Lakes / Missouri / Washington County / Hornsey Lake
Hornsey Lake, Missouri
73.88 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - Missouri
37.93 degrees N, 90.81 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 Hornsey Lake Stacks Up
- Larger than 62% of the 352 lakes counted in Missouri.
- About 59 miles from St. Louis, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Hornsey Brothers Lake | Washington | 3.6 mi | 48.93 acres |
| Keyes Branch Mine Tailings Pond | Washington | 4.0 mi | 54.04 acres |
| Sunnen Lake | Washington | 6.2 mi | 212.13 acres |
| Apex Lake | Washington | 7.2 mi | 48.11 acres |
| Sayersbrook Lake | Washington | 7.6 mi | 44.8 acres |
| Palmer Lake | Washington | 9.3 mi | 103.06 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Hornsey Lake
How Big Is Hornsey Lake?
Hornsey Lake covers 73.88 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 43890765). Verified October 30, 2026.