William “Bill” Siegenthaler, age 76, of Monroe passed away on Wednesday, October 28, 2026, in the comfort of his home. He was born on December 29, 1949, the son of Fritz and Edith (Mohalman) Siegenthaler, in Freeport IL. Bill graduated from Park Rapids High School in Minnesota and then proudly served in the United States Army. He was united in marriage to Barbara Leverton on November 20, 1971. They shared 55 Years together, filled with joy and heartache, laughter, and tears, but always love.

Bill worked at Joseph Huber Brewery for 43 years, retiring on December 29, 2014. He enjoyed fishing and camping and was an avid fan of the Wisconsin Badgers and Green Bay Packers. He was known for his charming personality and his witty comebacks. Above all, he loved spending time with his family.

Bill is survived by his wife Barb; children, Travis Siegenthaler of Monroe, Krissy (Cole) Markgraf of Deforest, and Kimberly (Chad) Thostenson of Janesville; 7 grandchildren, Alex, Reece, Violet, and Finnley Markgraf; Mariah and Paxton Siegenthaler; and Oliver Thostenson; siblings, Kathy Luedy of Monroe, Linda (George) Rabe of Mt. Calvary, and Robert (Peggy) Siegenthaler of Monroe; and loving family, the Ritters, Levertons, Gerloffs, Youngs, and Reynolds, as well as special friends, Vicki and Nate Phillipps of Monroe.

He was preceded in death by his parents; brother, Fritz; cherished granddaughter, Cameron; niece, Ashley Ritter; and brothers-in-law, Carson Gerloff, and Robert Luedy; and many beloved pets.

Funeral Services will be held on Thursday, November 5, 2026, at 11:00 a.m. at Shriner Hager Gohlke Funeral Home with Reverend Steve Young (brother-in-law) officiating. Burial will follow at Greenwood Cemetery.

Visitation will be held on Thursday from 10:00 a.m. until the time of service at the funeral home.

Condolences may be sent to the family at: shgfuneralhome.net.

Memorials may be given in Bill’s name to the Green County Humane Society.