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 2026 population of 17,588. 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 1.32% since the most recent census, which recorded a population of 17,359 in 2020.

The median household income in Clayton is $123,000 with a poverty rate of 7.97%. The median age in Clayton is 30 years: 29.1 years for males, and 30.6 years for females. For every 100 females there are 102.4 males.

17.6K
Total Population
7,016
Density (mi²)
38 0.22%
Growth

Clayton Population

Clayton Population

Data after 2023 is projected based on recent change

Year ↓
Population
Growth
Annual Change
202617,588380.22%
202517,550380.22%
202417,512-6-0.03%
202317,5183672.14%
202217,151-156-0.9%
202117,307-59-0.34%
202017,3595963.56%
201916,763-28-0.17%
201816,791-44-0.26%
201716,8351691.01%
201616,6667474.69%
201515,919-6-0.04%
201415,925-7-0.04%
201315,932-30-0.19%
201215,962-12-0.08%
201115,97400%
201015,974350.22%
200012,825-1,049-7.56%
199013,874-432-3.02%
198014,306-1,794-11.14%
197016,1008555.61%
196015,245-790-4.93%
195016,0352,96622.69%
194013,0693,45635.95%
19309,6136,585217.47%
19203,02800%

Median Age

Overall: 30 years
Female: 30.6 years
Male: 29.1 years

Clayton Adults

There are 14,310 adults, (2,418 of whom are seniors) in Clayton.

Sex Ratio

Female: 8,588 (49.4%)
Male: 8,792 (50.6%)

Demographics

The racial composition of Clayton includes 67.51% White, 13.27% Asian, 8.81% Black or African American, and smaller percentages for other race, Native American and multiracial populations.

Population by Race

Race
Population ↓
Percentage (of total)
White11,73467.51%
Asian2,30613.27%
Two or more races1,5849.11%
Black or African American1,5318.81%
Other race1690.97%
Native American560.32%
Race
Population ↓
Percentage (of total)
Two or more races3722.14%
White1620.93%
Other race820.47%
Black or African American210.12%
Native American70.04%
Race
Population ↓
Percentage (of total)
White11,57266.58%
Asian2,30613.27%
Black or African American1,5108.69%
Two or more races1,2126.97%
Other race870.5%
Native American490.28%

Clayton Marital Status

Economics and Income Statistics

Clayton 's average per capita income is $93,182. Household income levels show a median of $123,000. The poverty rate stands at 7.97%.

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$217,024-
Families$190,368$298,948
Households$123,000$205,487
Non Families$73,958$107,326

$93,182

Average Income

$123,000

Median Household Income

7.97%

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)