Lakes / South Dakota / Clark County / Round Lake
Round Lake, Clark County, South Dakota
97.85 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - South Dakota
45.04 degrees N, 97.77 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 Round Lake Stacks Up
- Larger than 40% of the 533 lakes counted in South Dakota.
- About 34 miles from Watertown, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Reid Lake | Clark | 1.8 mi | 1,045.61 acres |
| Baileys Lake | Clark | 3.0 mi | 161.85 acres |
| Madian Lake | Clark | 4.9 mi | 62.27 acres |
| Twin Sloughs | Clark | 6.0 mi | 57.08 acres |
| Cottonwood Lake | Clark | 7.3 mi | 462.39 acres |
| Dry Lake Number One | Clark | 8.0 mi | 2,460.51 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Round Lake
How Big Is Round Lake?
Round Lake covers 97.85 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 145096742). Verified October 30, 2026.