Truett is both a given name and surname. Notable people with the name include:
Truett S. Beasley (born 1953), American comedian known as Killer Beaz
Truett Sewell (1907–1989), American baseball player known as Rip Sewell
Truett Smith (1924–2000), American football player
Alexander H. Truett (1833–?), American soldier
Geoff Truett (1935–2015), English footballer
George Washington Truett (1867–1944), American clergyman