Lakes / Missouri / Washington County / Sunnen Lake
Sunnen Lake, Missouri
212.13 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - Missouri
37.94 degrees N, 90.92 degrees W - Washington 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 Sunnen Lake Stacks Up
- Larger than 82% of the 352 lakes counted in Missouri.
- The largest lake in Washington County among those counted.
- About 61 miles from St. Louis, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Sayersbrook Lake | Washington | 3.2 mi | 44.8 acres |
| Hornsey Brothers Lake | Washington | 3.4 mi | 48.93 acres |
| Hornsey Lake | Washington | 6.2 mi | 73.88 acres |
| Parole Lake | Washington | 6.9 mi | 43.14 acres |
| Howell Lake | Washington | 7.4 mi | 27.96 acres |
| Palmer Lake | Washington | 8.4 mi | 103.06 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Sunnen Lake
How Big Is Sunnen Lake?
Sunnen Lake covers 212.13 acres in Washington County, Missouri.
What Is the Largest Lake in Washington County?
Sunnen Lake is the largest lake in Washington County, at 212.13 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 43890747). Verified October 30, 2026.