Donald Blake Rix, CM OBC (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 ), 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.