Lakes / Pennsylvania / Warren County
Lakes in Warren County, Pennsylvania
6 lakes counted in Warren County - the largest is Allegheny Reservoir at 12,081 acres.
6
Lakes Counted
12,081 acres
Largest - Allegheny Reservoir
128 ft
Deepest - Allegheny Reservoir
Warren County, highlighted, with its largest counted lakes dotted. Outlines from Census boundary data.
All Counted Lakes
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | Allegheny Reservoir | Warren | 12,081 acres | 128 ft |
| 2 | Tamarack Swamp | Warren | 615.5 acres | None |
| 3 | Benson Swamp | Warren | 163.8 acres | None |
| 4 | Seneca Pumped Storage Reservoir | Warren | 103.6 acres | None |
| 5 | Chapman Dam Reservoir | Warren | 68 acres | About 12 ft |
| 6 | Cranberry Swamp | Warren | 44.2 acres | None |
Sources: Pennsylvania Fish and Boat Commission lake data; USGS. Verified October 28, 2026.