WI · ranked by public data
2 La Crosse County lakes cover at least 50 acres, out of 8 documented lakes in the county. Updated July 2026.
La Crosse County, WI
8,391 acres · 40 ft max depth · 7 public landings
La Crosse County, WI
606 acres · 11 ft max depth · 2 public landings · DNR impairment listed
Methodology
FAQ
Lake Onalaska — Lake Onalaska in La Crosse County is the biggest lake in La Crosse County, at 8,391 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.