Lakes / South Dakota / Hamlin County
Lakes in Hamlin County, South Dakota
9 lakes counted in Hamlin County - the largest is Lake Poinsett at 9,794.52 acres.
9
Lakes Counted
9,794.52 acres
Largest - Lake Poinsett
Hamlin County, highlighted, with its largest counted lakes dotted. Outlines from Census boundary data.
All Counted Lakes
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | Lake Poinsett | Hamlin | 9,794.52 acres | - |
| 2 | Lake Marsh | Hamlin | 3,025.76 acres | - |
| 3 | Lake Saint John | Hamlin | 1,271.11 acres | - |
| 4 | Lake Norden | Hamlin | 711.66 acres | - |
| 5 | Clear Lake | Hamlin | 705.73 acres | - |
| 6 | Baxter Slough | Hamlin | 637.45 acres | - |
| 7 | Lake Mary | Hamlin | 190.52 acres | - |
| 8 | Lake Florence | Hamlin | 112.43 acres | - |
| 9 | Gertson Slough | Hamlin | 91.92 acres | - |
Sources: USGS National Hydrography Dataset lake data; USGS. Verified October 30, 2026.