Cowan Lake is a lake in Clinton County, Ohio. Its water-quality measurements are published by Ohio EPA and shown on this page as reported.

How deep is Cowan Lake?

Cowan Lake has a maximum depth of 35.9 feet. The lake covers 696 acres.

Are there boat ramps on Cowan Lake?

Cowan Lake has 2 documented boat landings in the USGS National Boat Ramps inventory. Named access points include Cowan Lake State Park - West End Ramp, Cowan Lake State Park. Public access is listed as yes.

Can I fish at Cowan Lake?

Cowan Lake has 2 documented boat landings in the USGS National Boat Ramps inventory. Seasons, size and bag limits, and whether you need a license are set by Ohio's fish and wildlife agency, so check its current regulations before you go.

Are there campgrounds on Cowan Lake?

Cowan Lake has 1 public campground from USGS The National Map within 5 km, including Cowan Lake State Park Campground. This is a location join, not a booking. Cabins and hotels are listed separately; campsite reservations use the official link when the source provides one.

Cowan Lake

Clinton County, Ohio696 acresView map Directions

No nutrient or algae sampling on record from Ohio EPA for this lake.

Max depth

35.9 ft

Bathymetric survey

Area

696 acres

Surface area

Shoreline

16.9 mi

Measured length

36 ft max depth
Public access

See the measurements Directions Where to stay

Cowan Lake in Clinton County, Ohio has water-quality measurements published by Ohio EPA, shown here as reported. Maximum depth: 35.9 ft. Surface area: 696 acres.

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Cowan Lake is a 696-acre lake in Clinton County, Ohio with a maximum depth of 36 feet. Limited fish-species data available. Public access is available with 2 public boat landings.

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

What Cowan Lake is good for

From access and monitoring records, not editorial picks.

Boat launch2 documented ramps
Camping1 public campground nearby
Deep water35.9 ft surveyed max depth

Swimming conditions

No reading

Not rated

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

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

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Water quality measurements for Cowan Lake

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

No clarity data. TSI undefined.

Ask about Cowan Lake

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

Lake Details

Max depth

35.9 ft

Surface area

696 acres

Shoreline

16.9 mi

Public access

Yes

Listed by Ohio EPA

Recreation & Access

Boat Landings

Yes

Public Access

Campgrounds

Cowan Lake State Park - West End RampPublic
Cowan Lake State ParkPublic

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

Public campgrounds near Cowan Lake

Cowan Lake State Park Campground0.8 km

Nearest public campgrounds in the USGS National Map inventory, within about 3 miles. An empty list means USGS records no campground that close, which is not the same as camping being unavailable. Where the source gives an official reservation link, it is used; the cabin and hotel search does not cover campsites. More camping lakes

Stays via Stay22

Stays near Cowan Lake

Compare lakeside cabins, hotels, and vacation rentals near Cowan Lake in Clinton County, Ohio — 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 Cowan Lake

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Fishing Cowan Lake

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

Nearby Lakes in Clinton County

Wilmington Reservoir Number Two5.2 miView →Caesar Creek Lake3.2 ft clear · Eutrophic10.9 miView →Lake Lorelei14.3 miView →Spring Valley Lake13.9 miView →Stonelick Lake14.8 miView →Shawnee Lake19.3 miView →

Frequently asked questions about Cowan Lake

Where is Cowan Lake?: Cowan Lake is a lake in Clinton County, Ohio. Its water-quality measurements are published by Ohio EPA and shown on this page as reported.
What is the water quality of Cowan Lake?: Cowan Lake in Clinton County, Ohio has water-quality measurements published by Ohio EPA, shown here as reported. Maximum depth: 35.9 ft. Surface area: 696 acres.
Is Cowan Lake safe to swim in?: Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Cowan Lake?: Cowan Lake has a maximum depth of 35.9 feet. The lake covers 696 acres.
Are there boat ramps on Cowan Lake?: Cowan Lake has 2 documented boat landings in the USGS National Boat Ramps inventory. Named access points include Cowan Lake State Park - West End Ramp, Cowan Lake State Park. Public access is listed as yes.
Can I fish at Cowan Lake?: Cowan Lake has 2 documented boat landings in the USGS National Boat Ramps inventory. Seasons, size and bag limits, and whether you need a license are set by Ohio's fish and wildlife agency, so check its current regulations before you go.
Are there campgrounds on Cowan Lake?: Cowan Lake has 1 public campground from USGS The National Map within 5 km, including Cowan Lake State Park Campground. This is a location join, not a booking. Cabins and hotels are listed separately; campsite reservations use the official link when the source provides one.