Jack Garrett (22 May 1914 – 11 September 1977) was an Irish Fianna Fáil politician, who was a member of Seanad Éireann from 1969 to 1981. A public works contractor, he was first elected to the Seanad in 1969 by the Administrative Panel. He was re-elected at the 1973 and 1977 elections. He died on 11 September 1977 before the 14th Seanad had first met. The by-election caused by his death was held on 7 December 1977 and was won by the Fianna Fáil candidate Michael Donnelly.