WI · ranked by public data
8 St. Croix County lakes are at least 50 acres with a documented maximum depth, out of 37 documented lakes in the county. Updated July 2026.
St. Croix County, WI
40 ft maximum depth · 62 acres · No verified public access
St. Croix County, WI
36 ft maximum depth · 84 acres · 1 public landing
St. Croix County, WI
33 ft maximum depth · 370 acres · No verified public access
St. Croix County, WI
32 ft maximum depth · 110 acres · 1 public landing
St. Croix County, WI
21 ft maximum depth · 118 acres · 1 public landing · DNR impairment listed
St. Croix County, WI
20 ft maximum depth · 68 acres · 1 public landing
St. Croix County, WI
18 ft maximum depth · 170 acres · 1 public landing
St. Croix County, WI
17 ft maximum depth · 289 acres · No verified public access
Methodology
FAQ
Apple Falls Flowage — Apple Falls Flowage in St. Croix County is the deepest documented lake in St. Croix County, at 40 feet maximum depth.
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.