The Canadian Society for Medical Laboratory Science (CSMLS) is the national certifying body for medical laboratory technologists and medical laboratory assistants, and the national professional society for Canada's medical laboratory professionals. Incorporated in 1937 as the Canadian Society of Laboratory Technologists, the society has over 14,000 members in Canada and in countries around the world.

Its purpose is:

• To promote and maintain a nationally accepted standard of medical laboratory technology by which other health professionals and the public are assured of effective and economical laboratory services, and
• To promote, maintain and protect the professional identity and interests of the medical laboratory technologist and of the profession.