Lake Country /  The Lakes  /  Oconomowoc

Oconomowoc Lake

One of Lake Country's most prestigious addresses: Oconomowoc Lake is private, established, and reached by the public only by way of the river.

818 ac
Surface acres
60 ft
Max depth
Drainage lake
Lake type
Source: WI DNR · WBIC 849600
Public boat access

The lake, mapped

The real Oconomowoc shoreline with every public boat launch - where you get on and off the water. Sourced from the Wisconsin DNR public boat-access data and local knowledge.

Real Oconomowoc shoreline with public boat launches - click a pin for details. Ramp
Boat launches & landings
Oconomowoc Lake Boat LaunchRampPublic landing
River access connecting to Oconomowoc Lake - not a lakeshore ramp.
Public DNR & municipal boat launches. Private residential launches are intentionally excluded.
Built from public DNR data

The Oconomowoc Water Record

Clarity, trophic state, and nutrients - pulled from Wisconsin DNR lake monitoring and refreshed each open-water monitoring season (roughly May-October; quiet over winter).

Lake health grade · derived from DNR trophic-state data
A-
Excellent & stable
5-yr avg TSI 39 · oligotrophic
BasinMain Lake
Water clarity (Secchi)
8 ft
Deep-hole reading · very clear
Jun 2026
Chlorophyll-a
4.48 µg/L
Low late-summer · clear-water range
Jun 2026
Phosphorus
11.8 µg/L
Oligotrophic-mesotrophic · low range
latest available · Jun 2026
BasinSmall Part of Lake
Water clarity (Secchi)
8 ft
NE bay (Hewitt Pt) · clear
Jun 2026
Chlorophyll-a
1.66 µg/L
Very low · clear-water range
Nov 2023
Phosphorus
31.9 µg/L
Shallower NE bay · higher-nutrient than the main lake
latest available · Aug 2023
Blue-green algae

Wisconsin doesn’t routinely monitor inland lakes for blue-green algae - the state tracks blooms by report, not on a schedule, so no lake carries an official season-by-season advisory record. See a bloom? Avoid contact until it clears and report it to the DNR →

Game fish · DNR-confirmed
WalleyeNorthern PikeLargemouth BassSmallmouth BassPanfish
Invasive species present
Eurasian Water-MilfoilZebra Mussel
Source: WI DNR SWIMS / Citizen Lake Monitoring Network, via the federal Water Quality Portal · refreshed through the DNR monitoring season (≈ May-Oct), not real-timeGet free water-quality alerts →
The character of the water

What it's actually like to own here

The nuance with the lake - what the bottom is like underfoot and how the weekend actually feels.

Bottom
Gravel
DNR: 80% gravel, 10% sand, 10% muck.
Weekend traffic
Low/Moderate
On-water activity on a typical summer weekend.
Community
Municipality
  • Village of Oconomowoc Lake
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