Lakes / Pennsylvania / Lake Wilhelm
Lake Wilhelm, Pennsylvania
1,739 acres
Surface Area
About 22 ft
Max Depth (Approximate)
1,192 ft
Surface Elevation
Where It Sits, and How Deep It Goes
Locator - Pennsylvania
41.41 degrees N, 80.13 degrees W - Mercer County. State and county outlines drawn from Census boundary data; the lake marker is placed by its Pennsylvania Fish and Boat Commission coordinates, not by eye. Schematic - not a survey map.
Depth Profile - Lake Wilhelm
Schematic cross-section drawn to one shared depth scale - not a survey or bathymetric map. Max depth is approximate, from Pennsylvania DCNR state park bathymetry.
How Lake Wilhelm Stacks Up
- Ranks #9 for surface area among the Pennsylvania lakes counted so far - 1,739 acres.
- About 50 miles from Erie, as the crow flies.
- 17 fish species on the Fish and Boat Commission list for this lake.
Fish Species
WalleyeMuskellungeLargemouth BassChannel CatfishBlack CrappieWhite CrappieYellow PerchBluegillPumpkinseedBowfinBrown BullheadCommon CarpGizzard ShadGolden ShinerGreen SunfishWhite SuckerYellow Bullhead
Species recorded for this lake. Presence only - no abundance ratings.
Facts and Figures
Waterbody ID412212800512
CountyMercer
Fishing IncludesWalleye, Muskellunge, Northern Pike, Largemouth Bass, Black Crappie, White Crappie, Yellow Perch, Bluegill, Pumpkinseed, Bullheads, Common Carp
Coordinates41.4121, -80.1298
Deepest Natural Lakes in Pennsylvania
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | Struble Lake | Chester | 146 acres | 19 ft |
Largest Lakes in Pennsylvania
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | Pymatuning Reservoir | Crawford | 13,920 acres | About 25 ft |
| 2 | Allegheny Reservoir | Warren | 12,081 acres | 128 ft |
| 3 | Raystown Lake | Huntingdon | 8,297 acres | None |
| 4 | Lake Wallenpaupack | Pike, Wayne | 5,698 acres | 60 ft |
| 5 | Shenango River Lake | Mercer | 3,559 acres | 30 ft |
Sources: Pennsylvania Fish and Boat Commission lake data (ID 412212800512); USGS; Pennsylvania Department of Conservation and Natural Resources, State Park Lakes Bathymetry; Pennsylvania Fish and Boat Commission, WWCW Fisheries Lakes (PASDA PAFishBoat layer 27). Verified October 28, 2026.