Cook County, Illinois Population 2020

Cook County, Illinois's estimated population is 5,132,480 with a growth rate of -0.47% in the past year according to the most recent United States census data. Cook County, Illinois is the largest county in Illinois.

Year Population Growth Growth Rate
20205,132,480-24,000-0.47%
20195,156,480-24,010-0.46%
20185,180,490-24,010-0.46%
20175,204,500-23,960-0.46%
20165,228,460-19,200-0.37%
20155,247,660-9,820-0.19%
20145,257,4802,6000.05%
20135,254,88014,3800.27%
20125,240,50020,5200.39%
20115,219,98020,8100.40%
20105,199,17094,1001.84%
19905,105,070-148,590-2.83%
19805,253,660-238,710-4.35%
19705,492,370362,6507.07%
19605,129,720620,93013.77%
19504,508,790445,45010.96%
19404,063,34081,2202.04%
19303,982,120929,10030.43%
19203,053,020647,79026.93%
19102,405,230566,49030.81%
19001,838,740646,82054.27%
18901,191,920584,39696.19%
1880607,524257,55873.60%
1870349,966205,012141.43%
1860144,954101,569234.11%
185043,38533,184325.30%
184010,2010.00%
2020 Growth Rate
-0.47%
County Website
County Seat

Cook County, Illinois Population Growth

Population by Race

Race Population Percentage
White2,957,55756.62%
Black or African American1,230,49823.56%
Some Other Race508,7929.74%
Asian376,1157.20%
Two or More Races134,2652.57%
American Indian and Alaska Native14,5830.28%
Native Hawaiian and Other Pacific Islander1,9090.04%

Cook County, Illinois Population Pyramid 2020

Cook County, Illinois Median Age

36.6


Total

35.4


Male

37.7


Female

Cook County, Illinois Adults

There are 4,063,290 adults, (724,730 of whom are seniors) in Cook County, Illinois.

Cook County, Illinois Age Dependency

56.5

Age Dependency Ratio

21.7

Old Age Dependency Ratio

34.8

Child Dependency Ratio

Cook County, Illinois Sex Ratio

Female

2,689,080

51.48%

Male

2,534,640

48.52%

Cook County, Illinois Households and Families

Cook County, Illinois Renter vs Owner Occupied by Household Type

Cook County, Illinois Household Types

Type Owner Renter
Married75.9%24.1%
All56.9%43.1%
Male51.2%48.8%
Female43.3%56.7%
Non Family43%57%

56.9%

Rate of Home Ownership

Type Count Average Size Owned
All1,963,0702.6156.9
Married803,3263.4475.9
Non Family779,2641.2743
Female282,8473.6343.3
Male97,6333.6251.2

3.41

Average Family Size

2.61

Average Household Size

5.4%

Unmarried (Opposite Sex)

0.4%

Unmarried (Same Sex)

Cook County, Illinois Education

Education Attained Count Percentage
Less Than 9th Grade241,9026.74%
9th to 12th Grade235,5246.57%
High School Graduate837,56923.35%
Some College675,50118.83%
Associates Degree234,5596.54%
Bachelors Degree811,18522.61%
Graduate Degree550,78915.36%

Cook County, Illinois Educational Attainment by Race

Name Total High School Bachelors
White1,704,1001,610,570874,838
Black809,088702,114179,012
Hispanic755,478508,763113,242
Other Race293,742181,36830,958
Asian274,977247,411172,055
Multiple Races60,81654,72627,585
Native American10,2417,3932,195
Islander1,2891,082362

The highest rate of high school graduation is among white people with a rate of 94.51%.

The highest rate of bachelors degrees is among asian people with a rate of 62.57%.

Name Average Male Female
Overall$42,020$48,366$37,143
Less Than High School$24,213$27,375$19,881
High School Grad$30,032$33,684$24,754
Some College$36,151$42,319$30,921
Bachelors Degree$57,291$66,116$50,496
Graduate Degree$75,612$92,516$64,919

$42,020

Average Earnings

$48,366

Average Male

$37,143

Average Female

Cook County, Illinois Language

Cook County, Illinois Language by Age

Cook County, Illinois Language

64.83% of Cook County, Illinois residents speak only English, while 35.17% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 20.68% of the population.

Cook County, Illinois Poverty

Cook County, Illinois Poverty by Race

Name Total In Poverty Poverty Rate
Black1,204,550317,73026.38%
Hispanic1,302,440232,20517.83%
White2,178,000170,5477.83%
Other505,57595,46018.88%
Asian369,69246,24212.51%
Multiple131,99620,48615.52%
Native14,3902,44016.96%
Islander1,81322512.41%

15.14%

Overall Poverty Rate

13.68%

Male Poverty Rate

16.52%

Female Poverty Rate

Poverty in Cook County, Illinois

The race most likely to be in poverty in Cook County, Illinois is Black, with 26.38% below the poverty level.

The race least likely to be in poverty in Cook County, Illinois is White, with 7.83% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 2.59%. Among those working part-time, it was 16.56%, and for those that did not work, the poverty rate was 25.96%.

Name Poverty
Less Than High School24.52%
High School16.09%
Some College12.22%
Bachelors or Greater5.34%
Name Poverty
Female Unemployed38.34%
Male Unemployed30.82%
Female Employed7.18%
Male Employed5.37%

Cook County, Illinois Income

Cook County, Illinois Income by Household Type

Name Median Mean
Households$62,088$91,216
Families$76,327$108,651
Married Families$97,916$132,798
Non Families$41,863$62,053

Cook County, Illinois Marital Status

Cook County, Illinois Marital Status

Marriage Rates

42.0%

Overall Marriage Rate

44.3%

Male Marriage Rate

39.8%

Female Marriage Rate

Cook County, Illinois Married by Age and Sex

Cook 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 45-54.

Cook County, Illinois Marital Status by Race

Cook County, Illinois Veterans

164,687

Number of Veterans

153,452

Male Veterans

11,235

Female Veterans

War Veterans
Vietnam57,993
First Gulf War23,412
Second Gulf War20,769
Korea17,956
World War II10,160
Age Group Veterans
75+48,610
65 to 7445,728
35 to 5433,488
55 to 6424,712
18 to 3412,149
Name Veterans % of Total
White103,8034.37%
Black50,0285.34%
Hispanic14,1441.57%
Other3,9541.12%
2 or More3,2794.34%
Asian2,9950.97%
Indian4774.13%
Hawaiian15110.45%

$Cook County, Illinois Veterans by Education

8.41%

Veteran Poverty Rate

28.25%

Veteran Disability Rate

Cook County, Illinois Employment Status

66%

Labor Force Participation

60.8%

Employment Rate

7.8%

Unemployment Rate

Cook 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

61.59%

Born in Illinois

78.95%

Native Born

21.05%

Foreign Born

10.51%

Non Citizen

Place of Birth

78.95% of Cook County, Illinois residents were born in the United States, with 61.59% having been born in Illinois. 10.51% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Latin America.

  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