Thomas Garrett (1789–1871) was an abolitionist and leader in the Underground Railroad movement before the American Civil War.

Thomas, Tom or Tommy Garrett may also refer to:

• Thomas Garrett (Australian politician) (1830–1891), New South Wales politician, newspaper proprietor and land agent, father of the cricketer
• Tom Garrett (1858–1943), Australian cricketer and public servant, son of the politician
• Snuff Garrett (Thomas Lesslie Garrett, 1938–2015), American record producer
• Thomas A. Garrett (born 1962), American fast food restaurant executive
• Thomas Garrett (bishop), Anglican bishop in the Church of South India
• Tom Garrett (Virginia politician) (born 1972), U.S. Representative from Virginia
• Tommy Garrett (footballer) (1926–2006), English footballer
• Tommy Garrett (Nebraska politician) (born 1954), American politician from Nebraska