Where is Willow Lake?

Willow Lake is a lake in Oneida County, Wisconsin. Its water-quality measurements are published by Wisconsin DNR and shown on this page as reported.

How deep is Willow Lake?

Willow Lake has a maximum depth of 6 feet. The lake covers 410 acres.

Willow Lake

Oneida County, Wisconsin410 acresView map Directions

No nutrient or algae sampling on record from Wisconsin DNR for this lake.

Max depth

6 ft

Bathymetric survey

Area

410 acres

Surface area

Shoreline

3.9 mi

Measured length

Impaired · Mercury
6 ft max depth

See the measurements Directions Where to stay

Willow Lake in Oneida County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Maximum depth: 6 ft. Surface area: 410 acres.

Wisconsin DNR rates Panfish as abundant on Willow Lake. DNR survey details →

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Willow Lake is a 410-acre lake in Oneida County, Wisconsin with a maximum depth of 6 feet.

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

Swimming conditions

No reading

Not rated

Nutrient and algae readings are not a swimming clearance. Willow Lake is listed impaired under Clean Water Act §303(d) (IR 5) for mercury. Check local advisories before you swim.

Whether Willow Lake is safe to swim in today is a call for the Wisconsin Department of Natural Resources and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.

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Water quality measurements for Willow Lake

These are the measurements Wisconsin DNR publishes for Willow 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 Willow Lake

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

DNR fisheries survey

Wisconsin DNR rates Panfish as abundant on Willow Lake.

A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Willow Lake’s water-quality measurements separately. Catch rate is not a swim clearance and is not a weekly bite report.

WI DNR Lake Profile

Authoritative data from the Wisconsin DNR LakePages. 1 station on file (most recent sample 2019).

Fish Species (DNR-rated)

Panfish(Abundant)Northern Pike(Common)Musky(Present)Largemouth Bass(Present)Walleye(Present)

Contour map (PDF) →Full WI DNR LakePage →Water quality stations →

DNR Reports & Resources

Wisconsin DNR Fisheries scientists publish multi-year survey reports for Willow Lake covering fish populations, stocking, water quality, and management. 2 reports on file.

These links open on the official state DNR websites (Wisconsin DNR survey PDFs · Minnesota DNR LakeFinder).

2024
Willow Flowage fisheries survey, 2024
Fisheries Survey · WI DNR · 2024 (PDF)
2013
Comprehensive Fisheries Survey of Willow Lake, 2013
Comprehensive Survey · WI DNR · 2013 (PDF)

Lake Details

Max depth

6 ft

Surface area

410 acres

Shoreline

3.9 mi

Stays via Stay22

Stays near Willow Lake

Compare lakeside cabins, hotels, and vacation rentals near Willow Lake in Oneida County, Wisconsin — 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 Willow Lake

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Fishing Willow Lake

EPA Impairment Status

Willow Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).

Causes of impairment

Mercury

Designated uses not supporting: Fish consumption.

Source: EPA ATTAINS assessment unit WI10026528 · Official waterbody report

Nearby Lakes in Oneida County

Pier Lake1.7 miView →Lake Sixteen4.3 miView →Swamsauger Lake5.2 miView →Lost Lake6.5 miView →Willow Reservoir5 miView →Lake Marie6.5 miView →

Frequently asked questions about Willow Lake

Where is Willow Lake?: Willow Lake is a lake in Oneida County, Wisconsin. Its water-quality measurements are published by Wisconsin DNR and shown on this page as reported.
What is the water quality of Willow Lake?: Willow Lake in Oneida County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Maximum depth: 6 ft. Surface area: 410 acres.
Is Willow Lake safe to swim in?: Nutrient and algae readings are not a swimming clearance. Willow Lake is listed impaired under Clean Water Act §303(d) (IR 5) for mercury. Check local advisories before you swim.
How deep is Willow Lake?: Willow Lake has a maximum depth of 6 feet. The lake covers 410 acres.
What did the DNR fisheries survey find at Willow Lake?: Wisconsin DNR rates Panfish as abundant on Willow Lake. A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Willow Lake’s water-quality measurements separately. Catch rate is not a swim clearance and is not a weekly bite report.