Thomas Campbell may refer to:
- Thomas Campbell (clergyman) (1763–1854), American religious leader
- Thomas Campbell (poet) (1777–1844), Scottish poet
- Thomas Jefferson Campbell (1786–1850), American politician
- Thomas Mitchell Campbell (1856–1923), American politician, Governor of Texas
- Thomas Joseph Campbell (1871–1946), Irish politician, journalist & jurist
- Thomas Edward Campbell (1878–1944), American congressman from New York
- Tom Campbell (cricketer) (1882–1924), South African wicket-keeper
- Thomas Hardesty Campbell (1907–1989), American Cumberland Presbyterian minister
- Tom Campbell (Canadian politician) (born 1927), Canadian mayor of Vancouver
- Thomas Campbell (coach), college football head coach
- Tom Campbell (California politician) (born 1952), American economist
- Thomas Campbell (visual artist) (born c. 1969)
- Tom Campbell (radio personality) (fl. late 20th century), American radio personality and voice actor
- Tom Campbell (Washington politician)
- Tommy Campbell, Scottish former footballer (born 1935)
- Tom Campbell Black, English aviator
- Thomas P. Campbell, Director of the Metropolitan Museum of Art