Thomas Warner may refer to:

• Sir Thomas Warner (explorer) (1580–1649), English explorer, and settler of St Kitts
• Sir Courtenay Warner, 1st Baronet (Thomas Courtenay Theydon Warner, 1857–1934), British politician
• Tom Warner (born 1948), American politician
• Tom Warner (activist) (born 1952), Canadian gay rights activist
• Thomas Warner (poet) (born 1979), British poet
• Thomas Warner (bobsleigh), British bobsledder

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