Lakes / New York / Rockland County
Lakes in Rockland County, New York
17 lakes counted in Rockland County - the largest is Lake Tappan at 920 acres.
17
Lakes Counted
920 acres
Largest - Lake Tappan
40 ft
Deepest - Hessian Lake
Rockland County, highlighted, with its largest counted lakes dotted. Outlines from Census boundary data.
All Counted Lakes
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | Lake Tappan | Rockland | 920 acres | - |
| 2 | DeForest Lake | Rockland | 745 acres | - |
| 3 | Lake Sebago | Rockland | 297 acres | 37 ft |
| 4 | Rockland Lake | Rockland | 279 acres | 37 ft |
| 5 | DeForest Lake | Rockland | 237 acres | - |
| 6 | Lake Welch | Rockland | 182 acres | 33 ft |
| 7 | Congers Lake | Rockland | 116 acres | - |
| 8 | Cranberry Pond | Rockland | 101 acres | - |
| 9 | Potake Pond | Rockland | 93 acres | - |
| 10 | Sheppard Pond | Rockland | 74 acres | - |
| 11 | Pine Meadow Lake | Rockland | 72 acres | - |
| 12 | Breakneck Pond | Rockland | 63 acres | - |
| 13 | Hessian Lake | Rockland | 44 acres | 40 ft |
| 14 | Swartwont Lake | Rockland | 40 acres | - |
| 15 | Lake Wanoksink | Rockland | 39 acres | - |
| 16 | Tappan Lake | Rockland | 34 acres | - |
| 17 | Third Reservoir | Rockland | 26 acres | - |
Sources: New York State DEC lake data; USGS. Verified October 30, 2026.