Mark Edgar Collum passed away Dec. 10, 2025. He was born Dec. 18, 1951, in Marion, IA, and spent most of his childhood in Shawnee, OK. Mark attended Vanderbilt University upon graduation from Shawnee High School in 1970. He graduated from Oklahoma State University in 1974 and then obtained his Juris Doctorate from Oklahoma City University School of Law in 1978. He practiced law in Oklahoma City for several years, worked as Chief Deputy for the Oklahoma County Court Clerk, and after two decades of service, retired from the Department of Human Services as Budget Manager in 2017.
On July 1, 1978, he married Jan Dipboye. They had two children, Doug (Kate) Collum of Denver, Colorado, and Evangeline (Jason) Shockley of Steamboat Springs, Colorado. Mark loved his family and delighted in his role of “Pops” to his grandchildren, Irie and Van Collum, and Ophelia and Vespa Shockley.
He was preceded in death by his parents Hugh and Catharine Collum.
He is survived by his wife; his two children: Doug (Kate) Collum of Denver, CO and Evangeline (Jason) Shockley of Steamboat Springs, CO.;grandchildren: Irie and Van Collum, and Ophelia and Vespa Shockley; his brother, David (Shari) Collum of Shawnee, OK; sister, Leslie Ann (David Penn) Collum of Murfreesboro, TN and sister-in-law Debbie Dipboye (Jerry) Griffin of Bethany, OK.
A celebration of life will be held at the Emmanuel Episcopal Church in Shawnee on April 11, 2026 at 2:00 pm. Memorial contributions may be directed to the Stephenson Cancer Center, Oklahoma City, OK in the care of the OU Foundation.
