Cost of living in Lake St. Louis, MO

Lake St. Louis is a Census city in St. Charles County, MO. ACS 2024 5-year population is 18,066. Median gross rent is $1,588 (ACS 2024 5-year, this place). Median home value is $405,900. Median household income is $125,693. Insurance is the NAIC state average; food is a USDA plan — no town indexes.