Thomas Montgomery may refer to:Thomas Montgomery (1779–1828), U.S. Representative from Kentucky Thomas Montgomery (1700–1761), Irish politician Thomas Harrison Montgomery (1830–1905), American businessman and historian Thomas Harrison Montgomery Jr. (1873–1912), American zoologist Thomas Hartley Montgomery (1842–1873), senior official of the Royal Irish Constabulary Thomas Lynch Montgomery (1862–1929), American librarian from Pennsylvania Thomas M. Montgomery, American military officer Thomas Montgomery (innkeeper) (1790–1877), Upper Canada militia officer and innkeeper in modern-day Etobicoke Thomas Montgomery (murderer), American murderer