Lakes / South Dakota / Marshall County / Clear Lake
Clear Lake, Marshall County, South Dakota
1,198.96 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - South Dakota
45.69 degrees N, 97.36 degrees W - Marshall 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 Clear Lake Stacks Up
- Larger than 90% of the 533 lakes counted in South Dakota.
- About 56 miles from Watertown, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| North Red Iron Lake | Marshall | 1.8 mi | 175.2 acres |
| Simmon Lake | Marshall | 2.0 mi | 67.21 acres |
| South Red Iron Lake | Marshall | 2.5 mi | 623.94 acres |
| Long Lake | Marshall | 2.6 mi | 289.85 acres |
| Pete W Slough | Marshall | 3.1 mi | 32.37 acres |
| Goodbird Lake | Marshall | 3.3 mi | 66.47 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Clear Lake
How Big Is Clear Lake?
Clear Lake covers 1,198.96 acres in Marshall County, South Dakota.
What Is the Largest Lake in Marshall County?
Buffalo Lakes is the largest lake in Marshall County, at 1,986.48 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 145087247). Verified October 30, 2026.