Tom, Thomas or Tommy Johnston may refer to:

• Thomas D. Johnston (1840–1902), U.S. Representative from North Carolina
• Thomas Johnston (Canadian politician) (1821–1903), Canadian industrial and political figure
• Thomas George Johnston (1849–1905), Canadian physician and political figure
• Tom Johnston (Saskatchewan politician) (1881–1969), British-born Canadian political figure
• Tom Johnston (British politician) (1881–1965), Scottish political figure

• Tom Johnston (footballer) (1918–1994), Scottish midfielder; playing career 1938–1956; coaching and managerial career 1956–1978
• Tom Johnston (greyhound trainer) (1933–2001), British greyhound trainer
• Tommy Johnston (1927–2008), Scottish footballer

• Thomas Jack (Tom Jack Johnston, born 1993), Australian DJ and musician; pioneer of the "tropical house" subgenre
• Tom Johnston (musician) (born 1948), American musician, co-founder of The Doobie Brothers

• Thomas Johnston (engraver) (1708–1767), American engraver and organ builder
• Thomas A. Johnston (1848–1934), American educator
• Thomas Alan Johnston, Scottish engineer
• Thomas Brumby Johnston (1814–1897), Scottish cartographer
• Thomas E. Johnston (born 1967), US federal judge
• Thomas Henry Johnston (1880–?), New Zealand tram conductor, labourer, miner and strike-breaker
• Thomas L. Johnston (1927–2009), Scottish scientist
• Thomas Nicol Johnston (1870–1923), Scottish zoologist
• Thomas Harvey Johnston (1881–1951), Australian biologist and parasitologist
• Thomas Henry Johnston (British Army officer) (died 1891)
• Thomas W. "T. J." Johnston Jr. (born 1956), American lawyer and Anglican bishop

• Thomas Lipton (1848–1931), Scottish merchant and personality; created Lipton tea brand; also known as Sir Thomas Johnstone Lipton
• Thomas Johnson (disambiguation)

This disambiguation page lists articles about people with the same name.
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