Lakes / South Dakota / Deuel County / Cottonwood Slough
Cottonwood Slough, Deuel County, South Dakota
52.39 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - South Dakota
44.64 degrees N, 96.51 degrees W - Deuel 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 Slough Stacks Up
- Larger than 17% of the 533 lakes counted in South Dakota.
- About 35 miles from Watertown, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Fish Lake | Deuel | 3.1 mi | 737.12 acres |
| South Slough | Deuel | 4.6 mi | 249.58 acres |
| Lake Cochrane | Deuel | 5.1 mi | 363 acres |
| Lake Oliver | Deuel | 5.9 mi | 150.73 acres |
| Culver Lake | Deuel | 5.9 mi | 76.3 acres |
| Oak Lake | Brookings | 8.5 mi | 400.8 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Cottonwood Slough
How Big Is Cottonwood Slough?
Cottonwood Slough covers 52.39 acres in Deuel County, South Dakota.
What Is the Largest Lake in Deuel County?
Lake Alice is the largest lake in Deuel County, at 1,058.09 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 122851383). Verified October 30, 2026.