St. Louis County MO Information


St. Louis County Subdivisions

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


Total Population 1,013,355
Daytime Population: Workers 596,241
Daytime Population: Residents 513,867
Total Daytime Population (TDP) 1,110,108
Ratio TDP/Total Population1 1.10
Population in Households 993,939
Population in Familes 798,797
Population in Group Qrtrs 19,416
Population Density2 1,996
Diversity Index3 51


Median Household Income $62,547
Average Household Income $93,384
Per Capita Income $38,105


Total Housing Units 441,826 (100%)
Owner Occupied HU 285,261 (64.6%)
Renter Occupied HU 124,002 (28.1%)
Vacant Housing Units 32,563 ( 7.4%)
Median Home Value $194,399
Average Home Value $257,824


Total Households 409,263
Average Household Size 2.43
Family Households 263,311
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 0.2% 0.19%
Households 0.15% 0.16%
Families -0.01% 0.06%
Median Household Income   2.73%
Per Capita Income   2.13%


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

The table below compares St. Louis 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 # 1 100th
Population Density # 2 99th
Diversity Index # 4 97th
Median Household Income # 5 97th
Per Capita Income # 2 99th

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