Thomas D'Arcy Leonard (April 29, 1895 – May 25, 1977) was a Canadian Senator and corporate executive.
In the 1930s, he became solicitor for the Canada Permanent and Canada Permanent Trust as well as legal counsel for Dominion Mortgage and Investment and the Trust Companies Association of Ontario.
[1] From 1951 to 1958, he served as president and general manager of Canada Permanent Trust and Continental Life Insurance and Triarch Corporation.
[2] He sat in the body as a Liberal until April 29, 1970, when he voluntarily retired at the age of 75.
[3] After retiring from the Upper House he served as chairman of St. Michael's Hospital's building fund campaign.