Lake St. Clair

County:: Franklin County
County Seat:: No
Area (mi²):: 0.724
State:: Missouri

Lake St. Clair is a CDP located in Franklin County, Missouri. Lake St. Clair has a 2025 population of 1,056. Lake St. Clair is currently growing at a rate of 7.1% annually and its population has increased by 52.6% since the most recent census, which recorded a population of 692 in 2020.

The average household income in Lake St. Clair is $74,858 with a poverty rate of 0%.The median age in Lake St. Clair is 35.2 years: 29 years for males, and 41.6 years for females.

Demographics

The racial composition of Lake St. Clair includes 87.61% White, 3.13% other race, and smaller percentages for and multiracial populations.

Population by Race

Race	Population	Percentage (of total)
White	587	87.61%
Two or more races	62	9.25%
Other race	21	3.13%

Lake St. Clair Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Lake St. Clair's average per capita income is $48,393. Household income levels show a median of $80,392. The poverty rate stands at 0%.

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	$81,833	-
Families	$81,194	$91,491
Households	$80,392	$74,858
Non Families	-	$40,903

$48,393

Average Income

$80,392

Median Household Income

0%

Poverty Rate