Mary Kay Schnitzius, 85, of Huntley, passed away peacefully surrounded by her loving family on December 28, 2025. She was born on December 5, 1940 in Chicago to the late Michael and Annamae O’Connell.
On July 13, 1963, she married the love of her life, Edward Schnitzius, at Visitation Catholic Church in Chicago, Illinois. Together, they shared 62 beautiful years of marriage and were blessed with three children. She began her professional life in education, teaching 3rd grade for five years in both Chicago and Florida. She later transitioned into a career in accounting with UOP–Honeywell, where she found great fulfillment until her retirement. Her faith and compassion were at the heart of everything she did. Mary Kay was deeply involved with Mount St. Joseph, where her sister was a resident, and she devoted countless hours to supporting and uplifting the community there.
Together, Mary Kay and Ed loved to travel, especially to their home in Bradenton, Florida, and their cherished cottage in Stockbridge, Wisconsin, which served as a joyful retreat filled with relaxation, laughter, and treasured memories.
Above all else, Mary Kay was devoted to her family. She found her greatest happiness in spending time with those she loved.
In addition to her devoted husband, Edward, she is survived by her children, John (Beula) Schnitzius, Michael Schnitzius, Kathleen (Jerome) Scheuing; grandchildren, Rebecca (Vincent), Megan, Alyssa (Lars), Evan (Jessie), Logan, Caleb, Sienna; great-grandchildren, Miles and Avy; her siblings, Jack (Karen), Jim, Peg, Eileen (Tom), Bill (Jane).
She was preceded in death by her parents, her sister, Rita O’Connell; sisters-in-law, Katie and Marcy
Visitation will be Friday, January 9, 2026 from 9 AM until the funeral mass at 10 AM at 10307 Dundee Road, Huntley, IL 60142. All are invited to go directly to church. Private family burial will take place at All Saints Catholic Cemetery.
In lieu of flowers, donations may be made to Mount St. Joseph, 24955 North Rand Road, Lake Zurich, Illinois 60047, www.mtstjoseph.org/
