Lakes / South Dakota / McCook County / Island Lake
Island Lake, McCook County, South Dakota
280.22 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - South Dakota
43.80 degrees N, 97.13 degrees W - McCook 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 Island Lake Stacks Up
- Larger than 72% of the 533 lakes counted in South Dakota.
- About 26 miles from Sioux Falls, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Diamond Lake | Minnehaha | 3.5 mi | 176.68 acres |
| Buffalo Lake | Minnehaha | 4.6 mi | 278.49 acres |
| Clear Lake | Minnehaha | 6.3 mi | 491.58 acres |
| Lost Lake | Minnehaha | 8.7 mi | 94.89 acres |
| Buffalo Slough | Lake | 11 mi | 246.86 acres |
| Long Lake | Lake | 11 mi | 192 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Island Lake
How Big Is Island Lake?
Island Lake covers 280.22 acres in McCook County, South Dakota.
What Is the Largest Lake in McCook County?
East Vermillion Lake is the largest lake in McCook County, at 569.27 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 130995883). Verified October 30, 2026.