St. Louis County MO Information


St. Louis County Subdivisions

St. Louis County MO Data & Demographics (As of July 1, 2018)


Total Population 1,012,817
Population in Households 993,401
Population in Familes 796,075
Population in Group Qrtrs 19,416
Population Density1 1,995
Diversity Index2 51


Median Household Income $65,250
Average Household Income $96,821
Per Capita Income $39,442


Total Housing Units 443,373 (100%)
Owner Occupied HU 276,750 (62.4%)
Renter Occupied HU 131,754 (29.7%)
Vacant Housing Units 34,869 ( 7.9%)
Median Home Value $199,598
Average Home Value $272,210


Total Households 408,504
Average Household Size 2.43
Family Households 263,005
Average Family Size 3
  1. Population Density = Total Population per square mile.
  2. 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 0.17% 0.19%
Households 0.11% 0.15%
Families -0.02% 0.06%
Median Household Income   2.88%
Per Capita Income   2.42%


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, 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 # 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.