Lakes / Wisconsin / Mercer Lake
Mercer Lake, Iron County, Wisconsin
181 acres
Surface Area
24 ft
Max Depth
11 ft
Average Depth
1,584 ft
Surface Elevation
Where It Sits, and How Deep It Goes
Locator - Wisconsin
46.16 degrees N, 90.07 degrees W - Iron 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 - Mercer Lake
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 Mercer Lake Stacks Up
- About 216 miles from Madison, as the crow flies.
- 7 fish species on the DNR list for this lake.
Fish Species
MuskyPanfishLargemouth BassSmallmouth BassNorthern PikeWalleyeSturgeon
Species recorded for this lake. Presence only - no abundance ratings.
Facts and Figures
Waterbody ID (WBIC)2313600
CountyIron
Lake TypeDrainage
Coordinates46.1616, -90.0674
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 | Beaver Dam Lake | Barron | 1,163 acres | 106 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 | Lake Chippewa | Sawyer | 14,593 acres | 92 ft |
| 5 | Lake Poygan | Winnebago, Waushara | 14,024 acres | 11 ft |
Sources: Wisconsin DNR lake data (WBIC 2313600); USGS; Wisconsin Lakes (shallow-lake benchmark). Verified October 28, 2026.