Lakes / South Dakota / Bennett County / Deadmans Lake
Deadmans Lake, South Dakota
185.06 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - South Dakota
43.20 degrees N, 101.56 degrees W - Bennett 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 Deadmans Lake Stacks Up
- Larger than 62% of the 533 lakes counted in South Dakota.
- About 101 miles from Pierre, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Little White River Pool Reservoir | Bennett | 3.6 mi | 569.08 acres |
| White Lake | Bennett | 5.0 mi | 275.35 acres |
| Twin Lakes | Bennett | 6.3 mi | 132.45 acres |
| Silver Lake | Bennett | 7.5 mi | 86.24 acres |
| Phantom Lake | Bennett | 12 mi | 55.02 acres |
| Scotchman Lake | Bennett | 14 mi | 77.42 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Deadmans Lake
How Big Is Deadmans Lake?
Deadmans Lake covers 185.06 acres in Bennett County, South Dakota.
What Is the Largest Lake in Bennett County?
Little White River Pool Reservoir is the largest lake in Bennett County, at 569.08 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 154733207). Verified October 30, 2026.