Mary C. Grannis, 61 of Endicott, passed away peacefully, Sunday, May 24, 2020 after a short illness. She was predeceased by her parents, Cliff and Catherine (Como) Grannis. She is survived by five siblings, Jeanne Ayers, Robert, Gary, Rick and Chris Grannis; a special niece and Goddaughter, Madelynn Thompson,, also several other nieces, nephews and cousins. She was a loving sister and aunt who will be dearly missed. Due to the current gathering restrictions, memorial services will be announced at a later date.