Lakes / South Dakota / Day County / Phragmites Pond
Phragmites Pond, South Dakota
26.69 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - South Dakota
45.42 degrees N, 97.35 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 Phragmites Pond Stacks Up
- Larger than 1% of the 533 lakes counted in South Dakota.
- About 38 miles from Watertown, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Swan Pond | Day | 0.5 mi | 98.84 acres |
| Hillebrands Lake | Day | 0.8 mi | 461.59 acres |
| Spring Lake | Day | 1.1 mi | 984.22 acres |
| Dahling Slough | Day | 1.3 mi | 94.15 acres |
| Minnewasta Lake | Day | 2.3 mi | 609.61 acres |
| Waubay Lake | Day | 2.6 mi | 5,577.3 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Phragmites Pond
How Big Is Phragmites Pond?
Phragmites Pond covers 26.69 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 145089631). Verified October 30, 2026.