Catherine Clark-Mayo

November 10, 2026, Cathy, 83, passed away peacefully in Oswego in the comfort of the home she loved. She was born March 10, 1943, the daughter of Madeline (O’Neil) and Scott Clark. Cathy grew up on Tipperary Hill and was proud of her Irish heritage, travelling to Ireland four times. She graduated from St Patrick’s school and continued her college education through the Sisters of St Joseph at the College of St Rose in Albany. She furthered her education at Syracuse University attaining her certification in Special Education, followed by a master’s degree and Certificate of Advanced Studies at SUNY Oswego.

Cathy began her teaching career in 1966 in the parochial schools, was employed by Oswego BOCES as a teacher and administrator, retiring in 1988 from Mexico Academy and Central Schools where she served as the Director of Pupil Personnel and principal at Palermo Elementary. Cathy took great pride in mentoring colleagues, helping them find their confidence, discover their strengths, and develop their passion for educating children which continued into her retirement.

Cathy married Kate Clark-Mayo, the love of her life for over 50 years, in 2011. They travelled extensively including African safaris and a trek to see Rwandan gorillas. She loved to laugh, party, and entertain a variety of friends, family, and neighbors.

Cathy was predeceased by her parents and her sister Joanne for whom she provided loving care. She is survived by a loving family, including her wife Kate, cousins Robert (Mary Ellen) O’Neil, Thomas O’Neil, and Edward McSweeney, and sister-in-law Virginia Ruf. She shared Kate’s children, Megan (Nick) Trotter-Mayo, Mo Mayo and grandchildren Lily, Finn, Griffin, and Stella.

Cathy was a volunteer for Literacy Volunteers and Oswego County Hospice. To honor her, in lieu of flowers, donations may be made to Hospice of Central New York and the Finger Lakes at 990 7th North Street, Liverpool 13088.

Calling hours will be held at Nelson Funeral Home, 11 West Albany Street on Saturday, November 14, 2026 from 10AM to noon. A celebration of life will follow at the Oswego Country Club.