Lake St. Louis Flag

Lake St. Louis

County Seat:
No
Area (mi²):
8.54
State:
Missouri

Lake St. Louis is a city located in St. Charles County, Missouri. Lake St. Louis has a 2026 population of 19,160. Lake St. Louis is currently growing at a rate of 2.4% annually and its population has increased by 14.12% since the most recent census, which recorded a population of 16,789 in 2020.

19.2K
Total Population
2,243
Density (mi²)
449 2.4%
Growth

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)