Mary Lou Stephany

Mary Stephany, beloved sister, aunt, friend and educator, passed away on November 12, 2026, leaving behind a remarkable legacy of education, service, and love for her dear friends and family. 

Mary was the loving daughter of the late Henry and Evelyn Stephany and the devoted sister of Stephen Stephany (Kathleen). She was a proud aunt to Lynley Smith (Brian), Shannon Hammond (Josh), and Matthew Stephany (Jackie), and great-aunt to Jane, Henry, Emmett, and Graham. She also shared a special affection for her dog, Chelsea, who brought her much happiness and companionship. 

Mary dedicated her professional life to Catholic education, spending more than five decades serving the students and community of Mother Theodore Guerin High School and its successor, Guerin College Preparatory High School, in River Grove, Illinois. 

A graduate of Marian University in Fond du Lac, Wisconsin, Mary began her teaching career in 1965 and became a beloved member of the Guerin community. As a social science educator, she taught a remarkable range of subjects, including U.S. History, American Government, Economics, Sociology, World History, European History, Humanities, Law, and Advanced Placement courses. Her dedication to education and lifelong learning earned her numerous professional distinctions, including the Cardinal's Award for Distinguished Service in Education. 

Mary's commitment to service extended well beyond the school community. She served on the Illinois Fifth Congressional District Academy Review Board, helping evaluate candidates for appointments to the nation's military service academies. Through this work, she helped identify and encourage young people whose character, leadership, academic preparation, and commitment to service would prepare them to serve our country. In 2013, Congressman Mike Quigley formally recognized Mary in the Congressional Record, honoring her decades of dedication to education and public service and acknowledging the profound influence she had on the lives and futures of her students. 

Perhaps the greatest testament to Mary's impact could be found in the countless former students whose lives she touched. Her influence reached far beyond the classroom, leaving an enduring mark on generations of young people. 

Her family is grateful for the many years they shared with her and for the lasting legacy she leaves behind. In lieu of flowers consider a donation to St. Jude's Children's Hospital.