Where is Lake Wilhelm?

Lake Wilhelm is a lake in Mercer County, Pennsylvania. Its water-quality measurements are published by PA DEP and shown on this page as reported.

How deep is Lake Wilhelm?

Lake Wilhelm has a maximum depth of 24 feet and an average depth of 1.7 feet. The lake covers 1567 acres.

Are there boat ramps on Lake Wilhelm?

Lake Wilhelm has 4 documented boat landings in the USGS National Boat Ramps inventory. Named access points include Lake Wilhelm #4, Lake Wilhelm #2, Lake Wilhelm Marina, Lake Wilhelm #3. Public access is listed as yes.

Can I fish at Lake Wilhelm?

Lake Wilhelm has 4 documented boat landings in the USGS National Boat Ramps inventory. Seasons, size and bag limits, and whether you need a license are set by Pennsylvania's fish and wildlife agency, so check its current regulations before you go.

Lake Wilhelm

Mercer County, Pennsylvania1,567 acresView map Directions

No nutrient or algae sampling on record from PA DEP for this lake.

Max depth

24 ft

Bathymetric survey

Area

1,567 acres

Surface area

Shoreline

27.1 mi

Measured length

24 ft max depth
Public access
Limited data

See the measurements Directions Where to stay

Lake Wilhelm in Mercer County, Pennsylvania has water-quality measurements published by PA DEP, shown here as reported. Maximum depth: 24 ft. Surface area: 1567 acres.

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Lake Wilhelm is a 1,567-acre lake in Mercer County, Pennsylvania with a maximum depth of 24 feet (2-foot average). Limited fish-species data available. Public access is available with 4 public boat landings.

Source: EPA Water Quality Portal sampling records, PA DEP. Methodology: how these readings are compared.

What Lake Wilhelm is good for

From access and monitoring records, not editorial picks.

Boat launch4 documented ramps
Big water1,567 acres

Swimming conditions

No reading

Limited data

Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.

Whether Lake Wilhelm is safe to swim in today is a call for the Pennsylvania Department of Environmental Protection and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.

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Water quality measurements for Lake Wilhelm

These are the measurements PA DEP publishes for Lake Wilhelm, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.

No clarity data.

Ask about Lake Wilhelm

Answers come straight from the public measurements and survey records on this page.

Lake Details

Max depth

24 ft

Average depth

1.7 ft

Surface area

1,567 acres

Shoreline

27.1 mi

Public access

Yes

Listed by PA DEP

Recreation & Access

Boat Landings

Yes

Public Access

Lake Wilhelm #4Public
Lake Wilhelm #2Public
Lake Wilhelm MarinaPublic
Lake Wilhelm #3Public

Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps

Stays via Stay22

Stays near Lake Wilhelm

Compare lakeside cabins, hotels, and vacation rentals near Lake Wilhelm in Mercer County, Pennsylvania — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water.

Top-rated places to stay near Lake Wilhelm

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Fishing Lake Wilhelm

→ Lake Wilhelm fishing regulations (limits, seasons, special rules)

Nearby Lakes in Mercer County

Sandy Lake5.2 miView →Lake Latonka9.6 miView →Shenango River LakeEutrophic18.3 miView →Sugar Lake14.4 miView →Conneaut Lake16.6 miView →Woodcock Creek Lake19.4 miView →

Frequently asked questions about Lake Wilhelm

Where is Lake Wilhelm?: Lake Wilhelm is a lake in Mercer County, Pennsylvania. Its water-quality measurements are published by PA DEP and shown on this page as reported.
What is the water quality of Lake Wilhelm?: Lake Wilhelm in Mercer County, Pennsylvania has water-quality measurements published by PA DEP, shown here as reported. Maximum depth: 24 ft. Surface area: 1567 acres.
Is Lake Wilhelm safe to swim in?: Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Lake Wilhelm?: Lake Wilhelm has a maximum depth of 24 feet and an average depth of 1.7 feet. The lake covers 1567 acres.
Are there boat ramps on Lake Wilhelm?: Lake Wilhelm has 4 documented boat landings in the USGS National Boat Ramps inventory. Named access points include Lake Wilhelm #4, Lake Wilhelm #2, Lake Wilhelm Marina, Lake Wilhelm #3. Public access is listed as yes.
Can I fish at Lake Wilhelm?: Lake Wilhelm has 4 documented boat landings in the USGS National Boat Ramps inventory. Seasons, size and bag limits, and whether you need a license are set by Pennsylvania's fish and wildlife agency, so check its current regulations before you go.