Lakes / South Dakota / Lake County / Gilman Lake
Gilman Lake, South Dakota
129.24 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - South Dakota
44.10 degrees N, 97.35 degrees W - Lake 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 Gilman Lake Stacks Up
- Larger than 51% of the 533 lakes counted in South Dakota.
- About 49 miles from Sioux Falls, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Hageman Slough | Miner | 2.3 mi | 61.04 acres |
| McCart Slough | Miner | 3.5 mi | 74.87 acres |
| Crane Slough | Lake | 3.9 mi | 110.7 acres |
| Otter Lake | Miner | 4.2 mi | 79.82 acres |
| Silver Lake | Miner | 5.2 mi | 87.23 acres |
| The Horseshoe | Miner | 5.2 mi | 43.85 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Gilman Lake
How Big Is Gilman Lake?
Gilman Lake covers 129.24 acres in Lake County, South Dakota.
What Is the Largest Lake in Lake County?
Lake Madison is the largest lake in Lake County, at 2,763.52 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 123213436). Verified October 30, 2026.