St. Charles County MO Information


St. Charles County Subdivisions

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


Total Population 396,448
Daytime Population: Workers 142,855
Daytime Population: Residents 192,207
Total Daytime Population (TDP) 335,062
Ratio TDP/Total Population1 0.85
Population in Households 391,008
Population in Familes 331,570
Population in Group Qrtrs 5,440
Population Density2 707
Diversity Index3 26


Median Household Income $75,939
Average Household Income $93,397
Per Capita Income $35,160


Total Housing Units 154,943 (100%)
Owner Occupied HU 116,378 (75.1%)
Renter Occupied HU 31,732 (20.5%)
Vacant Housing Units 6,833 ( 4.4%)
Median Home Value $211,575
Average Home Value $239,659


Total Households 148,110
Average Household Size 2.64
Family Households 106,718
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 1.32% 1.41%
Households 1.36% 1.44%
Families 1.24% 1.36%
Median Household Income   1.82%
Per Capita Income   2.53%


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

The table below compares St. Charles 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 # 3 98th
Population Density # 4 97th
Diversity Index # 28 77th
Median Household Income # 1 100th
Per Capita Income # 3 98th

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