Lakes / South Dakota / Perkins County / Flat Creek Lake
Flat Creek Lake, South Dakota
161.36 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - South Dakota
45.78 degrees N, 102.18 degrees W - Perkins 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 Flat Creek Lake Stacks Up
- Larger than 57% of the 533 lakes counted in South Dakota.
- About 128 miles from Rapid City, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Shadehill Reservoir | Perkins | 5.0 mi | 3,801.22 acres |
| Lemmon Lake | Perkins | 7.7 mi | 166.8 acres |
| Morristown Lake | Corson | 22 mi | 108.48 acres |
| Owen Lake | Perkins | 24 mi | 136.4 acres |
| Morristown East Lake | Corson | 28 mi | 100.32 acres |
| Mallard Lake | Corson | 34 mi | 45.96 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Flat Creek Lake
How Big Is Flat Creek Lake?
Flat Creek Lake covers 161.36 acres in Perkins County, South Dakota.
What Is the Largest Lake in Perkins County?
Shadehill Reservoir is the largest lake in Perkins County, at 3,801.22 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 143227281). Verified October 30, 2026.