Lakes / South Dakota / Corson County / Mallard Lake
Mallard Lake, South Dakota
45.96 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - South Dakota
45.89 degrees N, 101.49 degrees W - Corson 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 Mallard Lake Stacks Up
- Larger than 15% of the 533 lakes counted in South Dakota.
- About 119 miles from Pierre, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Morristown East Lake | Corson | 7.6 mi | 100.32 acres |
| McIntosh Lake | Corson | 7.6 mi | 44.73 acres |
| Morristown Lake | Corson | 13 mi | 108.48 acres |
| Tatanka Lake | Corson | 14 mi | 34.59 acres |
| Lemmon Lake | Perkins | 26 mi | 166.8 acres |
| Isabel Lake | Dewey | 32 mi | 107.99 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Mallard Lake
How Big Is Mallard Lake?
Mallard Lake covers 45.96 acres in Corson County, South Dakota.
What Is the Largest Lake in Corson County?
Spring Lake is the largest lake in Corson County, at 435.65 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 143226595). Verified October 30, 2026.