Michael James Ritter passed away on November 11, 2026. He was born on May 7, 1941, in La Crosse, Wisconsin, to George and Margaret Ritter.

Mike proudly graduated from Aquinas High School in 1959 and continued his education at Saint Mary’s College and La Crosse State Teachers College.

On May 8, 1965, Mike married Bonnie Kay Voshart. They shared 55 years of marriage and a lifetime of memories together until Bonnie’s passing on November 30, 2020.

Mike enjoyed a 45-year career in the credit and collections industry, owning and operating agencies in DeKalb and Morris, Illinois. For five years, he and Bonnie lived in Colorado Springs, Colorado, where Mike owned and operated Colorado Adjustment Bureau. After returning to the La Crosse area, Mike began a new chapter of service, spending the next eight years driving a school bus for the La Crosse School District before retiring.

Mike was an avid reader who often purchased books from the library and later donated them back to be resold. He was also proud to serve on the Onalaska Library Board, where he played an instrumental role in bringing about important improvements to the library.

Mike enjoyed many of life’s simple pleasures, including playing in a men’s senior golf league, fishing, traveling to Mexico, and gathering with family for game nights. Friday night fish fries with his dear friend Jerry were another favorite tradition. And, of course, Mike was a devoted Green Bay Packers fan.

Mike is survived by his sisters, Judy Schreier and Barb Holte; his children, Dan (Donna) Ritter, Kristine (Steve Dennis) Ritter, and Angela (Mark) McCampbell; and his grandson, Robert.

A Celebration of Life will be held on Saturday, November 28, from 1:00 to 3:00 p.m. at The Gathering Place, 133 Mason Street, Onalaska, WI 54650. A brief time of sharing will take place at 2:00 p.m.

Mike will be remembered for his dedication to family, his commitment to his community, his love of reading and the outdoors, and the many friendships and memories he created along the way. He will be deeply missed by all who knew and loved him.