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, Native American, Native Hawaiian or Pacific Islander and multiracial populations.

Population by Race

White

Two or more races

Black or African American

Other race

Asian

Native American

Native Hawaiian or Pacific Islander

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%
Native American	0	0%
Native Hawaiian or Pacific Islander	0	0%

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