Clayton

County:: St. Louis County
County Seat:: Yes
Area (mi²):: 2.507
State:: Missouri

Clayton is a city located in St. Louis County, Missouri. Clayton has a 2025 population of 17,537. It is also the county seat of St. Louis County. Clayton is currently growing at a rate of 0.22% annually and its population has increased by 1.1% since the most recent census, which recorded a population of 17,347 in 2020.

The average household income in Clayton is $216,884 with a poverty rate of 8.14%. The median age in Clayton is 28.7 years: 28.8 years for males, and 28.3 years for females.

Demographics

The racial composition of Clayton includes 69.19% White, 12.68% Asian, 8.89% Black or African American, and smaller percentages for other race, Native American, Native Hawaiian or Pacific Islander and multiracial populations.

Population by Race

White

Asian

Black or African American

Two or more races

Other race

Native American

Native Hawaiian or Pacific Islander

Race	Population	Percentage (of total)
White	11,957	69.19%
Asian	2,191	12.68%
Black or African American	1,537	8.89%
Two or more races	1,353	7.83%
Other race	223	1.29%
Native American	21	0.12%
Native Hawaiian or Pacific Islander	0	0%

Clayton Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Clayton's average per capita income is $92,351. Household income levels show a median of $128,898. The poverty rate stands at 8.14%.

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	$230,682	-
Families	$190,550	$306,470
Households	$128,898	$216,884
Non Families	$75,772	$112,188

$92,351

Average Income

$128,898

Median Household Income

8.14%

Poverty Rate