Johnson County, Illinois Population 2021

Johnson County, Illinois's estimated population is 12,405 with a growth rate of -0.05% in the past year according to the most recent United States census data. Johnson County, Illinois is the 83rd largest county in Illinois. The 2010 Population was 12,604 and has seen a growth of -1.58% since this time.

Note: 2020 and 2021 data is projected
Year Population Growth Growth Rate
202112,405-6-0.05%
202012,411-6-0.05%
201912,417-6-0.05%
201812,423240.19%
201712,399-55-0.44%
201612,454-323-2.53%
201512,777-110-0.85%
201412,887200.16%
201312,867110.09%
201212,85610.01%
201112,8552511.99%
201012,6041,25711.08%
199011,3471,72317.90%
19809,6242,07427.47%
19707,5506228.98%
19606,928-1,801-20.63%
19508,729-1,998-18.63%
194010,7275245.14%
193010,203-1,819-15.13%
192012,022-2,309-16.11%
191014,331-1,336-8.53%
190015,6676544.36%
189015,0131,93514.80%
188013,0781,83016.27%
187011,2481,90620.40%
18609,3425,228127.08%
18504,11448813.46%
18403,6262,030127.19%
18301,59675389.32%
18208430.00%
2021 Growth Rate
-0.05%
Founded
1812
County Seat
2010 Population
12,604
Growth Since 2010
-1.58%
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Johnson County, Illinois Population Growth

Population by Race

Race Population Percentage
White10,95487.67%
Black or African American1,40811.27%
Asian440.35%
Some Other Race420.34%
Two or More Races360.29%
American Indian and Alaska Native100.08%
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Johnson County, Illinois Population by Race

Johnson County, Illinois Population Pyramid $2021

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Johnson County, Illinois Median Age

43.7


Total

41.2


Male

47.9


Female

Johnson County, Illinois Adults

There are 10,230 adults, (2,615 of whom are seniors) in Johnson County, Illinois.

Johnson County, Illinois Age Dependency

64.1

Age Dependency Ratio

34.3

Old Age Dependency Ratio

29.7

Child Dependency Ratio

Johnson County, Illinois Sex Ratio

Female

5,554

44.45%

Male

6,940

55.55%

Johnson County, Illinois Population by Age

Johnson County, Illinois Renter vs Owner Occupied by Household Type

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Johnson County, Illinois Household Types

Type Owner Renter
Married94.9%5.1%
All84.2%15.8%
Non Family70.6%29.4%
Male70.5%29.5%
Female64.8%35.2%

84.2%

Rate of Home Ownership

Johnson County, Illinois Households and Families

Type Count Average Size Owned
All4,3032.3884.2
Married2,5012.8594.9
Non Family1,2611.1570.6
Female4092.6964.8
Male1324.0970.5

2.81

Average Family Size

2.38

Average Household Size

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Johnson County, Illinois Households by Type

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Education Attained Count Percentage
Less Than 9th Grade4324.69%
9th to 12th Grade1,20313.06%
High School Graduate2,90631.56%
Some College2,34325.45%
Associates Degree8529.25%
Bachelors Degree1,05411.45%
Graduate Degree4184.54%
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Johnson County, Illinois Educational Attainment by Sex (over 25)

Johnson County, Illinois Educational Attainment by Race

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Race Total High School Bachelors
White7,6936,8631,451
Black1,1676066
Hispanic312725
Asian33326
Other Race207
2+ Races14114
Native American77

The highest rate of high school graduation is among native american people with a rate of 100.00%.

The highest rate of bachelors degrees is among 2+ races people with a rate of 28.57%.

Johnson County, Illinois Educational Attainment by Race

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Name Average Male Female
Overall$39,417$51,010$31,172
Less Than 9th Grade$20,603$25,417$19,583
High School Graduate$32,000$43,317$20,938
Some College$36,462$53,247$29,688
Bachelors Degree$50,650$58,333$43,646
Graduate Degree$56,035$44,432$56,445

$39,417

Average Earnings

$51,010

Average Male

$31,172

Average Female

Johnson County, Illinois Earnings by Educational Attainment

Johnson County, Illinois Language by Age

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Johnson County, Illinois Language

96.44% of Johnson County, Illinois residents speak only English, while 3.56% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 2.63% of the population.

Johnson County, Illinois Language

Johnson County, Illinois Poverty by Race

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Name Total In Poverty Poverty Rate
White9,9891,06610.67%
Multiple361336.11%
Hispanic911112.09%
Asian32412.50%
Black22418.18%

10.77%

Overall Poverty Rate

8.98%

Male Poverty Rate

12.30%

Female Poverty Rate

Poverty in Johnson County, Illinois

The race most likely to be in poverty in Johnson County, Illinois is Multiple, with 36.11% below the poverty level.

The race least likely to be in poverty in Johnson County, Illinois is White, with 10.67% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 2.65%. Among those working part-time, it was 11.16%, and for those that did not work, the poverty rate was 14.69%.

Johnson County, Illinois Poverty

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Name Poverty
Less Than 9th Grade21.20%
High School11.97%
Some College8.51%
Bachelors or Greater2.80%

Johnson County, Illinois Poverty Rate by Education

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Rate Poverty
Male Unemployed31.91%
Female Unemployed14.29%
Female Employed3.85%
Male Employed3.74%

Johnson County, Illinois Poverty Rate by Employment Status and Sex

Johnson County, Illinois Income by Household Type

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Name Median Mean
Households$52,774$68,684
Families$63,421$78,478
Married Families$70,172-
Non Families$28,105$39,584
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Income by Household Type

Johnson County, Illinois Marital Status

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Marriage Rates

51.1%

Overall Marriage Rate

44.5%

Male Marriage Rate

59.5%

Female Marriage Rate

Johnson County, Illinois Married by Age and Sex

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Johnson 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 35-44.

Johnson County, Illinois Marital Status by Race

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Johnson County, Illinois Marital Status

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958

Number of Veterans

925

Male Veterans

33

Female Veterans

War Veterans
Vietnam389
First Gulf War164
Korea133
Second Gulf War61
World War II39

Johnson County, Illinois Veterans by War

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Age Group Veterans
65 to 74310
75+291
35 to 54179
55 to 64141
18 to 3437

Johnson County, Illinois Veterans by Age

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Name Veterans % of Total
White93910.77%
Black140.99%
Native American440.00%
2+ Races17.14%

Johnson County, Illinois Veterans by Race

Johnson County, Illinois Veterans by Education

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9.46%

Veteran Poverty Rate

36.56%

Veteran Disability Rate

Johnson County, Illinois Veterans by Education

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37.9%

Labor Force Participation

36.1%

Employment Rate

4.3%

Unemployment Rate

Johnson County, Illinois Employment by Age

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Johnson County, Illinois Employment by Race

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Johnson 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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74.09%

Born in Johnson County, Illinois

98.14%

Native Born

1.86%

Foreign Born

1.18%

Non Citizen

0.69%

Naturalized

Place of Birth

98.14% of Johnson County, Illinois residents were born in the United States, with 74.09% having been born in Illinois. 1.18% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Latin America.

Johnson 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