Mercer Lake

Oneida County, Wisconsin

OverviewFacts & Figures

Physical Characteristics

Surface Area (Acres)255
Maximum Depth (ft)23
Mean Depth (ft)13
Shoreline (miles)
Bottom Composition55% sand, 10% gravel, 5% rock, 30% muck
Water Clarity — Secchi Depth (ft)
Trophic Status
Drainage BasinDRAINAGE
Lake Classlake
Public Access
Township
GPS Coordinates45.86860° N, 89.81140° W
WBIC (DNR ID)1538900

Fish Species

6 species documented

AbundantCommonPresentRare
SpeciesAbundanceLast Survey
MuskyCommon
WalleyeCommon
Largemouth BassPresent
Northern PikePresent
PanfishPresent
Smallmouth BassPresent

Boat Landings

No boat landing data available.

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
Chinese Mystery SnailConfirmed
Purple LoosestrifeConfirmed
Rusty CrayfishConfirmed

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

Mercer Lake — Facts & Figures | Stay Northern