Crooked Lake
Oconto County, Wisconsin162 acresView mapDirections
Wisconsin DNR publishes the water-quality measurements for Crooked Lake. Here is what has been measured.
- Mesotrophic
- 3 aquatic invasives
- 37 ft max depth
- Public access
Crooked Lake in Oconto County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Water clarity: 11 ft visibility. Phosphorus: 11.8 µg/L. Maximum depth: 37 ft. Surface area: 162 acres.
Wisconsin DNR lists Largemouth Bass as common on Crooked Lake. DNR survey details →
Crooked Lake is a 162-acre mesotrophic lake in Oconto County, Wisconsin with a maximum depth of 37 feet. Water clarity is declining over recent sampling years. The lake supports 3 documented fish species including Panfish, Largemouth Bass, and Northern Pike. Public access is available. Compared to the 38 other monitored lakes in Oconto County, Crooked Lake ranks #9 for water quality.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2026-06-22. Methodology: how these readings are compared.
Crooked Lake covers about 160 acres in Oconto County. If you are planning to stay, you can search lake houses and cabins around Crooked Lake on Vrbo, or look for a hotel room near the lake on Booking.com or Expedia.
What Crooked Lake is good for
From access and monitoring records, not editorial picks.
- Clear water11 ft of visibility
- Fishing3 species recorded
- Deep water37 ft surveyed max depth
Swimming conditions
Readings onlyLow algae
Based on clarity and algae readings from past sampling — there is no live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Crooked 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.
Water quality measurements for Crooked Lake
These are the measurements Wisconsin DNR publishes for Crooked Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Good clarity, visible to about 11 ft. Phosphorus 11.8 µg/L. TSI 41.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 11ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 11.8µg/L | Good GoodFairPoor |
| Chlorophyll-a (algae) | No reading The green pigment in algae — a direct measure of how much algae is in the water. | |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 41 | Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Moderate nutrients, good water quality
Ask about Crooked Lake
Answers come straight from the public measurements and survey records on this page.
Wisconsin DNR lists Largemouth Bass as common on Crooked Lake.
A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Crooked Lake’s water-quality measurements separately, and the water-quality trend over 7 years of monitoring is stable. 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. Monitored by volunteers since 1993. 4 stations on file (most recent sample 2025).
Fish Species (DNR-rated)
Lake Details
Max depth
37 ft
Surface area
162 acres
Public access
Yes
Listed by Wisconsin DNR
Stays via Stay22
Stays near Crooked Lake
Compare lakeside cabins, hotels, and vacation rentals near Crooked Lake in Oconto 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 Crooked Lake
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Fish Species
Click a species to see every lake where it is documented.
Fishing Crooked Lake
Invasive & Introduced Species
Red chips are ecologically harmful invasive species. Gray chips are stocked or introduced fish that aren't a current ecological concern.
Water Quality Trend: Stable
Based on 7 years of monitoring (2020–2026).
Water clarity
Worsening6 years
Phosphorus
Improving-0.33 µg/L/yr7 years
Nearby Lakes in Oconto County
Frequently asked questions about Crooked Lake
Where is Crooked Lake?
- Crooked Lake is a lake in Oconto County, Wisconsin. Its water-quality measurements are published by Wisconsin DNR and shown on this page as reported.
What is the water quality of Crooked Lake?
- Crooked Lake in Oconto County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Water clarity: 11 ft visibility. Phosphorus: 11.8 µg/L. Maximum depth: 37 ft. Surface area: 162 acres.
Is Crooked Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Crooked Lake?
- Crooked Lake has a maximum depth of 37 feet. The lake covers 162 acres.
What fish are in Crooked Lake?
- Fish species found in Crooked Lake include Panfish, Largemouth Bass, Northern Pike. Crooked Lake is located in Oconto County, Wisconsin.
What did the DNR fisheries survey find at Crooked Lake?
- Wisconsin DNR lists Largemouth Bass as common on Crooked Lake. A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Crooked Lake’s water-quality measurements separately, and the water-quality trend over 7 years of monitoring is stable. Catch rate is not a swim clearance and is not a weekly bite report.
Can I fish at Crooked Lake?
- Public access to Crooked Lake is listed as yes on the lake record. Seasons, size and bag limits, and whether you need a license are set by Wisconsin's fish and wildlife agency, so check its current regulations before you go.
Explore Crooked Lake across LakeQuality
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Where this data comes from
24 measurements from 1 monitoring station, 2020–2026. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Wisconsin Department of Natural Resources
WIDNR_WQX24 samples · 2020–2026
Analytical methods
- Phosphorus by Colorimetry
Monitoring station identifiers (1)
EPA condition classes from the National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See where the data comes from and data sources.
Other records on this page
Fish and recreation data from Wisconsin DNR Lakes