Lake St. Louis
In St. Charles County, Missouri — population 17,186 as of 2020.
Scopes news, events and the map to Lake St. Louis. No account needed — we keep it on this device.
Your city
Change city
News, events and the map open here. Kept on this device.
is your city now — Lake St. Louis would replace it. We'll ask first.
stops being your city.
Lake St. Louis takes over news, events and the map.
Overnight
69°F
Mostly Clear6% precip
Saturday
86°F
Sunny1% precip
Saturday Night
63°F
Mostly Clear1% precip
Sunday
83°F
Mostly Sunny
You know Lake St. Louis better than we do.
Add the places people actually go. Our editors review submissions before they publish — you'll need an account with access to send one.
Lake St. Louis by the numbers
Population
17,186Population figure, 2020
Households & income
- Area
- 8.54 sq mi (22.12 km²), 0.81 sq mi water
- Median age
- 42.7
- Households
- 7,351
- Persons per household
- 2.5
- Median household income
- $125,693
- Median house value
- $405,900
Municipal office
- Office
- CITY ADMINISTRATOR
- Address
- 200 CIVIC CENTER DR, LAKE ST LOUIS, MO 63367