Lake Saint Louis, MO Profile: Facts, Map & Data


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Lake Saint Louis, Missouri - Basic Facts

The City of Lake Saint Louis had a population of 16,109 as of July 1, 2017. Lake 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 Lake Saint Louis is located at latitude 38.7822 and longitude -90.7866 in St. Charles County. The formal boundaries for the City of Lake Saint Louis (see map below) 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.

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

Neighborhood Data

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City of Lake Saint Louis, MO Boundary Map

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Boundary Maps: Township of Lake Saint Louis | St. Charles County | Missouri Counties

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Lake Saint Louis, MO Data & Demographics (As of July 1, 2017)


Total Population 16,109
Daytime Population: Workers 6,709
Daytime Population: Residents 8,032
Total Daytime Population (TDP) 14,741
Ratio TDP/Total Population1 0.92
Population in Households 16,109
Population in Familes 13,755
Population in Group Qrtrs 0
Population Density2 2,006
Diversity Index3 21


Median Household Income $84,664
Average Household Income $110,778
Per Capita Income $43,303


Total Housing Units 6,846 (100%)
Owner Occupied HU 5,103 (74.5%)
Renter Occupied HU 1,353 (19.8%)
Vacant Housing Units 390 ( 5.7%)
Median Home Value $267,933
Average Home Value $317,716


Total Households 6,456
Average Household Size 2.5
Family Households 4,735
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 1.41% 1.32%
Households 1.44% 1.38%
Families 1.61% 1.28%
Median Household Income   2.7%
Per Capita Income   2.48%

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, 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 # 55 95th
Population Density # 106 90th
Diversity Index # 261 75th
Median Household Income # 36 97th
Per Capita Income # 36 97th

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

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