Lakes / Wisconsin / Fond du Lac County
Lakes in Fond du Lac County, Wisconsin
8 lakes counted in Fond du Lac County - the largest is Lake Winnebago at 131,939 acres.
8
Lakes Counted
131,939 acres
Largest - Lake Winnebago
47 ft
Deepest - Long Lake
Fond du Lac County, highlighted, with its largest counted lakes dotted. Outlines from Census boundary data.
All Counted Lakes
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | Lake Winnebago | Winnebago, Fond du Lac, Calumet | 131,939 acres | 21 ft |
| 2 | Rush Lake | Fond du Lac, Winnebago | 2,729 acres | 5 ft |
| 3 | Long Lake | Sheboygan, Fond du Lac | 423 acres | 47 ft |
| 4 | Mullet Marsh 15 Reservoir | Fond du Lac | 344 acres | None ft |
| 5 | Kettle Moraine Lake | Fond du Lac | 209 acres | 30 ft |
| 6 | Mullet Lake | Fond du Lac | 190 acres | 7 ft |
| 7 | Eldorado Marsh | Fond du Lac | 145 acres | None ft |
| 8 | Supple Marsh | Fond du Lac | 107 acres | None ft |
Sources: Wisconsin DNR lake data; USGS. Verified October 28, 2026.