Mary Ann (Boos) Fitzgerald, of Momence, Illinois, born on January 23, 1948 in Illinois, to the late Mary V Kulpa and the late Bernard M. Boos, passed away at age 70 on July 8, 2018 in Boulder, Colorado. Mary Ann graduated from Front Range Community College. She was a LPN Nurse in the geriatrics industry until retiring in 2004. Mary Ann was preceded in death by her brother, Michael Boos. She is survived by her son, Jack H Fitzgerald; daughters, Shelly M Fitzgerald and Katie M Marsh; brother, Bernard M Boos Jr.; grandchildren, Riley Fitzgerald, Jackson Fitzgerald, Katie Fitzgerald, Jacob Marsh, Jared Marsh, and McKenzie Marsh; and sons-in-law Jeff Marsh and Randal Resseguie, and daughter-in-law Carry Fitzgerald. Friends and family members may attend the funeral service on Friday, July 13 at 2:00 p.m. at Sacred Heart of Jesus Church, 1318 Mapleton Ave, Boulder, Colorado, 80304. The funeral home will be Crist Mortuary, 3395 Penrose Place, Boulder, 3034424411. She was a beloved mother and friend to many and will be greatly missed.