St. Clair township Flag

St. Clair township

County Seat:
No
Area (mi²):
20.364
State:
Illinois

St. Clair township is located in St. Clair County, Illinois. St. Clair township has a 2025 population of 36,306. St. Clair township is currently growing at a rate of 0.92% annually and its population has increased by 1.69% since the most recent census, which recorded a population of 35,704 in 2020.

The average household income in St. Clair township is $100,837 with a poverty rate of 10.97%.The median age in St. Clair township is 40.9 years: 38.5 years for males, and 43.4 years for females.

36.3K
Total Population
1,783
Density (mi²)
330 0.92%
Growth

St. Clair township Population

St. Clair township Population

Data after 2023 is projected based on recent change

35K35.5K36K36.5K37K37.5K2010201220142016201820202022202420262028YearPopulation

Demographics

The racial composition of St. Clair township includes 65.76% White, 23.93% Black or African American, and smaller percentages for Asian, other race, Native American and multiracial populations.

Population by Race

65.76%23.93%5.22%
Race
Population
Percentage (of total)
White23,41265.76%
Black or African American8,51823.93%
Two or more races1,8595.22%
Asian1,0212.87%
Other race6381.79%
Native American1540.43%

St. Clair township Marital Status

OverallMalesFemales0%10%20%30%40%50%60%70%80%90%100%

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

St. Clair township's average per capita income is $51,236. Household income levels show a median of $76,643. The poverty rate stands at 10.97%.

Families: A family includes the owner or renter of the home along with everyone related to them - whether through birth, marriage, or adoption. This includes relatives like spouses, children, parents, siblings, grandparents, and any other family members.
Households: A household includes all the people who occupy a housing unit (such as a house or apartment) as their usual place of residence.
Non Families: A nonfamily household is either someone living alone or when the owner/renter lives with people they aren't related to, like roommates.
Name
Median
Mean
Married Families$125,183-
Families$108,474$129,681
Households$76,643$100,837
Non Families$42,108$53,034

$51,236

Average Income

$76,643

Median Household Income

10.97%

Poverty Rate

Nearby Cities

Sources

  1. US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
  3. American Community Survey (2009 - 2013)
  4. Census QuickFacts
  5. Historical Populations of States and Counties (1790 - 1990)