Lake Saint Louis, MO Profile: Facts & Data


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Lake Saint Louis, Missouri - Basic Facts

The City of Lake Saint Louis had a population of 16,475 as of July 1, 2018. Lake Saint Louis ranks in the upper quartile for Population Density when compared to the other cities, towns and Census Designated Places (CDPs) in Missouri. See peer rankings below.

The primary coordinate point for Lake Saint Louis is located at latitude 38.7976 and longitude -90.7857 in St. Charles County. The formal boundaries for the City of Lake Saint Louis encompass a land area of 8.03 sq. miles and a water area of 0.81 sq. miles. St. Charles County is in the Central time zone (GMT -6). The elevation is 564 feet.

The City of Lake Saint Louis (GNIS ID: 2395600) 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 Lake Saint Louis is located within Township of Lake Saint Louis, a minor civil division (MCD) of St. Charles County.

Jump to... (On This Page!)
  1. Lake Saint Louis 2018 Demographic Data
  2. Growth Rates for Lake Saint Louis (Historical & 5-Year Forecast)
  3. Peer Comparisons (Rank and Percentile)
  1. Neighborhoods Demographics (Home Values, Household Income, etc.)
  2. Missouri Research Tools (Easy Tools & Current Data)
  3. Missouri Data Comparison Tool - 2018 Demographics

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Lake Saint Louis, MO Data & Demographics (As of July 1, 2018)


Total Population 16,475
Population in Households 16,475
Population in Familes 14,046
Population in Group Qrtrs 0
Population Density2 2,052
Diversity Index3 21


Median Household Income $90,189
Average Household Income $114,308
Per Capita Income $44,582


Total Housing Units 7,003 (100%)
Owner Occupied HU 5,461 (78.0%)
Renter Occupied HU 1,135 (16.2%)
Vacant Housing Units 407 ( 5.8%)
Median Home Value $278,231
Average Home Value $324,405


Total Households 6,596
Average Household Size 2.5
Family Households 4,842
Average Family Size 3
  1. Demographics are point estimates for July 1st of the current year and each for the forecast years. See References for more information.
  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.


2010-2018 2018-2023
Population 1.51% 1.5%
Households 1.53% 1.53%
Families 1.69% 1.44%
Median Household Income   2.59%
Per Capita Income   2.69%

Lake Saint Louis, MO - Peer Comparisons by Rank and Percentile

The table below compares Lake Saint Louis to the other 1,032 incorporated cities, towns and CDPs 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 # 52 95th
Population Density # 105 90th
Diversity Index # 266 74th
Median Household Income # 33 97th
Per Capita Income # 38 96th

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

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Missouri Census Data Comparison Tool

Compare Missouri July 1, 2018 Data
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