Lakes / South Dakota / Clark County / Swan Lake
Swan Lake, Clark County, South Dakota
936.31 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - South Dakota
45.13 degrees N, 97.55 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 Swan Lake Stacks Up
- Larger than 88% of the 533 lakes counted in South Dakota.
- About 27 miles from Watertown, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Heggs Lake | Clark | 1.8 mi | 392.43 acres |
| Long Lake | Day | 4.1 mi | 2,062.06 acres |
| Lake Todd | Clark | 5.6 mi | 203.13 acres |
| Carson Lake | Clark | 5.7 mi | 142.14 acres |
| Horseshoe Lake | Day | 5.9 mi | 607.13 acres |
| Pepper Slough | Clark | 6.2 mi | 111.44 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Swan Lake
How Big Is Swan Lake?
Swan Lake covers 936.31 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 145095315). Verified October 30, 2026.