Lakes / Wisconsin / Lake Winnebago
Lake Winnebago, Wisconsin
131,939 acres
Surface Area
21 ft
Max Depth
15.5 ft
Average Depth
746 ft
Surface Elevation
Where It Sits, and How Deep It Goes
Locator - Wisconsin
44.02 degrees N, 88.41 degrees W - Winnebago, Fond du Lac, Calumet County. State and county outlines drawn from Census boundary data; the lake marker is placed by its DNR coordinates, not by eye. Schematic - not a survey map.
Depth Profile - Lake Winnebago
Schematic cross-section drawn to one shared depth scale - not a survey or bathymetric map. The benchmark is the state itself: Wisconsin Lakes defines a shallow lake as under 20 ft at its deepest, with an average depth under 10 ft.
How Lake Winnebago Stacks Up
- Ranks #10 for depth among the 13 natural lakes counted in Wisconsin so far.
- The largest lake counted in Wisconsin by surface area - 131,939 acres.
- About 72 miles from Milwaukee, as the crow flies.
- 8 fish species on the DNR list for this lake.
Fish Species
MuskyPanfishLargemouth BassSmallmouth BassNorthern PikeWalleyeSturgeonCatfish
Species recorded for this lake. Presence only - no abundance ratings.
Facts and Figures
Waterbody ID (WBIC)131100
CountyWinnebago, Fond du Lac, Calumet
Lake TypeDrainage
Coordinates44.0168, -88.4096
Deepest Natural Lakes in Wisconsin
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | Green Lake | Green Lake | 7,920 acres | 236 ft |
| 2 | Geneva Lake | Walworth | 5,401 acres | 135 ft |
| 3 | Elkhart Lake | Sheboygan | 292 acres | 119 ft |
| 4 | Trout Lake | Vilas | 3,864 acres | 117 ft |
| 5 | Little Trout Lake | Vilas | 1,007 acres | 98 ft |
Largest Lakes in Wisconsin
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | Lake Winnebago | Winnebago, Fond du Lac, Calumet | 131,939 acres | 21 ft |
| 2 | Lake Pepin | Pierce, Buffalo, Pepin | 24,550 acres | 60 ft |
| 3 | Petenwell Lake | Adams, Wood, Juneau | 23,173 acres | 44 ft |
| 4 | Chippewa Flowage | Sawyer | 15,300 acres | 92 ft |
| 5 | Lake Poygan | Winnebago, Waushara | 14,024 acres | 11 ft |
Sources: Wisconsin DNR lake data (WBIC 131100); USGS; Wisconsin Lakes (shallow-lake benchmark). Verified October 28, 2026.