Tom or Thomas Knight may refer to:
Politicians Thomas Knight (Australian politician) (born 1935), Australian politician Thomas Knight (MP for Shrewsbury) (c. 1475–1518/20), English politician Thomas Knight (MP for Kent) (1735–1794), English politician Thomas Knight (MP for Canterbury) (c. 1701–1781), English politician Thomas E. Knight Jr. (1898–1937), American lawyer and politician T. Fenton Knight, member of the California State Assembly Thomas Knight (Newfoundland politician) Thomas John Knight (1804–1870), English politician in Tasmania
Sports Tommy Knight (footballer) (1865–?), English footballer Tom Knight (cricketer) (born 1993), Derbyshire cricket player Tom Knight (American football) (born 1974), former American football cornerback
Actors Thomas Knight (actor) (died 1820), English actor and dramatist Tom Knight (actor), played Mr Granger in Harry Potter and the Chamber of Secrets Tommy Knight (born 1993), child actor, best known for playing Luke Smith in The Sarah Jane Adventures
Others Thomas Andrew Knight (1759–1838), horticulturalist and botanist Tom Knight (scientist), American computer scientist Thomas Knight (murderer) (1951–2014), American fugitive executed in Florida Thomas Frederick Knight (1828-1902), Canadian naturalist and author