Lakes / South Dakota / Day County / Buchner Slough
Buchner Slough, South Dakota
61.78 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - South Dakota
45.33 degrees N, 97.56 degrees W - Day 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 Buchner Slough Stacks Up
- Larger than 22% of the 533 lakes counted in South Dakota.
- About 37 miles from Watertown, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Holmquist Slough | Day | 4.3 mi | 105.02 acres |
| Antelope Lake | Day | 5.1 mi | 574.37 acres |
| South Waubay Lake | Day | 6.3 mi | 2,334.9 acres |
| Bitter Lake | Day | 6.9 mi | 85.5 acres |
| Mud Lake | Day | 7.2 mi | 62.76 acres |
| Solomon Slough | Day | 9.0 mi | 1,289.82 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Buchner Slough
How Big Is Buchner Slough?
Buchner Slough covers 61.78 acres in Day County, South Dakota.
What Is the Largest Lake in Day County?
Bitter Lake is the largest lake in Day County, at 7,865.28 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 145090525). Verified October 30, 2026.