St. Clair County, Illinois's estimated 2023 population is 253,602 with a growth rate of -0.5% 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 -6.09% since that time.
White
Black or African American
Two or more races
Other race
Asian
Native American
Native Hawaiian or Pacific Islander
3.12
Average Family Size
2.46
Average Household Size
65.9%
Rate of Home Ownership
Married
Male
Female
NonFamily
owner
renter
Male
Female
Less Than 9th Grade
9th to 12th Grade
High School Graduate
Some College
Associates Degree
Bachelors Degree
Graduate Degree
High School Graduation Rate
Bachelors Rate
The highest rate of high school graduation is among white people with a rate of 83.21%.
The highest rate of bachelors degrees is among asian people with a rate of 46.16%.
All
Male
Female
$40,530
Average Earnings
$48,083
Average Male
$34,146
Average Female
Only English
Spanish
Other Indo-European Languages
Asian and Pacific Island Languages
Other Languages
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.
rate
17.59%
Overall Poverty Rate
13.04%
Male Poverty Rate
15.7%
Female Poverty Rate
The race most likely to be in poverty in St. Clair County, Illinois is Other, with 39.06% below the poverty level.
The race least likely to be in poverty in St. Clair County, Illinois is Native, with 6.2% 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%.
rate
rate
Households
Families
MarriedFamilies
NonFamilies
mean
median
Married
Widowed
Divorced
Separated
NeverMarried
46.1%
Overall Marriage Rate
48.7%
Male Marriage Rate
43.8%
Female Marriage Rate
male
female
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.
Married
Widowed
Divorced
Separated
NeverMarried
Second Gulf War
First Gulf War
Vietnam
Korea
World War II
24,717
Number of Veterans
21,596
Male Veterans
3,121
Female Veterans
count
count
Less Than 9th Grade
High School Graduate
Some College
Bachelors or Greater
7.24%
Veteran Poverty Rate
25.16%
Veteran Disability Rate
LaborForceParticipation
64.3%
Labor Force Participation
59.2%
Employment Rate
5.4%
Unemployment Rate
LaborForceParticipation
LaborForceParticipation
Europe
Asia
Africa
Oceania
Latin America
North America
Non citizens include legal permanent residents (green card holders), international students, temporary workers, humanitarian migrants, and illegal immigrants.
Europe
Asia
Africa
Oceania
Latin America
North America
59.66%
Born in St. Clair County, Illinois
98.35%
Native Born
3.12%
Foreign Born
1.51%
Non Citizen
1.61%
Naturalized
98.35% of St. Clair County, Illinois residents were born in the United States, with 59.66% having been born in Illinois. 1.51% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Latin America.