Census place · GEOID 2940043 · St. Charles County
Lake St. Louis, MO ZIP codes
3 ZIP/ZCTAs intersecting this Census place in St. Charles County.
U.S. Census Bureau, ACS 2019–2023 5-year (vintage 2023). Geography: Census place Lake St. Louis (GEOID 2940043). Methodology
Combined population of ZIP/ZCTAs intersecting this place: 128,204 (3 ZIPs).
Combined population of ZIP/ZCTAs intersecting this place. Each intersecting ZIP contributes its full ZCTA population; overlap percents are descriptive only. This is not the Census place ACS headline above. Methodology
Map of Lake St. Louis, MO

ZIP/ZCTA overlap with Lake St. Louis
Population overlap
Share of each ZIP/ZCTA’s population located within Lake St. Louis, based on ZIP Code Database place-overlap data. This is a population measure, not land-area overlap or the Census-place population.
ZIP Code Database place-overlap table, field percent_of_zip_population_in_place, keyed by place_geoid. Not ACS 2019–2023. Overlap vintage is the shipped overlap table and is separate from ACS. Methodology
ZIP codes intersecting Lake St. Louis
| ZIP | City | County | Population | Income |
|---|---|---|---|---|
| 63366 | O Fallon | St. Charles County | 54,449 | $98,237 |
| 63367 | Lake Saint Louis | St. Charles County | 27,893 | $134,932 |
| 63368 | O Fallon | St. Charles County | 45,862 | $118,811 |