Lakes / South Dakota / Brookings County / Lake Tetonkaha
Lake Tetonkaha, South Dakota
1,126.56 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - South Dakota
44.44 degrees N, 97.00 degrees W - Brookings 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 Tetonkaha Stacks Up
- Larger than 90% of the 533 lakes counted in South Dakota.
- About 32 miles from Watertown, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Mortimer Slough | Brookings | 1.0 mi | 138.63 acres |
| Lake Oakwood | Brookings | 1.7 mi | 866.35 acres |
| Moe Slough | Brookings | 2.4 mi | 104.03 acres |
| Lake Mitchell | Brookings | 4.6 mi | 199.41 acres |
| Lake Goldsmith | Brookings | 7.2 mi | 289.85 acres |
| Lake Thisted | Kingsbury | 7.8 mi | 272.8 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Lake Tetonkaha
How Big Is Lake Tetonkaha?
Lake Tetonkaha covers 1,126.56 acres in Brookings County, South Dakota.
What Is the Largest Lake in Brookings County?
Lake Sinai is the largest lake in Brookings County, at 1,789.59 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 126759120). Verified October 30, 2026.