St. Louis County MO Information


St. Louis County Subdivisions

St. Louis County MO Data & Demographics (As of July 1, 2015)


Total Population 992,913
Population in Households 973,492
Population in Familes 785,528
Population in Group Qrtrs 19,421
Population Density1 1,955
Diversity Index2 50


Total Households 405,174
Average Household Size 2.4
Family Households 261,704
Average Family Size 3


Total Housing Units 440,374 (100%)
Owner Occupied HU 288,478 (65.5%)
Renter Occupied HU 116,696 (26.5%)
Vacant Housing Units 35,200 ( 8.0%)
Median Home Value $206,365
Average Home Value $277,258


Median Household Income $58,247
Average Household Income $86,878
Per Capita Income $35,656
  (Compound Annual Growth Rates)


2010-2015 2015-2020
Population -0.12% 0.02%
Households 0.02% 0.06%
Families -0.12% -0.03%
Median Household Income   3.22%
Per Capita Income   2.78%
1) Population Density = Total Population per square mile.
2) The Diversity Index is a scale of 0 to 100 that represents the likelyhood 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.
Based on Census 2010 counts, the Diversity Index for the United States was 60.6 and it is expected to increase to 64.8 by July 1, 2018.


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, 2015 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 Density1 # 2 99th
Diversity Index2 # 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.