Doctor Clarence Thomas Campbell (December 27, 1843[1] – 1922[2]) was a physician, historian and politician in Ontario, Canada.
The son of Thomas Campbell, a native of Ireland who was of Scottish descent, he was born in London and was educated there,[1] going on to study medicine at the Cleveland Western Medical College and the Homeopathic College of Philadelphia.
In 1906, Campbell was named inspector of post offices for London division.
He was a long-time member of the Medical Council of Ontario, also serving as its president.
[1] Campbell was married twice: first to Angeline Drake, who died in 1888, and then, in 1899, to Lottie Tyrrell.