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.
Data after 2023 is projected based on recent change
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.
White (86.3%)
Two or more races (5.4%)
Black or African American (5.1%)
Asian (2.1%)
Other race (1.1%)
Native American (0.0%)
Race | Population | Percentage (of total) |
---|---|---|
White | 25,927 | 86.31% |
Two or more races | 1,616 | 5.38% |
Black or African American | 1,518 | 5.05% |
Asian | 645 | 2.15% |
Other race | 320 | 1.07% |
Native American | 12 | 0.04% |
Married
Widowed
Divorced
Separated
Never Married
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%.
Name | Median | Mean |
---|---|---|
Married Families | $154,939 | - |
Families | $141,385 | $158,500 |
Households | $111,863 | $134,247 |
Non Families | $50,644 | $71,916 |
Average Income
Median Household Income
Poverty Rate