Lakes / New York / Seneca County
Lakes in Seneca County, New York
6 lakes counted in Seneca County - the largest is Seneca Lake at 43,343 acres.
6
Lakes Counted
43,343 acres
Largest - Seneca Lake
618 ft
Deepest - Seneca Lake
Seneca County, highlighted, with its largest counted lakes dotted. Outlines from Census boundary data.
All Counted Lakes
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | Seneca Lake | Ontario, Yates, Seneca, Schuyler | 43,343 acres | 618 ft |
| 2 | Montezuma Marsh | Seneca | 1,096 acres | - |
| 3 | Black Lake | Seneca | 793 acres | - |
| 4 | Montezuma Marsh | Seneca | 86 acres | - |
| 5 | Van Cleef Lake | Seneca | 44 acres | - |
| 6 | Gem Lake | Seneca | 38 acres | - |
Sources: New York State DEC lake data; USGS. Verified October 30, 2026.