Lakes / South Dakota / Lake County / Herman Slough
Herman Slough, South Dakota
26.93 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - South Dakota
43.99 degrees N, 97.16 degrees W - Lake 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 Herman Slough Stacks Up
- Larger than 1% of the 533 lakes counted in South Dakota.
- About 37 miles from Sioux Falls, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Lake Herman | Lake | 0.5 mi | 1,283.22 acres |
| Lake Madison | Lake | 7.4 mi | 2,763.52 acres |
| Crane Slough | Lake | 8.2 mi | 110.7 acres |
| Long Lake | Lake | 8.7 mi | 192 acres |
| Lake Henry | Lake | 9.1 mi | 517.47 acres |
| Lake George | Lake | 9.7 mi | 267.71 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Herman Slough
How Big Is Herman Slough?
Herman Slough covers 26.93 acres in Lake County, South Dakota.
What Is the Largest Lake in Lake County?
Lake Madison is the largest lake in Lake County, at 2,763.52 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 130994366). Verified October 30, 2026.