Lakes / South Dakota / Dewey County / Little Moreau Lake
Little Moreau Lake, South Dakota
33.85 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - South Dakota
45.35 degrees N, 101.09 degrees W - Dewey 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 Little Moreau Lake Stacks Up
- Larger than 7% of the 533 lakes counted in South Dakota.
- About 77 miles from Pierre, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Horseshoe Lake | Dewey | 5.5 mi | 81.79 acres |
| Timber Lake | Dewey | 6.3 mi | 424.08 acres |
| Whitehorse Lake | Dewey | 6.5 mi | 87.23 acres |
| Livermant Lake | Dewey | 6.7 mi | 64.49 acres |
| Peach Lake | Dewey | 11 mi | 54.36 acres |
| Dogeagle Lake | Corson | 13 mi | 139.61 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Little Moreau Lake
How Big Is Little Moreau Lake?
Little Moreau Lake covers 33.85 acres in Dewey County, South Dakota.
What Is the Largest Lake in Dewey County?
Lake Oahe is the largest lake in Dewey County, at 309,912.57 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 151678817). Verified October 30, 2026.