Others
- Thomas Smith (Bishop of Carlisle) (1615–1702), English Anglican bishop
- Thomas Smith (Vicar Apostolic of the Northern District) (1763–1831), English Roman Catholic bishop
- Thomas Smith (scholar) (1638–1710), English antiquarian
- Thomas Smith (painter) (died 1688), American artist and mariner
- Thomas Smith (Derby) (died 1767), English landscape painter
- Thomas L. Smith (1801–1866), also known as "Pegleg", American mountain man
- Thomas R. Smith, American poet
- Thomas J. Smith (1830–1870), town marshal of Old West cattle town Abilene, Kansas
- Thomas James Smith (1827–1896), founder of Smith & Nephew, one of the United Kingdom's largest medical devices businesses
- Thomas Sydney Smith, Indian lawyer; Advocate General of Madras, 1861–1863
- Thomas Smith (East India Company) (1558–1625), English merchant and the first governor of the East India Company
- Thomas Assheton Smith I (1752–1828), English landowner and all-round sportsman
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