Cass County, Illinois Population 2021

Cass County, Illinois's estimated population is 11,817 with a growth rate of -1.38% in the past year according to the most recent United States census data. Cass County, Illinois is the 85th largest county in Illinois. The 2010 Population was 13,633 and has seen a growth of -13.32% since this time.

Note: 2020 data is projected
Year Population Growth Growth Rate
202111,817-165-1.38%
202011,982-165-1.36%
201912,147-165-1.34%
201812,312-180-1.44%
201712,492-180-1.42%
201612,672-171-1.33%
201512,843-238-1.82%
201413,081-212-1.59%
201313,293-134-1.00%
201213,427-202-1.48%
201113,629-4-0.03%
201013,6331961.46%
199013,437-1,647-10.92%
198015,0848656.08%
197014,219-320-2.20%
196014,539-558-3.70%
195015,097-1,328-8.09%
194016,425-112-0.68%
193016,537-1,359-7.59%
192017,8965243.02%
191017,3721500.87%
190017,2221,2597.89%
189015,9631,47010.14%
188014,4932,91325.16%
187011,5802552.25%
186011,3254,07256.14%
18507,2534,272143.31%
18402,9810.00%
2021 Growth Rate
-1.38%
County Website
Founded
1837
County Seat
2010 Population
13,633
Growth (since 2010)
-13.32%
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Cass County, Illinois Population Growth

Population by Race

Race Population Percentage
White11,05888.51%
Black or African American6525.22%
Some Other Race5814.65%
Two or More Races1341.07%
Asian450.36%
American Indian and Alaska Native220.18%
Native Hawaiian and Other Pacific Islander10.01%
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Cass County, Illinois Population by Race

Cass County, Illinois Population Pyramid 2021

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Cass County, Illinois Median Age

40


Total

38.1


Male

41.4


Female

Cass County, Illinois Adults

There are 9,450 adults, (2,156 of whom are seniors) in Cass County, Illinois.

Cass County, Illinois Age Dependency

71.3

Age Dependency Ratio

29.6

Old Age Dependency Ratio

41.7

Child Dependency Ratio

Cass County, Illinois Sex Ratio

Female

6,257

50.08%

Male

6,236

49.92%

Cass County, Illinois Population by Age

Cass County, Illinois Renter vs Owner Occupied by Household Type

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Cass County, Illinois Household Types

Type Owner Renter
Married85.1%14.9%
All74.6%25.4%
Non Family67.3%32.7%
Female62.6%37.4%
Male55.9%44.1%

74.6%

Rate of Home Ownership

Cass County, Illinois Households and Families

Type Count Average Size Owned
All5,0432.4474.6
Married2,415385.1
Non Family1,7071.2167.3
Female6313.3762.6
Male2903.0755.9

2.98

Average Family Size

2.44

Average Household Size

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Cass County, Illinois Households by Type

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Education Attained Count Percentage
Less Than 9th Grade4224.96%
9th to 12th Grade93611.01%
High School Graduate3,66343.08%
Some College1,59718.78%
Associates Degree6017.07%
Bachelors Degree92110.83%
Graduate Degree3634.27%
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Cass County, Illinois Educational Attainment by Sex (over 25)

Cass County, Illinois Educational Attainment by Race

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Name Total High School Bachelors
White6,9346,2911,107
Hispanic1,216594127
Black39227934
Other Race30013587
Multiple Races514316
Asian282821
Native American44

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 asian people with a rate of 75.00%.

Cass County, Illinois Educational Attainment by Race

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Name Average Male Female
Overall$33,533$41,356$27,116
Less Than High School$30,833$33,702$25,822
High School Grad$32,188$41,315$26,391
Some College$35,901$43,698$26,467
Bachelors Degree$38,354$50,208$33,125
Graduate Degree$50,139$58,421$40,962

$33,533

Average Earnings

$41,356

Average Male

$27,116

Average Female

Cass County, Illinois Earnings by Educational Attainment

Cass County, Illinois Language by Age

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Cass County, Illinois Language

82.64% of Cass County, Illinois residents speak only English, while 17.36% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 14.89% of the population.

Cass County, Illinois Language

Cass County, Illinois Poverty by Race

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Name Total In Poverty Poverty Rate
White9,2731,05611.39%
Hispanic2,36257224.22%
Black64716926.12%
Other58110317.73%
Multiple1342014.93%
Native22731.82%
Asian45613.33%

14.78%

Overall Poverty Rate

12.45%

Male Poverty Rate

17.09%

Female Poverty Rate

Poverty in Cass County, Illinois

The race most likely to be in poverty in Cass County, Illinois is Native, with 31.82% below the poverty level.

The race least likely to be in poverty in Cass County, Illinois is White, with 11.39% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 4.15%. Among those working part-time, it was 20.82%, and for those that did not work, the poverty rate was 20.87%.

Cass County, Illinois Poverty

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Name Poverty
Less Than High School17.58%
High School12.90%
Bachelors or Greater8.88%
Some College7.72%

Cass County, Illinois Poverty Rate by Education

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Name Poverty
Male Unemployed45.04%
Female Unemployed18.60%
Female Employed13.79%
Male Employed5.90%

Cass County, Illinois Poverty Rate by Employment Status and Sex

Cass County, Illinois Income by Household Type

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Name Median Mean
Households$52,373$65,654
Families$61,364$75,458
Married Families$72,904-
Non Families$31,447$42,761
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Income by Household Type

Cass County, Illinois Marital Status

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Marriage Rates

51.8%

Overall Marriage Rate

55.3%

Male Marriage Rate

48.4%

Female Marriage Rate

Cass County, Illinois Married by Age and Sex

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Cass County, Illinois Marriage

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

Cass County, Illinois Marital Status by Race

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Cass County, Illinois Marital Status

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797

Number of Veterans

789

Male Veterans

8

Female Veterans

War Veterans
Vietnam309
First Gulf War112
Korea103
Second Gulf War64
World War II18

Cass County, Illinois Veterans by War

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Age Group Veterans
65 to 74251
75+203
35 to 54183
55 to 64141
18 to 3419

Cass County, Illinois Veterans by Age

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Name Veterans % of Total
White7679.02%
Hispanic302.13%
Other174.31%
Black132.96%

Cass County, Illinois Veterans by Race

Cass County, Illinois Veterans by Education

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3.76%

Veteran Poverty Rate

32.87%

Veteran Disability Rate

Cass County, Illinois Veterans by Education

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65%

Labor Force Participation

60.6%

Employment Rate

6.5%

Unemployment Rate

Cass County, Illinois Employment by Age

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Cass County, Illinois Employment by Race

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Cass 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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76.28%

Born in Illinois

88.91%

Native Born

11.09%

Foreign Born

8.26%

Non Citizen

2.83%

Naturalized

Place of Birth

88.91% of Cass County, Illinois residents were born in the United States, with 76.28% having been born in Illinois. 8.26% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Latin America.

Cass 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