Donald Blake Rix, (1931 – November 6, 2009) was a Canadian pathologist, philanthropist, community volunteer, and businessman. He was the founder and chair of MDS Metro Laboratory Services (now known as LifeLabs Medical Laboratory Services), the largest private medical laboratory in Western Canada.
He was a member of several organizations and foundations including the BC Innovation Council, BC Cancer Agency Foundation, BC Medical Services Foundation, and the BC Children's Hospital Foundation and was the chairman of the Board of Governors of UNBC.
Dr. Rix earned a specialty certificate in general pathology in 1968 from the University of Western Ontario. He was a fellow of the College of American Pathologists, the Royal College of Physicians and Surgeons of Canada, the Royal Society of Medicine, and the American Society of Clinical Pathologists. He was awarded honorary doctorates by the British Columbia Institute of Technology (BCIT) and the University of Western O