Saint Louis, MO Profile: Facts & Data


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Saint Louis, Missouri - Basic Facts

The City of Saint Louis is the 2nd largest city in Missouri with a population of 313,929 as of July 1, 2020. Saint Louis 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 Saint Louis is located at latitude 38.6273 and longitude -90.1979 in St. Louis (city) County. The formal boundaries for the City of Saint Louis encompass a land area of 61.95 sq. miles and a water area of 4.12 sq. miles. St. Louis (city) County is in the Central time zone (GMT -6). The elevation is 466 feet.

The City of Saint Louis (GNIS ID: 767557) has a C7 Census Class Code which indicates an incorporated place that is independent of any county. It also has a Functional Status Code of "A" which identifies an active government providing primary general-purpose functions.

Alternate Unofficial Names for Saint Louis: City of Saint Louis, Lacledes Village, Mound City, Pain Court, Pancore, Saint Lewis, Saint Louis City.


Saint Louis, MO Data & Demographics (As of July 1, 2020)


Total Population 313,929 (100%)
Population in Households 302,378 (96.3%)
Population in Families 200,006 (63.7%)
Population in Group Quarters1 11,551 ( 3.7%)
Population Density 5,084
Diversity Index2 61


Median Household Income $44,454
Average Household Income $67,816
% of Income for Mortgage4 14%
Per Capita Income $30,747
Wealth Index5 54


Total HU (Housing Units) 175,956 (100%)
Owner Occupied HU 62,655 (35.6%)
Renter Occupied HU 78,827 (44.8%)
Vacant Housing Units 34,474 (19.6%)
Median Home Value $147,366
Average Home Value $194,135
Housing Affordability Index3 164


Total Households 141,482
Average Household Size 2.14
Family Households 65,609
Average Family Size 3
  1. Group Quarters - a place where people live or stay in a group living arrangement. Includes college residents halls, nursing facilities, military barracks, and correctional facilities.
  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 races 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.
  3. The Housing Affordability Index base is 100 and represents a balance point where a resident with a median household income can normally qualify to purchase a median price home. Values above 100 indicate increased affordability, while values below 100 indicate decreased affordability.
  4. The % of Income for Mortgage quantifies the percentage of median household income dedicated to mortgage payments on a home priced at the median value (assuming a 30-year mortgage and a 20% down payment).
  5. The Wealth Index is based on a number of indicators of affluence including average household income and average net worth, but it also includes the value of material possessions and resources. It represents the wealth of the area relative to the national level. Values above or below 100 represent above-average wealth or below-average wealth compared to the national level.


2010-2020 2020-2025
Population -0.16% -0.2%
Households -0.04% -0.13%
Families -0.27% -0.29%
Median Household Income   1.55%
Per Capita Income   2.28%
Owner Occupied HU   -0.4%


Saint Louis, MO - Peer Comparisons by Rank and Percentile

The table below compares Saint Louis to the other 1,032 incorporated cities, towns and CDPs in Missouri by rank and percentile using July 1, 2020 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 # 2 100th
Population Density # 25 98th
Median Household Income # 594 43rd
Housing Affordability Index # 303 29th
Per Capita Income # 212 80th
Diversity Index # 21 98th

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

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