St. Clair township is located in St. Clair County Illinois. St. Clair township has a 2024 population of 35,976. St. Clair township is currently growing at a rate of 0.93% annually and its population has increased by 0.76% since the most recent census, which recorded a population of 35,704 in 2020.
The average household income in St. Clair township is $98,699 with a poverty rate of 10.29%. The median age in St. Clair township is 42.1 years: 39.5 years for males, and 43.9 years for females.
According to the most recent ACS, the racial composition of St. Clair township was:
White
Black or African American
Two or more races
Asian
Other race
Native American
Native Hawaiian or Pacific Islander
Household Type | Count | Average Size | Owner | Renter |
|---|---|---|---|---|
| All | 14,513 | 2.44 | 72.4 | 27.6 |
| Married | 6,762 | 3.16 | 86.7 | 13.3 |
| Non Family | 5,541 | 1.15 | 59.6 | 40.4 |
| Female | 1,811 | 3.45 | 64.4 | 35.6 |
| Male | 399 | 3.6 | 45.1 | 54.9 |
3.15
Average Family Size
2.44
Average Household Size
72.4%
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 native american people with a rate of 100%.
The highest rate of bachelors degrees is among other race people with a rate of 52.22%.
All
Male
Female
$46,516
Average Earnings
$56,335
Average Male
$40,649
Average Female
Only English
Spanish
Other Indo-European Languages
Asian and Pacific Island Languages
Other Languages
93.84% of St. Clair township residents speak only English, while 6.16% speak other languages. The non-English language spoken by the largest group is Asian and Pacific Island languages, which is spoken by 2.2% of the population.
rate
10.29%
Overall Poverty Rate
9.2%
Male Poverty Rate
11.34%
Female Poverty Rate
The race most likely to be in poverty in St. Clair township is Black, with 17.34% below the poverty level.
The race least likely to be in poverty in St. Clair township is Asian, with 0.94% 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 11.01%, and for those that did not work, the poverty rate was 17.95%.
Married
Widowed
Divorced
Separated
NeverMarried
48.4%
Overall Marriage Rate
49.8%
Male Marriage Rate
46.9%
Female Marriage Rate
male
female
The age group where males are most likely to be married is 55-64, while the female age group most likely to be married is 55-64.
Married
Widowed
Divorced
Separated
NeverMarried
Less Than 9th Grade
High School Graduate
Some College
Bachelors or Greater
1.57%
Veteran Poverty Rate
25.96%
Veteran Disability Rate
LaborForceParticipation
65.6%
Labor Force Participation
61.9%
Employment Rate
4.4%
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
56.66%
Born in St. Clair township
95.48%
Native Born
4.52%
Foreign Born
1.21%
Non Citizen
3.31%
Naturalized
95.48% of St. Clair township residents were born in the United States, with 56.66% having been born in Illinois. 1.21% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Asia.
Year | Population | Growth | Growth Rate |
|---|---|---|---|
| 2029 | 37,626 | 330 | 0.88% |
| 2028 | 37,296 | 330 | 0.89% |
| 2027 | 36,966 | 330 | 0.9% |
| 2026 | 36,636 | 330 | 0.91% |
| 2025 | 36,306 | 330 | 0.92% |
| 2024 | 35,976 | 330 | 0.93% |
| 2023 | 35,646 | 330 | 0.93% |
| 2022 | 35,316 | -251 | -0.71% |
| 2021 | 35,567 | -137 | -0.38% |
| 2020 | 35,704 | 611 | 1.74% |
| 2019 | 35,093 | -3 | -0.01% |
| 2018 | 35,096 | -151 | -0.43% |
| 2017 | 35,247 | -66 | -0.19% |
| 2016 | 35,313 | -96 | -0.27% |
| 2015 | 35,409 | -201 | -0.56% |
| 2014 | 35,610 | -139 | -0.39% |
| 2013 | 35,749 | -166 | -0.46% |
| 2012 | 35,915 | -90 | -0.25% |
| 2011 | 36,005 | 145 | 0.4% |
| 2010 | 35,860 | 0 | 0% |