Green Lake

Washington County, Wisconsin

OverviewFacts & Figures

Physical Characteristics

Surface Area (Acres)70
Maximum Depth (ft)37
Mean Depth (ft)17
Shoreline (miles)—
Bottom Composition65% sand, 10% gravel, 0% rock, 25% muck
Water Clarity — Secchi Depth (ft)—
Trophic Status—
Drainage BasinSEEPAGE
Lake Classlake
Public Access—
Township—
GPS Coordinates43.45980° N, 88.10120° W
WBIC (DNR ID)28100

Fish Species

4 species documented

AbundantCommonPresentRare
SpeciesAbundanceLast Survey
Largemouth BassCommon—
PanfishCommon—
Northern PikePresent—
WalleyePresent—

Boat Landings

1 landing

NameTypeRampTrailersFee♿
Green Lake AccessRAMP—1-5NoNo

Invasive Species

Invasive species have been documented in or near this lake. Please clean, drain, and dry all watercraft and equipment before leaving to prevent spread.

SpeciesStatusFirst Detected
Banded Mystery SnailConfirmed—
Curly-Leaf PondweedConfirmed—
Eurasian Water-MilfoilConfirmed—
Hybrid Eurasian / Northern Water-MilfoilConfirmed—
Ornamental water lilies (non-native Nymphaea sp.)Confirmed—
Starry StonewortConfirmed—

Data sourced from Wisconsin DNR lake surveys. Last scraped: 4/30/2026.