Clayton Flag

Clayton

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.

17.5K
Total Population
6,995
Density (mi²)
38 0.22%
Growth

Clayton Population

Clayton Population

Data after 2023 is projected based on recent change

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 and multiracial populations.

Population by Race

Race
Population
Percentage (of total)
White11,95769.19%
Asian2,19112.68%
Black or African American1,5378.89%
Two or more races1,3537.83%
Other race2231.29%
Native American210.12%

Clayton Marital Status

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

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

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)