Lakes / South Dakota / Shannon County / Denby Lake
Denby Lake, South Dakota
27.43 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - South Dakota
43.05 degrees N, 102.31 degrees W - Shannon 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 Denby Lake Stacks Up
- Larger than 2% of the 533 lakes counted in South Dakota.
- About 84 miles from Rapid City, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Lee Lake | Shannon | 1.1 mi | 39.04 acres |
| Wakpamani Lake | Shannon | 8.4 mi | 64.99 acres |
| Two Lance Lake | Shannon | 10 mi | 33.36 acres |
| Alkali Lake | Shannon | 12 mi | 311.03 acres |
| Ross Lake | Bennett | 16 mi | 39.04 acres |
| Ecoffey Lake | Bennett | 17 mi | 58.81 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Denby Lake
How Big Is Denby Lake?
Denby Lake covers 27.43 acres in Shannon County, South Dakota.
What Is the Largest Lake in Shannon County?
Oglala Lake is the largest lake in Shannon County, at 549.32 acres.
Largest Lakes in South Dakota
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | Lake Oahe | Dewey | 309,912.57 acres | - |
| 2 | Lake Francis Case | Charles Mix | 82,166.92 acres | - |
| 3 | Lake Sharpe | Hughes | 58,419.67 acres | - |
| 4 | Lewis and Clark Lake | Bon Homme | 25,141.99 acres | - |
| 5 | Lake Thompson | Kingsbury | 13,887.93 acres | - |
All 533 South Dakota lakes ranked by surface area
Sources: USGS National Hydrography Dataset (The National Map) lake data (ID 126553039). Verified October 30, 2026.