Lakes / South Dakota / Pennington County
Lakes in Pennington County, South Dakota
5 lakes counted in Pennington County - the largest is Pactola Reservoir at 840.65 acres.
5
Lakes Counted
840.65 acres
Largest - Pactola Reservoir
Pennington County, highlighted, with its largest counted lakes dotted. Outlines from Census boundary data.
All Counted Lakes
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | Pactola Reservoir | Pennington | 840.65 acres | - |
| 2 | Sheridan Lake | Pennington | 382.77 acres | - |
| 3 | Deerfield Lake | Pennington | 327.91 acres | - |
| 4 | Shearer Lake | Pennington | 50.16 acres | - |
| 5 | Canyon Lake | Pennington | 38.45 acres | - |
Sources: USGS National Hydrography Dataset lake data; USGS. Verified October 30, 2026.