Lakes / Missouri / St. Charles County / Lake Saint Louis
Lake Saint Louis, Missouri
444.3 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - Missouri
38.80 degrees N, 90.78 degrees W - St. Charles County. State and county outlines drawn from Census boundary data; the lake marker is placed by its USGS National Hydrography Dataset coordinates, not by eye. Schematic - not a survey map.
How Lake Saint Louis Stacks Up
- Larger than 93% of the 352 lakes counted in Missouri.
- The largest lake in St. Charles County among those counted.
- About 33 miles from St. Louis, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Lake Saint Louise | St. Charles | 0.9 mi | 71.41 acres |
| Kraut Run Lake | St. Charles | 4.3 mi | 164.08 acres |
| August A Busch Lake Number 34 | St. Charles | 5.5 mi | 34.1 acres |
| August A Busch Lake Number 37 | St. Charles | 5.8 mi | 29.9 acres |
| August A Busch Lake Number 35 | St. Charles | 6.1 mi | 50.16 acres |
| Grassy Lake | St. Charles | 6.5 mi | 51.15 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Lake Saint Louis
How Big Is Lake Saint Louis?
Lake Saint Louis covers 444.3 acres in St. Charles County, Missouri.
What Is the Largest Lake in St. Charles County?
Lake Saint Louis is the largest lake in St. Charles County, at 444.3 acres.
Largest Lakes in Missouri
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | Lake of the Ozarks | Camden | 51,171.75 acres | - |
| 2 | Harry S Truman Reservoir | Benton | 49,365.93 acres | - |
| 3 | Table Rock Lake | Stone | 41,777.86 acres | - |
| 4 | Stockton Lake | Cedar | 24,962.34 acres | - |
| 5 | Mark Twain Lake | Ralls | 18,362.33 acres | - |
All 352 Missouri lakes ranked by surface area
Sources: USGS National Hydrography Dataset (The National Map) lake data (ID 42881253). Verified October 30, 2026.