Thomas (or Tom) Buchanan is the name of:
- Thomas Buchanan (moderator) (died 1599) Moderator of the General Assembly of the Church of Scotland in 1588
- Thomas Buchanan (Liberal politician) (1846–1911), Scottish Liberal politician, Under-Secretary of State for India
- Thomas Buchanan (Unionist politician) (born 1963), Northern Ireland politician
- Thomas Buchanan (Governor of Liberia) (1808–1841), first governor of Liberia and cousin of James Buchanan, president of the United States
- Thomas Buchanan (priest) (1833–1924), Archdeacon of Wilts from 1874 until 1911
- Thomas Buchanan Read (1822–1872), American poet and painter
- Tom Buchanan (historian) (born 1960), British historian
- Tom Buchanan, a fictional character in The Great Gatsby
- Tom Buchanan, a contestant on Survivor (American TV series)
This disambiguation page lists articles about people with the same name.
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