Clark County, Illinois Population 2020

Clark County, Illinois's estimated population is 15,809 with a growth rate of -0.32% in the past year according to the most recent United States census data. Clark County, Illinois is the 72nd largest county in Illinois.

Year Population Growth Growth Rate
201815,596-213-1.35%
201715,809-51-0.32%
201615,860-9-0.06%
201515,869-177-1.10%
201416,046-49-0.30%
201316,095-163-1.00%
201216,258580.36%
201116,200-91-0.56%
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%

How Many People Live in Clark County, Illinois?

15,809

Population by Race

Race Population Percentage
White15,35796.98%
Two or More Races2301.45%
Asian1000.63%
Some Other Race860.54%
Black or African American490.31%
American Indian and Alaska Native140.09%

Clark County, Illinois Population Pyramid 2020

Clark County, Illinois Median Age

43


Total

42.1


Male

43.6


Female

Clark County, Illinois Adults

There are 12,195 adults, (3,019 of whom are seniors) in Clark County, Illinois.

Clark County, Illinois Age Dependency

72.6

Age Dependency Ratio

32.9

Old Age Dependency Ratio

39.7

Child Dependency Ratio

Clark County, Illinois Sex Ratio

Female

8,012

50.59%

Male

7,824

49.41%

Clark County, Illinois Households and Families

Clark County, Illinois Renter vs Owner Occupied by Household Type

Clark County, Illinois Household Types

Type Owner Renter
Married83.7%16.3%
All73.9%26.1%
Non Family65.1%34.9%
Male58.6%41.4%
Female58%42%

73.9%

Rate of Home Ownership

Type Count Average Size Owned
All6,7742.3173.9
Married3,6272.7883.7
Non Family2,0551.2265.1
Female7972.6558
Male2953.1258.6

2.71

Average Family Size

2.31

Average Household Size

8%

Unmarried (Opposite Sex)

0.1%

Unmarried (Same Sex)

Clark County, Illinois Education

Education Attained Count Percentage
Less Than 9th Grade2832.58%
9th to 12th Grade7166.52%
High School Graduate4,26838.84%
Some College2,26420.60%
Associates Degree1,52213.85%
Bachelors Degree1,28111.66%
Graduate Degree6555.96%

Clark County, Illinois Educational Attainment by Race

Name Total High School Bachelors
White10,7189,7641,893
Hispanic1371132
Other Race7659
Asian757341
Multiple Races66662
Native American143
Black111

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

The highest rate of bachelors degrees is among asian people with a rate of 54.67%.

Name Average Male Female
Overall$36,046$44,901$26,612
Less Than High School$13,466$21,985$9,290
High School Grad$31,437$40,748$21,538
Some College$35,967$48,962$27,183
Bachelors Degree$52,215$61,157$37,667
Graduate Degree$46,471$54,063$45,341

$36,046

Average Earnings

$44,901

Average Male

$26,612

Average Female

Clark County, Illinois Language

Clark County, Illinois Language by Age

Clark County, Illinois Language

98.51% of Clark County, Illinois residents speak only English, while 1.49% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 0.77% of the population.

Clark County, Illinois Poverty

Clark County, Illinois Poverty by Race

Name Total In Poverty Poverty Rate
White15,0321,91312.73%
Multiple230208.70%
Black381436.84%
Hispanic235135.53%

12.60%

Overall Poverty Rate

10.24%

Male Poverty Rate

14.93%

Female Poverty Rate

Poverty in Clark County, Illinois

The race most likely to be in poverty in Clark County, Illinois is Black, with 36.84% below the poverty level.

The race least likely to be in poverty in Clark County, Illinois is Hispanic, with 5.53% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 1.97%. Among those working part-time, it was 18.13%, and for those that did not work, the poverty rate was 15.74%.

Name Poverty
Less Than High School25.44%
High School11.57%
Some College5.29%
Bachelors or Greater3.58%
Name Poverty
Female Unemployed36.05%
Male Unemployed23.71%
Female Employed10.80%
Male Employed4.92%

Clark County, Illinois Income

Clark County, Illinois Income by Household Type

Name Median Mean
Households$54,158$70,037
Families$61,967$76,692
Married Families$73,762-
Non Families$32,436$50,085

Clark County, Illinois Marital Status

Clark County, Illinois Marital Status

Marriage Rates

57.8%

Overall Marriage Rate

61.3%

Male Marriage Rate

54.5%

Female Marriage Rate

Clark County, Illinois Married by Age and Sex

Clark 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.

Clark County, Illinois Marital Status by Race

Clark County, Illinois Veterans

1,022

Number of Veterans

972

Male Veterans

50

Female Veterans

War Veterans
Vietnam313
Second Gulf War238
First Gulf War234
World War II77
Korea53

Clark County, Illinois Veterans by Race

Name Veterans % of Total
White9988.39%
Indian1178.57%
Black1122.45%
Hispanic42.60%
2 or More22.63%

Clark County, Illinois Veterans by Education

5.83%

Veteran Poverty Rate

35.08%

Veteran Disability Rate

Clark County, Illinois Employment Status

66%

Labor Force Participation

61.8%

Employment Rate

6.3%

Unemployment Rate

Clark County, Illinois Place of Birth

Origin of Non Citizens

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

Origin of Naturalized Citizens

47.37%

Born in Illinois

98.88%

Native Born

1.12%

Foreign Born

0.75%

Non Citizen

Place of Birth

98.88% of Clark County, Illinois residents were born in the United States, with 47.37% having been born in Illinois. 0.75% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Latin America.

Population of Cities in Clark County, Illinois

City 2010 Census 2016 Estimated Growth Growth Rate
Marshall39333878-55-1.40%
Casey 27772698-79-2.84%
Martinsville11671133-34-2.91%
Westfield601576-25-4.16%
  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