Lakes / South Dakota / Clark County / Mankey Slough
Mankey Slough, South Dakota
119.35 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - South Dakota
44.93 degrees N, 97.53 degrees W - Clark 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 Mankey Slough Stacks Up
- Larger than 48% of the 533 lakes counted in South Dakota.
- About 20 miles from Watertown, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Blythe Slough | Codington | 5.1 mi | 195.21 acres |
| Warner Lake | Codington | 5.7 mi | 149.75 acres |
| Lake Henry | Codington | 5.9 mi | 203.86 acres |
| Long Lake | Codington | 6.3 mi | 2,488.72 acres |
| Stink Lake | Codington | 6.6 mi | 337.19 acres |
| Dry Lake Number One | Clark | 8.2 mi | 2,460.51 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Mankey Slough
How Big Is Mankey Slough?
Mankey Slough covers 119.35 acres in Clark County, South Dakota.
What Is the Largest Lake in Clark County?
Dry Lake Number Two is the largest lake in Clark County, at 6,441.66 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 147526040). Verified October 30, 2026.