Lake St. Louis Flag

Lake St. Louis

County Seat:
No
Area (mi²):
10.778
State:
Missouri

Lake St. Louis is located in St. Charles County, Missouri. Lake St. Louis has a 2025 population of 30,038 . Lake St. Louis is currently declining at a rate of 0% annually and its population has decreased by 0% since the most recent census, which recorded a population of 0 in 2020.

The average household income in Lake St. Louis is $134,247 with a poverty rate of 5.01%. The median age in Lake St. Louis is 40.6 years: 39.6 years for males, and 42.2 years for females. For every 100 females there are 95.3 males.

30K
Total Population
2,787
Density (mi²)

Lake St. Louis Population

Lake St. Louis Population

Data after 2023 is projected based on recent change

Demographics

The racial composition of Lake St. Louis includes 86.31% White, 5.05% Black or African American, and smaller percentages for Asian, other race, Native American and multiracial populations.

Population by Race

White (86.31%)

Two or more races (5.38%)

Black or African American (5.05%)

Asian (2.15%)

Other race (1.07%)

Native American (0.04%)

Race
Population
Percentage (of total)
White25,92786.31%
Two or more races1,6165.38%
Black or African American1,5185.05%
Asian6452.15%
Other race3201.07%
Native American120.04%

Lake St. Louis Marital Status

OverallMalesFemales0%10%20%30%40%50%60%70%80%90%100%

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Lake St. Louis' average per capita income is $64,803. Household income levels show a median of $111,863. The poverty rate stands at 5.01%.

Families: A family includes the owner or renter of the home along with everyone related to them - whether through birth, marriage, or adoption. This includes relatives like spouses, children, parents, siblings, grandparents, and any other family members.
Households: A household includes all the people who occupy a housing unit (such as a house or apartment) as their usual place of residence.
Non Families: A nonfamily household is either someone living alone or when the owner/renter lives with people they aren't related to, like roommates.
Name
Median
Mean
Married Families$154,939-
Families$141,385$158,500
Households$111,863$134,247
Non Families$50,644$71,916

$64,803

Average Income

$111,863

Median Household Income

5.01%

Poverty Rate

Nearby Cities

Sources

  1. US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
  3. American Community Survey (2009 - 2013)
  4. Census QuickFacts
  5. Historical Populations of States and Counties (1790 - 1990)