Cover photo for Mary Katherine Sisk's Obituary
Mary Katherine Sisk Profile Photo

Mary Katherine Sisk

February 12, 1947 — February 15, 2021

Mary Katherine Sisk

Mary Katherine (Tiblow) Sisk was born February 12, 1947 in Sperry, OK, to Charles and Nora (Gibson) Tiblow. She passed away peacefully with her children by her side on February 15, 2021 in Collinsville, OK.

Mary was the 2nd youngest of nine children. Mary graduated from Sperry High School in 1966. After high school, Mary met and married the love of her life, Stephen Robert Sisk. Mary worked for Saint Simeon’s Senior Living for many years and she loved her residents and would bring them treats. Mary was the cook of the house when she was growing up. She was known for her ability to feed a crowd and hosted many family gatherings. Her fry bread was always a hit.

Mary was a faithful member of the church and even when in poor health, she would be found worshipping her Heavenly Father from home. Mary’s life was simple, and her laugh, smile and love were contagious. Mary was a God-fearing woman who loved her husband, her kids, and grandkids with all her heart. Her life touched so many other’s lives.

She is survived by her son, Robert Sisk and wife, Margaret; daughters, Kelly De LaCruz, Tracy Isam and Katherine Still and husband, Corey; grandchildren, Thomas Isam and wife, Sidney, Stephen Sisk and wife, Coree, Tiffany Isam, Trustin Still, Manuel De LaCruz, Shylah Still, and Cannon Still; great-grandchildren, Brooklynn Isam, Shanley Isam, Stella Isam, Luca Sisk and Axel Sisk; sisters, Judy Duty and husband, Ed, Monty Eason and husband, Karl and Frances Lenard; sister-in-law, Barbara Tiblow; and many other relatives and friends.

She was preceded in death by her husband, and love of her life, Stephen Sisk; granddaughter, Blake Sisk; parents, Charlie and Nora Tiblow; sisters, Linda Tiblow, Norma Remington and Betty George; and brothers, Sam Tiblow and Charles Tiblow.

A memorial service will be held at a later date.

Arrangements and services were entrusted to Johnson Funeral Home, Sperry.

Online condolences to the family can be made at

To order memorial trees or send flowers to the family in memory of Mary Katherine Sisk, please visit our flower store.

Past Services


Saturday, February 20, 2021

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