Lakes / South Dakota / Sanborn County / Long Lake
Long Lake, Sanborn County, South Dakota
224.7 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - South Dakota
44.00 degrees N, 98.19 degrees W - Sanborn 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 Long Lake Stacks Up
- Larger than 68% of the 533 lakes counted in South Dakota.
- The largest lake in Sanborn County among those counted.
- About 79 miles from Sioux Falls, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| McCoy Lake | Sanborn | 6.1 mi | 61.28 acres |
| Twin Lakes | Sanborn | 7.2 mi | 139.86 acres |
| Letcher Lake | Sanborn | 7.2 mi | 27.18 acres |
| Grass Lake | Jerauld | 7.6 mi | 64.74 acres |
| Lake Mitchell | Davison | 18 mi | 669.16 acres |
| O'Neal Lake | Miner | 19 mi | 30.64 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Long Lake
How Big Is Long Lake?
Long Lake covers 224.7 acres in Sanborn County, South Dakota.
What Is the Largest Lake in Sanborn County?
Long Lake is the largest lake in Sanborn County, at 224.7 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 125127638). Verified October 30, 2026.