St. Louis (city) County MO Information


St. Louis (city) County Subdivisions

St. Louis (city) County MO Data & Demographics (As of July 1, 2017)


Total Population 316,260
Daytime Population: Workers 266,570
Daytime Population: Residents 167,866
Total Daytime Population (TDP) 434,436
Ratio TDP/Total Population1 1.37
Population in Households 304,302
Population in Familes 202,156
Population in Group Qrtrs 11,958
Population Density2 5,109
Diversity Index3 61


Median Household Income $37,980
Average Household Income $56,308
Per Capita Income $25,649


Total Housing Units 178,154 (100%)
Owner Occupied HU 59,915 (33.6%)
Renter Occupied HU 81,087 (45.5%)
Vacant Housing Units 37,152 (20.9%)
Median Home Value $134,973
Average Home Value $171,782


Total Households 141,002
Average Household Size 2.16
Family Households 65,843
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 -0.13% -0.25%
Households -0.1% -0.24%
Families -0.34% -0.4%
Median Household Income   2.56%
Per Capita Income   3.23%


St. Louis (city) County MO - Peer Comparisons by Rank and Percentile

The table below compares St. Louis (city) County to the other 115 counties and county equivalents in Missouri by rank and percentile using July 1, 2017 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 # 4 97th
Population Density # 1 100th
Diversity Index # 1 100th
Median Household Income # 82 30th
Per Capita Income # 22 82nd

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