Water Monster reports in Wisconsin
9 cases, best-documented first. Page 1 of 1.
We map claims, not creatures. A case is what some source says someone saw or heard, with the link to that source. It is not proof that anything was there, and a retelling counts once, not as a second sighting.

Water Monster · Door County, Wisconsin · 1883
Fishermen report seeing a large, black, hairy creature with an immense head and threatening teeth swimming alongside their boat off Death's Door.

Water Monster · Mud Lake, Wisconsin · 1907
Editor Hughes reports that Albert Keinhard captured a 'sea monster' in Mud Lake while fishing, which was then skinned and burned.

Water Monster · Lake Mendota, Wisconsin · 1899
Witnesses report seeing a large serpent with a ten-inch head and horned tail in Lake Mendota.

Water Monster · Milwaukee, Wisconsin · 1867
A gentleman and two ladies in Milwaukee saw the sea serpent appear suddenly while sailing on the bay.

Water Monster · Door County, Wisconsin · 1883
Two fishermen report an animal of similar description swimming alongside their boat and frightening them so badly they were taken sick.

Water Monster · Manitowoc, Wisconsin · 1867
Witnesses report that two young ladies in Manitowoc saw a dark bluish creature fifty or sixty feet long off the mouth of the river.

Water Monster · Town of Perry, Wisconsin · 1855
Four young men fishing and bathing in Silver Lake reported seeing a large serpent-like creature rising from the water.

Water Monster · Northport, Wisconsin · 1904
James Thorson reports being pulled into a river by an unknown monster while fishing at Northport.

Water Monster · Wisconsin · 1885
A Chicago journal reports that a large sea serpent was seen in Lake Michigan by at least two lake-faring men.