Lakes / South Dakota / Sully County / Cottonwood Lake
Cottonwood Lake, Sully County, South Dakota
461.59 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - South Dakota
44.84 degrees N, 99.91 degrees W - Sully 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 Cottonwood Lake Stacks Up
- Larger than 80% of the 533 lakes counted in South Dakota.
- About 39 miles from Pierre, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Stone Lake | Sully | 8.4 mi | 1,023.51 acres |
| Durrstein Lake | Sully | 11 mi | 83.68 acres |
| Post Lake | Sully | 15 mi | 35.35 acres |
| Spring Lake | Hyde | 15 mi | 248.66 acres |
| Sully Lake | Sully | 16 mi | 212.26 acres |
| Thomas Lake | Hyde | 19 mi | 157.46 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Cottonwood Lake
How Big Is Cottonwood Lake?
Cottonwood Lake covers 461.59 acres in Sully County, South Dakota.
What Is the Largest Lake in Sully County?
Stone Lake is the largest lake in Sully County, at 1,023.51 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 139476488). Verified October 30, 2026.