty in Clark County, Illinois

The race most likely to be in poverty in Clark County, Illinois is Black, with 25.45% below the poverty level.

The race least likely to be in poverty in Clark County, Illinois is Multiple, with 4.51% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 1.64%. Among those working part-time, it was 15.3%, and for those that did not work, the poverty rate was 13.59%.

Clark County, Illinois Poverty

rate

Rate
Poverty
Less Than 9th Grade21.76%
High School12.97%
Some College5.91%
Bachelors or Greater1.38%

Clark County, Illinois Poverty Rate by Education

rate

Rate
Poverty
Male Unemployed17.88%
Female Unemployed16.22%
Female Employed8.02%
Male Employed4.93%

Clark County, Illinois Poverty Rate by Employment Status and Sex

Clark County, Illinois Income by Household Type

Households

Families

MarriedFamilies

NonFamilies

Name
Median
Mean
Families$84,951$97,285
Households$70,625$83,186
Married Families$101,014$-999,999,999
Non Families$40,076$47,923

mean

median

Income by Household Type

Clark County, Illinois Marital Status

Married

Widowed

Divorced

Separated

NeverMarried

Marriage Rates

54.9%

Overall Marriage Rate

56.6%

Male Marriage Rate

53.3%

Female Marriage Rate

Clark County, Illinois Married by Age and Sex

male

female

Clark County, Illinois Marriage

The age group where males are most likely to be married is 55-64, while the female age group most likely to be married is 45-54.

Clark County, Illinois Marital Status by Race

Married

Widowed

Divorced

Separated

NeverMarried

Clark County, Illinois Marital Status

Second Gulf War

First Gulf War

Vietnam

Korea

World War II

938

Number of Veterans

908

Male Veterans

30

Female Veterans

War
Veterans
Vietnam385
Second Gulf War219
First Gulf War162
Korea92
World War II8

Clark County, Illinois Veterans by War

count

Age Group
Veterans
75+287
65 to 74266
35 to 54246
55 to 6489
18 to 3450

Clark County, Illinois Veterans by Age

count

Name
Veterans
% of Total
White9238.09%
2+ Races102.74%
Native American5100%

Clark County, Illinois Veterans by Race

Clark County, Illinois Veterans by Education

Less Than 9th Grade

High School Graduate

Some College

Bachelors or Greater

11.21%

Veteran Poverty Rate

34.51%

Veteran Disability Rate

Clark County, Illinois Veterans by Education

LaborForceParticipation

59.7%

Labor Force Participation

57.2%

Employment Rate

4%

Unemployment Rate

Clark County, Illinois Employment by Age

LaborForceParticipation

Clark County, Illinois Employment by Race

LaborForceParticipation

Clark 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

46.4%

Born in Clark County, Illinois

98.94%

Native Born

1.06%

Foreign Born

0.7%

Non Citizen

0.36%

Naturalized

Place of Birth

98.94% of Clark County, Illinois residents were born in the United States, with 46.4% having been born in Illinois. 0.7% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Europe.

Clark County, Illinois Place of Birth

Sources