Wilson Lake
Wilson Lake in Waushara County, Wisconsin has a water quality grade of B (Good). Water clarity: 6.2 ft visibility. Phosphorus: 19.1 µg/L. Maximum depth: 12 ft. Surface area: 75 acres.
Wisconsin DNR lists Largemouth Bass as common on Wilson Lake. DNR survey details →
- Clarity
- 6.2 ft
- Max depth
- 12 ft
- Area
- 75 acres
- Type
- Mesotrophic
- Trend
- ↓ Declining
- Public access
- Yes
Next lake in Waushara County
Swipe left or right on this bar to open the next or previous lake.
Wilson Lake is a 75-acre mesotrophic lake in Waushara County, Wisconsin with a maximum depth of 12 feet. Water quality is graded B based on 1 sampling years through 2026. Overall water quality is declining over recent sampling years. The lake supports 4 documented fish species including Panfish, Largemouth Bass, and Smallmouth Bass. Public access is available with 1 public boat landing. Compared to the 15 other monitored lakes in Waushara County, Wilson Lake ranks #12 for water quality.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2026-06-20. Grade methodology: LakeQuality methodology.
Watch Wilson Lake water quality
Subscribe for LakeQuality updates by email. No spam, unsubscribe anytime.
Swimming Safety
Grade onlyLow algae
Based on clarity and algae grades from past sampling — we do not hold live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Good for swimming, clear water with low algae levels
Water Quality Grade: B (Good)
Murky, only visible to about 6.2 ft. Phosphorus level: 19.1 µg/L. Trophic State Index: 49.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 6.2 ft | Not graded |
| Phosphorus | 19.1 µg/L | Good |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 49 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Wilson Lake
Compare lakeside cabins, hotels, and vacation rentals near Wilson Lake in Waushara 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 Wilson Lake
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Planning a whole trip? See where to stay at Wisconsin’s top lakes →
Wisconsin DNR lists Largemouth Bass as common on Wilson Lake.
A DNR fisheries survey reports fish abundance and catch rates, not a water-quality grade. LakeQuality grades Wilson Lake B from EPA Water Quality Portal chemistry, and the water-quality trend over 7 years of monitoring is declining. 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 2007. 2 stations on file (most recent sample 2025).
Fish Species (DNR-rated)
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 12 ft |
| Surface Area | 75 acres |
| Public Access | Yes |
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS).
Recreation & Access
- North Wilson Lake RoadPublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fish Species
Click a species to see every graded lake where it is documented.
Fishing Wilson 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: ↓ Declining
Based on 7 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -0.296 m/yr | 6 |
| Phosphorus | → Stable | +0.26 µg/L/yr | 7 |
County Ranking
Ranked #12 of 16 lakes in Waushara County
Nearby Lakes in Waushara County
Frequently asked questions about Wilson Lake
Where is Wilson Lake?
- Wilson Lake is a lake in Waushara County, Wisconsin. LakeQuality grades it B for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Wilson Lake?
- Wilson Lake in Waushara County, Wisconsin has a water quality grade of B (Good). Water clarity: 6.2 ft visibility. Phosphorus: 19.1 µg/L. Maximum depth: 12 ft. Surface area: 75 acres.
Is Wilson Lake safe to swim in?
- Good for swimming, clear water with low algae levels. Wilson Lake has a water quality grade of B (Good). Always check local health department advisories before swimming.
How deep is Wilson Lake?
- Wilson Lake has a maximum depth of 12 feet. The lake covers 75 acres.
What fish are in Wilson Lake?
- Fish species found in Wilson Lake include Panfish, Largemouth Bass, Smallmouth Bass, Northern Pike. Wilson Lake is located in Waushara County, Wisconsin.
What did the DNR fisheries survey find at Wilson Lake?
- Wisconsin DNR lists Largemouth Bass as common on Wilson Lake. A DNR fisheries survey reports fish abundance and catch rates, not a water-quality grade. LakeQuality grades Wilson Lake B from EPA Water Quality Portal chemistry, and the water-quality trend over 7 years of monitoring is declining. Catch rate is not a swim clearance and is not a weekly bite report.
Are there boat ramps on Wilson Lake?
- Wilson Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include North Wilson Lake Road. Public access is listed as yes.
Explore Wilson Lake across LakeQuality
Fish species and top-graded lakes across Wisconsin
Fish species and best lakes in Waushara County
Species activity outlook by water temperature and season
Where to stay at Wisconsin's top lakes, each with its grade
Moderate nutrients, good water quality
Wisconsin's cleanest and most-polluted lakes, ranked
More Wisconsin Lake Rankings
State Parks Near Wilson Lake
Other Grade B Lakes in Wisconsin
Mesotrophic Lakes in Wisconsin
Where this data comes from
33 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_WQX33 samples · 2020–2026
Analytical methods
- Phosphorus by Colorimetry
Monitoring station identifiers (1)
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See how grades are calculated and data sources.
Other records on this page
Lake size & watershed from HydroLAKES (HydroSHEDS)
Fish and recreation data from Wisconsin DNR Lakes
Named boat-access points from the USGS National Boat Ramps inventory