Lakes / South Dakota / Marshall County / Redman Slough
Redman Slough, South Dakota
109.96 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - South Dakota
45.61 degrees N, 97.48 degrees W - Marshall 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 Redman Slough Stacks Up
- Larger than 46% of the 533 lakes counted in South Dakota.
- About 50 miles from Aberdeen, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Opitz Lake | Marshall | 1.3 mi | 1,664.01 acres |
| Parsons Pass | Marshall | 3.3 mi | 1,582.71 acres |
| Lost Lake | Marshall | 4.5 mi | 123.31 acres |
| Stink Lakes | Marshall | 4.8 mi | 411.68 acres |
| Horseshoe Lake | Marshall | 5.3 mi | 124.54 acres |
| Mallard Slough | Marshall | 5.5 mi | 194.47 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Redman Slough
How Big Is Redman Slough?
Redman Slough covers 109.96 acres in Marshall County, South Dakota.
What Is the Largest Lake in Marshall County?
Buffalo Lakes is the largest lake in Marshall County, at 1,986.48 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 145087897). Verified October 30, 2026.