Knox County, Illinois Population 2020

Knox County, Illinois's estimated population is 49,080 with a growth rate of -1.04% in the past year according to the most recent United States census data. Knox County, Illinois is the 30th largest county in Illinois.

Year Population Growth Growth Rate
202049,080-516-1.04%
201949,596-516-1.03%
201850,112-516-1.02%
201750,628-310-0.61%
201650,938-436-0.85%
201551,374-570-1.10%
201451,944-183-0.35%
201352,127-170-0.33%
201252,297-402-0.76%
201152,699-214-0.40%
201052,913-3,480-6.17%
199056,393-5,214-8.46%
198061,6073270.53%
197061,2800.00%
196061,2806,91412.72%
195054,3662,1164.05%
194052,2509141.78%
193051,3364,6099.86%
192046,7275681.23%
191046,1592,5475.84%
190043,6124,86012.54%
189038,7524081.06%
188038,344-1,178-2.98%
187039,52210,85937.89%
186028,66315,384115.85%
185013,2796,21988.09%
18407,0606,7862476.64%
18302740.00%

Knox County, Illinois Population Growth

Population by Race

Race Population Percentage
White43,82685.94%
Black or African American4,5708.96%
Some Other Race9811.92%
Two or More Races9511.86%
Asian5091.00%
American Indian and Alaska Native1620.32%

Knox County, Illinois Population Pyramid 2020

Knox County, Illinois Median Age

42.1


Total

40.1


Male

45.1


Female

Knox County, Illinois Adults

There are 40,941 adults, (10,379 of whom are seniors) in Knox County, Illinois.

Knox County, Illinois Age Dependency

66.9

Age Dependency Ratio

34

Old Age Dependency Ratio

32.9

Child Dependency Ratio

Knox County, Illinois Sex Ratio

Female

25,256

49.52%

Male

25,743

50.48%

Knox County, Illinois Households and Families

Knox County, Illinois Renter vs Owner Occupied by Household Type

Knox County, Illinois Household Types

Type Owner Renter
Married85.8%14.2%
All65.4%34.6%
Non Family50.5%49.5%
Female50.1%49.9%
Male48.6%51.4%

65.4%

Rate of Home Ownership

Type Count Average Size Owned
All20,8302.2565.4
Non Family8,9701.2150.5
Married8,8802.9385.8
Female2,1303.2850.1
Male8503.3848.6

2.9

Average Family Size

2.25

Average Household Size

8.3%

Unmarried (Opposite Sex)

0.3%

Unmarried (Same Sex)

Knox County, Illinois Education

Education Attained Count Percentage
Less Than 9th Grade8802.48%
9th to 12th Grade3,1088.75%
High School Graduate12,85036.16%
Some College8,43123.73%
Associates Degree3,68210.36%
Bachelors Degree4,24711.95%
Graduate Degree2,3356.57%

Knox County, Illinois Educational Attainment by Race

Name Total High School Bachelors
White31,17928,3386,172
Black2,4491,687118
Hispanic1,3801,075137
Other Race466327
Multiple Races37130135
Asian223199120
Native American818150

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 native american people with a rate of 61.73%.

Name Average Male Female
Overall$32,046$40,107$26,268
Less Than High School$19,485$24,965$13,947
High School Grad$25,078$30,744$20,638
Some College$32,182$42,361$26,089
Bachelors Degree$42,887$51,394$38,482
Graduate Degree$58,525$70,795$54,326

$32,046

Average Earnings

$40,107

Average Male

$26,268

Average Female

Knox County, Illinois Language

Knox County, Illinois Language by Age

Knox County, Illinois Language

94.50% of Knox County, Illinois residents speak only English, while 5.50% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 2.65% of the population.

Knox County, Illinois Poverty

Knox County, Illinois Poverty by Race

Name Total In Poverty Poverty Rate
White40,3125,61913.94%
Black3,1801,90960.03%
Hispanic2,28079534.87%
Other87141747.88%
Multiple90619421.41%
Asian332267.83%
Native162116.79%

18.14%

Overall Poverty Rate

17.53%

Male Poverty Rate

18.73%

Female Poverty Rate

Poverty in Knox County, Illinois

The race most likely to be in poverty in Knox County, Illinois is Black, with 60.03% below the poverty level.

The race least likely to be in poverty in Knox County, Illinois is Native, with 6.79% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 4.13%. Among those working part-time, it was 17.89%, and for those that did not work, the poverty rate was 25.38%.

Name Poverty
Less Than High School31.12%
High School17.85%
Some College9.86%
Bachelors or Greater4.15%
Name Poverty
Female Unemployed55.05%
Male Unemployed42.35%
Female Employed9.89%
Male Employed6.71%

Knox County, Illinois Income

Knox County, Illinois Income by Household Type

Name Median Mean
Households$43,709$58,735
Families$62,399$74,050
Married Families$73,377$85,523
Non Families$25,377$36,519

Knox County, Illinois Marital Status

Knox County, Illinois Marital Status

Marriage Rates

43.9%

Overall Marriage Rate

42.7%

Male Marriage Rate

45.0%

Female Marriage Rate

Knox County, Illinois Married by Age and Sex

Knox 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.

Knox County, Illinois Marital Status by Race

Knox County, Illinois Veterans

3,585

Number of Veterans

3,454

Male Veterans

131

Female Veterans

War Veterans
Vietnam1,574
First Gulf War503
Korea366
Second Gulf War327
World War II110
Name Veterans % of Total
White3,4409.60%
Black1133.28%
Hispanic482.42%
Other131.95%
Asian92.23%
2 or More81.69%
Indian22.47%

$Knox County, Illinois Veterans by Education

4.21%

Veteran Poverty Rate

29.35%

Veteran Disability Rate

Knox County, Illinois Employment Status

53.6%

Labor Force Participation

50.5%

Employment Rate

5.7%

Unemployment Rate

Knox 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

79.15%

Born in Illinois

96.84%

Native Born

3.16%

Foreign Born

2.26%

Non Citizen

Place of Birth

96.84% of Knox County, Illinois residents were born in the United States, with 79.15% having been born in Illinois. 2.26% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Africa.

  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