Thomas Cavanagh (born October 26, 1963) is a Canadian actor.

Cavanagh was born in Ottawa, Ontario, Canada, and moved with his parents to a small city, Winneba, in Ghana when he was seven years old. In his teens, the family moved to Lennoxville, Quebec where he started high school. Tom went to high school at the Seminaire de Sherbrooke, in nearby Sherbrooke, where he studied in french and played basketball for the Barons. He later studied at Champlain College in Lennoxville at the CEGEP level. Thomas is fluently bilingual in French and English. While attending Queen's University in Kingston, Ontario, he became interested in theatre and music and played ice hockey and varsity basketball. He graduated with degrees in English, biology and education. Tom has an older brother who is a Crown Attorney and three sisters; one who is a Religion teacher and Chaplain in Ontario, Canada, another who is an Autism specialist in Toronto Ontario and another who is a Communications Writer in London, England. His parents are academics and writers.

Cavanagh is married to Maureen Grise, a photo editor for Sports Illustrated. They were married on July 31, 2004, in a Roman Catholic ceremony on Nantucket, Massachusetts. The couple have a daughter and a son. Cavanagh ran the 2006 New York City Marathon finishing in 3:29:31.