Clayton, MO Profile: Facts, Map & Data


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Clayton, Missouri - Basic Facts

The City of Clayton had a population of 16,873 as of July 1, 2018. Clayton ranks in the upper quartile for Population Density and Diversity Index when compared to the other cities, towns and Census Designated Places (CDPs) in Missouri. See peer rankings below.

The primary coordinate point for Clayton is located at latitude 38.6443 and longitude -90.3301 in St. Louis County. The formal boundaries for the City of Clayton (see map below) encompass a land area of 2.48 sq. miles and a water area of 0 sq. miles. St. Louis County is in the Central time zone (GMT -6). The elevation is 564 feet.

The City of Clayton (GNIS ID: 2393548) has a C1 Census Class Code which indicates an active incorporated place that does not serve as a county subdivision equivalent. It also has a Functional Status Code of "A" which identifies an active government providing primary general-purpose functions.

The City of Clayton is located within Township of Clayton, a minor civil division (MCD) of St. Louis County.

Beneath the boundary map are tables with Clayton population, income and housing data, five-year growth projections and peer comparisons for key demographic data. The estimates are for July 1, 2018.

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City of Clayton, MO Boundary Map

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Clayton, MO Data & Demographics (As of July 1, 2018)


Total Population 16,873
Population in Households 12,149
Population in Familes 8,824
Population in Group Qrtrs 4,724
Population Density2 6,810
Diversity Index3 48


Median Household Income $109,271
Average Household Income $169,745
Per Capita Income $63,018


Total Housing Units 6,957 (100%)
Owner Occupied HU 3,044 (43.8%)
Renter Occupied HU 2,687 (38.6%)
Vacant Housing Units 1,226 (17.6%)
Median Home Value $670,947
Average Home Value $763,863


Total Households 5,731
Average Household Size 2.12
Family Households 3,100
Average Family Size 3
  1. If the ratio of the TDP to Total Population is greater than 1, the location gains population during the day when commuting workers are present. If the ratio is less than 1, the location is more of a bedroom community where people commute to another place for work.
  2. Population Density = Total Population per square mile.
  3. The Diversity Index is a scale of 0 to 100 that represents the likelihood that two persons, chosen at random from the same area, belong to different race or ethnic groups. If an area's entire population belongs to one race AND one ethnic group, then the area has zero diversity. An area's diversity index increases to 100 when the population is evenly divided into two or more race/ethnic groups.


2010-2017 2017-2022
Population 0.69% 1.22%
Households 0.9% 1.67%
Families 0.72% 1.54%
Median Household Income   1.7%
Per Capita Income   2.09%

Clayton, MO - Peer Comparisons by Rank and Percentile

The table below compares Clayton to the other 1,032 incorporated cities, towns and CDPs in Missouri by rank and percentile using July 1, 2018 data. The location Ranked # 1 has the highest value. A location that ranks higher than 75% of its peers would be in the 75th percentile of the peer group.

Variable Description Rank Percentile
Total Population # 48 95th
Population Density # 9 99th
Diversity Index # 60 94th
Median Household Income # 20 98th
Per Capita Income # 16 99th

Additional comparisons and rankings can be made with a VERY EASY TO USE Missouri Census Data Comparison Tool.

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