Delavan Lake

Walworth County, Wisconsin

OverviewFacts & Figures

Physical Characteristics

Surface Area (Acres)1,906
Maximum Depth (ft)52
Mean Depth (ft)21
Shoreline (miles)
Bottom Composition30% sand, 30% gravel, 0% rock, 40% muck
Water Clarity — Secchi Depth (ft)
Trophic Status
Drainage BasinDRAINAGE
Lake Classlake
Public Access
Township
GPS Coordinates42.60450° N, 88.61080° W
WBIC (DNR ID)793600

Fish Species

6 species documented

AbundantCommonPresentRare
SpeciesAbundanceLast Survey
PanfishAbundant
Largemouth BassPresent
MuskyPresent
Northern PikePresent
Smallmouth BassPresent
WalleyePresent

Boat Landings

4 landings

NameTypeRampTrailersFee
Boat Landing 1Public
Boat Landing 2Public
Boat Landing 3Public
Boat Landing 4Public

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
PennywortConfirmed
Phragmites (non-native)Confirmed
Purple LoosestrifeConfirmed
Zebra MusselConfirmed

Data sourced from Wisconsin DNR lake surveys. Last scraped: 3/24/2026.