Reported Crop Circles for the State of Wisconsin -

Mukwonago, Waukesha County (February, 1987)

A 60-foot diameter circle was discovered by a pilot flying over a large swamp. The circle was located near the edge of the swamp and nearly devoid of plants. It was noted at the time to be in close proximity to a microwave tower.

Eyewitness report only.

Crop type: marsh grass

Source: Jeffrey Wilson

City / County / Date:

• Woodman, Grant County
  (July, 1980)
• Blanchardville, Lafayette County (September 5, 1981)
• Foster's Tree Farm [city unknown], (September, 1984)
• Dundee, Monroe County
  (May, 1985)
• Mukwonago, Waukesha County (February, 1987)
• Kenosha, Kenosha County
  (May 2, 1993)
• Milwaukee, Milwaukee County (August 14, 1994)
• Long Lake, Florence County
  (July 5, 1995)
• Wausau, Marathon County (August 13, 1997)
• Wausau, Marathon County (August 16, 1997)
• Port Washington, Ozaukee County (July 10, 1998)
• [Unknown], (1998)
• Verona, Dane County
  (October 3, 1999)
• Mayville / Kekoskee, Dodge County (July 4, 2003)
• Theresa, Dodge County
  (July 11, 2003)
• Mayville, Dodge County
  (July, 2003)
• Mayville, Dodge County
  (August 8, 2003)
• Clyman, Dodge County
  (August 8, 2003)
• Mayville, Dodge County
  (August 9, 2003)
• Tilden / Chippewa Falls, Chippewa County (July 19, 2004)
• Wausau, Marathon County (August 27, 2004)
• Trevor, Kenosha County
  (June 21, 2005)
• Mayville, Dodge County
  (July 6, 2005)