John Edward Thomas (9 April 1926 – 14 October 1996) was a British-born Canadian philosopher and pioneer of medical ethics in Canada.

Thomas married Muir in 1947 and they left the United Kingdom for Canada, where they settled in St. Catharines, Ontario.

John Thomas completed the masters and doctorate programs (PhD) at Duke University in 1960.

His second-year philosophy (2D3) 3 credit course, Medical Ethics and Human Life, was very successful with thousands having taken the class.

He was also Adjunct Professor of Medicine at McMaster University's Faculty of Health Sciences.