Clark County, Illinois Population 2021

Clark County, Illinois's estimated population is 15,123 with a growth rate of -1.04% in the past year according to the most recent United States census data. Clark County, Illinois is the 72nd largest county in Illinois. The 2010 Population was 16,291 and has seen a growth of -7.17% since this time.

Note: 2020 and 2021 data is projected
Year Population Growth Growth Rate
202115,123-159-1.04%
202015,282-159-1.03%
201915,441-159-1.02%
201815,600-212-1.34%
201715,812-45-0.28%
201615,857-11-0.07%
201515,868-179-1.12%
201416,047-48-0.30%
201316,095-164-1.01%
201216,259570.35%
201116,202-89-0.55%
201016,2913702.32%
199015,921-992-5.87%
198016,9136974.30%
197016,216-330-1.99%
196016,546-816-4.70%
195017,362-1,480-7.85%
194018,8429705.43%
193017,872-3,293-15.56%
192021,165-2,352-10.00%
191023,517-516-2.15%
190024,0332,1349.74%
189021,89950.02%
188021,8943,17516.96%
187018,7193,73224.90%
186014,9875,45557.23%
18509,5322,07927.89%
18407,4533,51389.16%
18303,9403,009323.20%
18209310.00%
2021 Growth Rate
-1.04%
County Website
Founded
1819
County Seat
2010 Population
16,291
Growth Since 2010
-7.17%
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Clark County, Illinois Population Growth

Population by Race

Race Population Percentage
White15,22096.84%
Two or More Races1891.20%
Black or African American1070.68%
Asian980.62%
Some Other Race920.59%
American Indian and Alaska Native100.06%
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Clark County, Illinois Population by Race

Clark County, Illinois Population Pyramid $2021

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Clark County, Illinois Median Age

42.3


Total

40.5


Male

43.5


Female

Clark County, Illinois Adults

There are 12,093 adults, (3,041 of whom are seniors) in Clark County, Illinois.

Clark County, Illinois Age Dependency

73.6

Age Dependency Ratio

33.6

Old Age Dependency Ratio

40

Child Dependency Ratio

Clark County, Illinois Sex Ratio

Female

7,960

50.65%

Male

7,756

49.35%

Clark County, Illinois Population by Age

Clark County, Illinois Renter vs Owner Occupied by Household Type

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Clark County, Illinois Household Types

Type Owner Renter
Married85.5%14.5%
All76.6%23.4%
Male69.9%30.1%
Non Family67.9%32.1%
Female57.5%42.5%

76.6%

Rate of Home Ownership

Clark County, Illinois Households and Families

Type Count Average Size Owned
All6,7202.3176.6
Married3,7012.7885.5
Non Family1,9001.1867.9
Female7432.5257.5
Male3762.9169.9

2.68

Average Family Size

2.31

Average Household Size

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Clark County, Illinois Households by Type

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Education Attained Count Percentage
Less Than 9th Grade2352.15%
9th to 12th Grade5515.04%
High School Graduate4,37139.95%
Some College2,06918.91%
Associates Degree1,54314.10%
Bachelors Degree1,36112.44%
Graduate Degree8117.41%
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Clark County, Illinois Educational Attainment by Sex (over 25)

Clark County, Illinois Educational Attainment by Race

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Race Total High School Bachelors
White10,6659,9082,119
Hispanic14012110
Other Race8670
Asian767443
2+ Races494910
Black3533
Native American103

The highest rate of high school graduation is among 2+ races people with a rate of 100.00%.

The highest rate of bachelors degrees is among asian people with a rate of 56.58%.

Clark County, Illinois Educational Attainment by Race

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Name Average Male Female
Overall$36,651$47,662$26,632
Less Than 9th Grade$12,983$23,510$9,250
High School Graduate$33,165$40,563$23,066
Some College$35,731$48,177$26,027
Bachelors Degree$52,525$64,078$33,152
Graduate Degree$54,167$61,848$46,731

$36,651

Average Earnings

$47,662

Average Male

$26,632

Average Female

Clark County, Illinois Earnings by Educational Attainment

Clark County, Illinois Language by Age

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Clark County, Illinois Language

98.22% of Clark County, Illinois residents speak only English, while 1.78% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 0.84% of the population.

Clark County, Illinois Language

Clark County, Illinois Poverty by Race

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Name Total In Poverty Poverty Rate
White14,9201,66111.13%
Black1004040.00%
Multiple189178.99%

11.12%

Overall Poverty Rate

10.31%

Male Poverty Rate

11.92%

Female Poverty Rate

Poverty in Clark County, Illinois

The race most likely to be in poverty in Clark County, Illinois is Black, with 40.00% below the poverty level.

The race least likely to be in poverty in Clark County, Illinois is Multiple, with 8.99% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 2.50%. Among those working part-time, it was 14.83%, and for those that did not work, the poverty rate was 14.77%.

Clark County, Illinois Poverty

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Name Poverty
Less Than 9th Grade28.00%
High School10.18%
Some College5.20%
Bachelors or Greater3.18%

Clark County, Illinois Poverty Rate by Education

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Rate Poverty
Female Unemployed39.68%
Male Unemployed24.37%
Female Employed8.80%
Male Employed5.24%

Clark County, Illinois Poverty Rate by Employment Status and Sex

Clark County, Illinois Income by Household Type

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Name Median Mean
Households$56,531$72,492
Families$66,615$79,001
Married Families$80,475-
Non Families$32,021$51,769
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Income by Household Type

Clark County, Illinois Marital Status

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Marriage Rates

59.7%

Overall Marriage Rate

63.2%

Male Marriage Rate

56.3%

Female Marriage Rate

Clark County, Illinois Married by Age and Sex

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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 55-64.

Clark County, Illinois Marital Status by Race

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Clark County, Illinois Marital Status

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941

Number of Veterans

892

Male Veterans

49

Female Veterans

War Veterans
Vietnam305
Second Gulf War272
First Gulf War245
Korea47
World War II39

Clark County, Illinois Veterans by War

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Age Group Veterans
35 to 54303
75+238
65 to 74217
18 to 34109
55 to 6474

Clark County, Illinois Veterans by Age

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Name Veterans % of Total
White9277.85%
Native American770.00%
Black59.62%
Hispanic42.56%
2+ Races23.77%

Clark County, Illinois Veterans by Race

Clark County, Illinois Veterans by Education

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7.94%

Veteran Poverty Rate

34.79%

Veteran Disability Rate

Clark County, Illinois Veterans by Education

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64.2%

Labor Force Participation

60.7%

Employment Rate

5.5%

Unemployment Rate

Clark County, Illinois Employment by Age

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Clark County, Illinois Employment by Race

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Clark County, Illinois Employment by Education

Origin of Non-Citizens

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

Origin of Naturalized Citizens

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48.29%

Born in Clark County, Illinois

98.79%

Native Born

1.21%

Foreign Born

0.94%

Non Citizen

0.27%

Naturalized

Place of Birth

98.79% of Clark County, Illinois residents were born in the United States, with 48.29% having been born in Illinois. 0.94% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Latin America.

Clark County, Illinois Place of Birth

  1. US Census City/Town Population estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. Population of States and Counties of the United States: 1790 - 1990

Sources