Lakes / South Dakota / Clark County / Logan Dam
Logan Dam, South Dakota
38.8 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - South Dakota
44.84 degrees N, 97.95 degrees W - Clark 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 Logan Dam Stacks Up
- Larger than 11% of the 533 lakes counted in South Dakota.
- About 41 miles from Watertown, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Fordham Dam | Clark | 5.0 mi | 82.78 acres |
| Mud Lake | Clark | 10 mi | 77.34 acres |
| Antelope Lake | Clark | 11 mi | 270.83 acres |
| Dry Lake Number One | Clark | 14 mi | 2,460.51 acres |
| Baileys Lake | Clark | 14 mi | 161.85 acres |
| Round Lake | Clark | 16 mi | 97.85 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Logan Dam
How Big Is Logan Dam?
Logan Dam covers 38.8 acres in Clark County, South Dakota.
What Is the Largest Lake in Clark County?
Dry Lake Number Two is the largest lake in Clark County, at 6,441.66 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 145669243). Verified October 30, 2026.