Lakes / South Dakota / Jerauld County / Grass Lake
Grass Lake, Jerauld County, South Dakota
64.74 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - South Dakota
43.95 degrees N, 98.33 degrees W - Jerauld 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 Grass Lake Stacks Up
- Larger than 24% of the 533 lakes counted in South Dakota.
- About 85 miles from Sioux Falls, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Twin Lakes | Sanborn | 0.7 mi | 139.86 acres |
| McCoy Lake | Sanborn | 5.7 mi | 61.28 acres |
| Long Lake | Sanborn | 7.6 mi | 224.7 acres |
| Letcher Lake | Sanborn | 10 mi | 27.18 acres |
| Wilmarth Lake | Aurora | 14 mi | 106.26 acres |
| Fish Lake | Aurora | 16 mi | 190.27 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Grass Lake
How Big Is Grass Lake?
Grass Lake covers 64.74 acres in Jerauld County, South Dakota.
What Is the Largest Lake in Jerauld County?
Long Lake is the largest lake in Jerauld County, at 298.26 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 125124685). Verified October 30, 2026.