Thomas Kennedy or Tom Kennedy could be:

• Thomas L. Kennedy Secondary School, a high school in Mississauga, Ontario, Canada.
• Thomas Laird Kennedy, a politician in Ontario, Canada.
• Thomas Kennedy (1776-1832), a politician in Maryland, United States
• Thomas Kennedy (Australian politician) (1860-1929), a 20th century Australian politician
• Thomas Kennedy (unionist) (1887-1963), president of the United Mine workers
• Tom Kennedy, an American television game show host.
• Tom Kennedy (journalist), a Canadian journalist.
• Thomas Francis Kennedy (1788-1879), Scottish Member of Parliament.
• Tom Kennedy (UK politician) (1875-1954), Scottish Member of Parliament.
• Tom Kennedy (American actor) (1885-1965), American actor.
• Tom Kennedy (boxer), a bare-knuckle boxer.
• Tom Kennedy, a recurrent fictional character on the Australian soap opera Neighbours, played by Bob Hornery.
• Tom Kennedy, a mathematicial physicist at the University of Arizona, United States.