St. Clair County, Illinois Population 2022

St. Clair County, Illinois's estimated population is 254,868 with a growth rate of -0.49% in the past year according to the most recent United States census data. St. Clair County, Illinois is the 9th largest county in Illinois. The 2010 Population was 270,056 and has seen a growth of -5.62% since this time.

Note: 2021 and 2022 data is projected
Year Population Growth Annual Growth Rate
18001,3550.00%
18105,0073,652269.52%
18205,2532464.91%
18307,0781,82534.74%
184013,6316,55392.58%
185020,1806,54948.04%
186037,69417,51486.79%
187051,06813,37435.48%
188061,80610,73821.03%
189066,5714,7657.71%
190086,68520,11430.21%
1910119,87033,18538.28%
1920136,52016,65013.89%
1930157,77521,25515.57%
1940166,8999,1245.78%
1950205,99539,09623.42%
1960262,50956,51427.43%
1970285,17622,6678.63%
1980267,531-17,645-6.19%
1990262,852-4,679-1.75%
2010270,0567,2042.74%
2011268,790-1,266-0.47%
2012267,524-1,266-0.47%
2013266,258-1,266-0.47%
2014264,992-1,266-0.48%
2015263,726-1,266-0.48%
2016262,460-1,266-0.48%
2017261,194-1,266-0.48%
2018259,928-1,266-0.48%
2019258,662-1,266-0.49%
2020257,400-1,262-0.49%
2021256,134-1,266-0.49%
2022254,868-1,266-0.49%
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St. Clair County, Illinois Population Growth

Population by Race

Race Population Percentage
White165,01563.18%
Black or African American77,93429.84%
American Indian and Alaska Native4380.17%
Asian3,7701.44%
Native Hawaiian and Other Pacific Islander510.02%
Some Other Race3,9591.52%
Two or More Races10,0193.84%
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St. Clair County, Illinois Population by Race

St. Clair County, Illinois Population Pyramid 2022

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St. Clair County, Illinois Median Age

39.1


Total

37.4


Male

40.6


Female

St. Clair County, Illinois Adults

There are 199,862 adults, (41,097 of whom are seniors) in St. Clair County, Illinois.

St. Clair County, Illinois Age Dependency

Age Dependency Ratio

25.9

Old Age Dependency Ratio

38.6

Child Dependency Ratio

St. Clair County, Illinois Sex Ratio

Female

135,053

51.71%

Male

126,133

48.29%

St. Clair County, Illinois Population by Age

St. Clair County, Illinois Renter vs Owner Occupied by Household Type

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St. Clair County, Illinois Household Types

Type Owner Renter
Married84.6%15.4%
All65.9%34.1%
Male64.5%35.5%
Non Family53.2%46.8%
Female42.6%57.4%

65.9%

Rate of Home Ownership

St. Clair County, Illinois Households and Families

Type Count Average Size Owned
All104,6312.4665.9
Married45,7093.184.6
Male4,9033.1464.5
Female15,6463.5942.6
Non Family38,3731.1553.2

3.12

Average Family Size

2.46

Average Household Size

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St. Clair County, Illinois Households by Type

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Education Attained Count Percentage
Less Than 9th Grade4,4482.50%
9th to 12th Grade10,3545.81%
High School Graduate49,55027.81%
Some College43,66424.50%
Associates Degree18,44310.35%
Bachelors Degree30,35117.03%
Graduate Degree21,38912.00%
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St. Clair County, Illinois Educational Attainment by Sex (over 25)

St. Clair County, Illinois Educational Attainment by Race

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Race Total High School Bachelors
Asian2,7192,3821,442
Islander17177
White116,944111,03739,659
2+ Races3,4363,2141,065
Other Race2,2151,512534
Hispanic5,8504,4181,307
Native American31830360
Black49,49142,5598,184

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

The highest rate of bachelors degrees is among asian people with a rate of 53.03%.

St. Clair County, Illinois Educational Attainment by Race

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Name Average Male Female
Overall$40,530$48,083$34,146
Less Than 9th Grade$21,952$23,434$20,433
High School Graduate$29,916$35,340$24,056
Some College$36,332$45,445$30,307
Bachelors Degree$55,230$67,663$48,299
Graduate Degree$66,843$86,211$57,591

$40,530

Average Earnings

$48,083

Average Male

$34,146

Average Female

St. Clair County, Illinois Earnings by Educational Attainment

St. Clair County, Illinois Language by Age

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St. Clair County, Illinois Language

94.79% of St. Clair County, Illinois residents speak only English, while 5.21% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 2.76% of the population.

St. Clair County, Illinois Language

St. Clair County, Illinois Poverty by Race

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Name Total In Poverty Poverty Rate
Black76,52721,98128.72%
Hispanic10,7972,65724.61%
Multiple9,7111,94420.02%
Islander51611.76%
White156,81211,0237.03%
Native403256.20%
Asian3,7022246.05%
Other1,083NaN%

14.42%

Overall Poverty Rate

13.04%

Male Poverty Rate

15.70%

Female Poverty Rate

Poverty in St. Clair County, Illinois

The race most likely to be in poverty in St. Clair County, Illinois is Black, with 28.72% below the poverty level.

The race least likely to be in poverty in St. Clair County, Illinois is Other, with NaN% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 2.93%. Among those working part-time, it was 17.71%, and for those that did not work, the poverty rate was 21.52%.

St. Clair County, Illinois Poverty

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Name Poverty
Less Than 9th Grade28.19%
High School16.22%
Some College9.80%
Bachelors or Greater4.00%

St. Clair County, Illinois Poverty Rate by Education

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Rate Poverty
Male Employed5.01%
Male Unemployed29.49%
Female Employed9.96%
Female Unemployed31.20%

St. Clair County, Illinois Poverty Rate by Employment Status and Sex

St. Clair County, Illinois Income by Household Type

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Name Median Mean
Households$57,473$76,811
Families$77,323$94,587
Married Families$97,140$115,535
Non Families$31,383$42,794
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Income by Household Type

St. Clair County, Illinois Marital Status

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Marriage Rates

46.1%

Overall Marriage Rate

48.7%

Male Marriage Rate

43.8%

Female Marriage Rate

St. Clair County, Illinois Married by Age and Sex

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St. Clair 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.

St. Clair County, Illinois Marital Status by Race

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St. Clair County, Illinois Marital Status

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24,717

Number of Veterans

Male Veterans

Female Veterans

War Veterans
Second Gulf War6,915
First Gulf War8,627
Vietnam8,024
Korea1,435
World War II652

St. Clair County, Illinois Veterans by War

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Age Group Veterans
18 to 342,224
35 to 547,185
55 to 645,135
65 to 746,187
75+3,986

St. Clair County, Illinois Veterans by Age

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Name Veterans % of Total
White18,35414.20%
Black5,3629.43%
Native American8623.50%
Asian1494.93%
Islander728.00%
Other Race1335.25%
2+ Races62614.52%
Hispanic6068.86%

St. Clair County, Illinois Veterans by Race

St. Clair County, Illinois Veterans by Education

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7.24%

Veteran Poverty Rate

25.16%

Veteran Disability Rate

St. Clair County, Illinois Veterans by Education

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64.3%

Labor Force Participation

59.2%

Employment Rate

5.4%

Unemployment Rate

St. Clair County, Illinois Employment by Age

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St. Clair County, Illinois Employment by Race

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St. Clair 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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58.80%

Born in St. Clair County, Illinois

96.93%

Native Born

3.07%

Foreign Born

1.49%

Non Citizen

1.59%

Naturalized

Place of Birth

96.93% of St. Clair County, Illinois residents were born in the United States, with 58.80% having been born in Illinois. 1.49% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Latin America.

St. Clair 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