St. Clair

County:: Franklin County
County Seat:: No
Area (mi²):: 4.808
State:: Missouri

St. Clair is a city located in Franklin County, Missouri. St. Clair has a 2025 population of 4,662. St. Clair is currently declining at a rate of -0.58% annually and its population has decreased by -2.81% since the most recent census, which recorded a population of 4,797 in 2020.

The average household income in St. Clair is $55,438 with a poverty rate of 16.76%.The median age in St. Clair is 38.1 years: 34.1 years for males, and 43.5 years for females.

Demographics

The racial composition of St. Clair includes 92.87% White, and smaller percentages for Black or African American, other race, Asian and multiracial populations.

Population by Race

Race	Population	Percentage (of total)
White	4,427	92.87%
Two or more races	259	5.43%
Black or African American	37	0.78%
Other race	25	0.52%
Asian	19	0.4%

St. Clair Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

St. Clair's average per capita income is $36,972. Household income levels show a median of $40,933. The poverty rate stands at 16.76%.

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	$60,417	-
Families	$42,309	$62,743
Households	$40,933	$55,438
Non Families	$29,016	$37,264

$36,972

Average Income

$40,933

Median Household Income

16.76%

Poverty Rate