WI · ranked by public data
6 Fond du Lac County lakes cover at least 50 acres, out of 33 documented lakes in the county. Updated July 2026.
Fond du Lac County, WI
423 acres · 47 ft max depth · 1 public landing
Fond du Lac County, WI
209 acres · 30 ft max depth · No verified public access
Fond du Lac County, WI
90 acres · 29 ft max depth · 1 public landing
Fond du Lac County, WI
75 acres · 47 ft max depth · 1 public landing
Fond du Lac County, WI
70 acres · 23 ft max depth · 1 public landing · DNR impairment listed
Fond du Lac County, WI
51 acres · 32 ft max depth · 1 public landing
Methodology
FAQ
Long Lake — Long Lake in Fond du Lac County is the biggest lake in Fond du Lac County, at 423 acres.
Source data: Wisconsin DNR lake and monitoring records as aggregated by LakeList. Figures reflect the most recent documented values, not new surveys — verify access and rules before you go. Lake outlines are shoreline shapes from LakeList and the USGS National Hydrography Dataset; they illustrate a lake's form and are not depth or navigation charts.