Donald P. McCormack, 77, of Mazon passed away peacefully October 1, 2022 at Lightways Hospice in Joliet, Illinois. Born in Morris, Illinois on August 12, 1945, he was the son of Forrest and Martha (Petry) McCormack. Don was a graduate of Mazon-Verona-Kinsman High School, Class of 1963. He married Janet Hill on July 20, 1973 at Verona Methodist Church and they resided in rural Morris. He served in the U.S. Army from 1965-1968. He was employed with Caterpillar Inc. in Joliet for 35 years. Don enjoyed gardening, reading, golf, and his Toy Manchester Terriers. He is survived by his wife, Janet; sister, Helen Griffiths; brothers: Charles (Marge) McCormack, Forrest “Cork” McCormack, William McCormack, James McCormack, and Kenneth (Raynell) McCormack. Don was preceded in death by his parents; brother, LaVerne “Bud” McCormack; sister, Dorothy Ashbaugh Haas; three brothers-in-law and four sisters-in-law. Visitation for Donald McCormack will be Thursday, October 6, 2022 from 5:00 p.m. – 7:30 p.m. at the Fred C. Dames Funeral Home, 1201 W. Route 6 (at Deerpath Dr.) in Morris. Funeral services will be held Friday, October 7, 2022, 10:00 a.m., at the Funeral Home. Interment will be in Mazon Brookside Cemetery. Military honors will be accorded. In lieu of flowers, memorials may be given in Don’s name to Lightways Hospice or Lurie Children’s Hospital. For more information, call (815) 942-5040, or visit his Memorial Tribute at www.fred cdames.com where you can share a favorite memory or leave a condolence.