She graduated from Clayton, New Mexico High School. After high school, she attended Emmanuel College in Franklin Springs, Georgia; Eastern New Mexico University in Portales, New Mexico; and the University of Oklahoma.
She was a member of the Oklahoma Society of Certified Public Accountants and Delta Pi Epsilon.
She worked extensively with children and as treasurer of her church. She taught at Emmanuel College, Sharon Bible School, and Southwestern Christian University where she also served as registrar for over thirty years.
She married C. Edwin Ditto on October 23, 1993.
She was preceded in death by her husband C. Edwin Ditto, her parents George and Mary Selby; her brothers-–John, Foster, Leonard, and George; and her sisters–-Alice Welch, Gertrude Ditto, and Leola Classon.
Survivors include Dewayne (Marilyn) Ditto, Eugene, Oregon; Jacquetta (Bob) Varner, Roseburg, Oregon; Patsy (Greg) Needham, Greenfield, Indiana. Sisters-–Laverne Murr, Oklahoma City; Lydia Crim, Mexico Beach, Florida; nephew–-Robert P. Hall, Oklahoma City; and numerous other nieces and nephews.
Funeral services will be Saturday, June 17, 2017 at 2:30 p.m. at Chapel Hill Memorial Gardens Chapel with burial at Chapel Hill Memorial Gardens Cemetery.
[Editor's comment: In the providence God He allowed me to be the third president of Southwestern College in Oklahoma City. I was honored and privileged to meet Mary Selby. Her name was synonous with Southwestern College. She was the first registrar of the college and was the secretary to Dr. R. O. Corvin, the founder and first president of Southwestern College. Her life and legacy will continue to live in the hearts of countless thousands of people she touched. I bless her life of service to Southwestern College, to her church and community.]