Lakes / Pennsylvania / Mercer County
Lakes in Mercer County, Pennsylvania
4 lakes counted in Mercer County - the largest is Shenango River Lake at 3,559 acres.
4
Lakes Counted
3,559 acres
Largest - Shenango River Lake
30 ft
Deepest - Shenango River Lake
Mercer County, highlighted, with its largest counted lakes dotted. Outlines from Census boundary data.
All Counted Lakes
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | Shenango River Lake | Mercer | 3,559 acres | 30 ft |
| 2 | Lake Wilhelm | Mercer | 1,739 acres | About 22 ft |
| 3 | Lake Latonka | Mercer | 260 acres | None |
| 4 | Cranberry Swamp | Mercer | 198.7 acres | None |
Sources: Pennsylvania Fish and Boat Commission lake data; USGS. Verified October 28, 2026.