Lakes / South Dakota / Charles Mix County / Lake Platte
Lake Platte, South Dakota
117.87 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - South Dakota
43.39 degrees N, 98.89 degrees W - Charles Mix 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 Lake Platte Stacks Up
- Larger than 48% of the 533 lakes counted in South Dakota.
- About 99 miles from Pierre, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Joubert Lake | Douglas | 11 mi | 30.23 acres |
| Lake Francis Case | Charles Mix | 11 mi | 82,166.92 acres |
| Academy Lake | Charles Mix | 12 mi | 32.37 acres |
| Smith Lake | Brule | 13 mi | 70.92 acres |
| New Holland Lake | Douglas | 15 mi | 95.38 acres |
| Lake Geddes | Charles Mix | 16 mi | 79.07 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Lake Platte
How Big Is Lake Platte?
Lake Platte covers 117.87 acres in Charles Mix County, South Dakota.
What Is the Largest Lake in Charles Mix County?
Lake Francis Case is the largest lake in Charles Mix County, at 82,166.92 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 148209810). Verified October 30, 2026.