Demographics in Lake St. Louis, MO

Population, age, race, ethnicity, and household statistics — 2023 ACS Data

Where is Lake St. Louis?

Loading map…

Population

Source: U.S. Census Bureau ACS (2023)

Total Population

17,538

Male

8,696

49.6%

Female

8,842

50.4%

Median Age

43.2

Race & Ethnicity

Source: U.S. Census Bureau ACS (2023)

White

87.6%

Black

4.2%

Hispanic

2.8%

Asian

1.6%

Two or More

5.6%

Other

1.0%

Education & Household

Source: U.S. Census Bureau ACS (2023)

Bachelor's or Higher

34.5%

High School or Higher

46.1%

Foreign Born

3.8%

Veterans

7.3%

Married

52.5%

Avg Household Size

2.4

Marital Status by Age

Source: U.S. Census Bureau ACS (2023)

Lake St. Louis, MO has a population of 17,538 with a median age of 43.2. The racial makeup is 87.6% White, 2.8% Hispanic, 4.2% Black, 1.6% Asian. About 34.5% of residents hold a bachelor's degree or higher. The foreign-born population is 3.8%.