St John city, MO Profile: Facts, Map & Data


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St John city, Missouri - Basic Facts

The City of Saint John had a population of 6,640 as of July 1, 2017. St John city ranks in the upper quartile for Population Density and Diversity Index when compared to the other cities, towns and Census Designated Places (CDPs) in Missouri. See peer rankings below.

The primary coordinate point for St John city is located at latitude 38.7148 and longitude -90.3463 in St. Louis County. The formal boundaries for the City of Saint John (see map below) encompass a land area of 1.42 sq. miles and a water area of 0 sq. miles.

The City of Saint John (GNIS ID: 2396495) has a C1 Census Class Code which indicates an active incorporated place that does not serve as a county subdivision equivalent. It also has a Functional Status Code of "A" which identifies an active government providing primary general-purpose functions.

The City of Saint John is located within Township of Midland, a minor civil division (MCD) of St. Louis County.

Beneath the boundary map are tables with St John city population, income and housing data, five-year growth projections and peer comparisons for key demographic data. The estimates are for July 1, 2017.

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City of Saint John, MO Boundary Map

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St John city, MO Data & Demographics (As of July 1, 2017)


Total Population 6,640
Daytime Population: Workers 3,449
Daytime Population: Residents 3,309
Total Daytime Population (TDP) 6,758
Ratio TDP/Total Population1 1.02
Population in Households 6,561
Population in Familes 5,090
Population in Group Qrtrs 79
Population Density2 4,681
Diversity Index3 60


Median Household Income $43,451
Average Household Income $53,578
Per Capita Income $21,673


Total Housing Units 2,961 (100%)
Owner Occupied HU 1,877 (63.4%)
Renter Occupied HU 787 (26.6%)
Vacant Housing Units 297 (10.0%)
Median Home Value $83,797
Average Home Value $97,190


Total Households 2,664
Average Household Size 2.46
Family Households 1,671
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 0.26% 0.22%
Households 0.21% 0.2%
Families 0.11% 0.1%
Median Household Income   1.45%
Per Capita Income   2.38%

St John city, MO - Peer Comparisons by Rank and Percentile

The table below compares St John city to the other 1,032 incorporated cities, towns and CDPs 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 # 119 89th
Population Density # 31 97th
Diversity Index # 22 98th
Median Household Income # 496 52nd
Per Capita Income # 588 43rd

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

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