Lakes / South Dakota / Yankton County / Lake Yankton
Lake Yankton, South Dakota
322.23 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - South Dakota
42.86 degrees N, 97.48 degrees W - Yankton 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 Yankton Stacks Up
- Larger than 75% of the 533 lakes counted in South Dakota.
- The largest lake in Yankton County among those counted.
- About 60 miles from Sioux Falls, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Lewis and Clark Lake | Bon Homme | 10 mi | 25,141.99 acres |
| Beaver Lake | Yankton | 11 mi | 125.78 acres |
| Hruska Lake | Bon Homme | 12 mi | 26.46 acres |
| Kubal Lake | Bon Homme | 15 mi | 26.55 acres |
| Pechous Lake | Bon Homme | 15 mi | 64.38 acres |
| Kloucek Lake | Bon Homme | 16 mi | 64.99 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Lake Yankton
How Big Is Lake Yankton?
Lake Yankton covers 322.23 acres in Yankton County, South Dakota.
What Is the Largest Lake in Yankton County?
Lake Yankton is the largest lake in Yankton County, at 322.23 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 128450549). Verified October 30, 2026.