Thomas Jeffrey (surname also recorded as Jeffery, Jeffries, Jeffreys or Jefferies) was a convict bushranger, murderer and cannibal in the mid-1820s in Van Diemen's Land (now Tasmania, Australia). In contemporary newspaper reports of his crimes he was frequently described as a 'monster'. Jeffrey and three other convicts absconded from custody in Launceston in December 1825 and were subsequently responsible for five murders, characterised by extreme violence, including the killing of a five month-old infant. Another victim was a member of the gang, killed while he slept and his flesh consumed by his companions. Jeffrey was captured in January 1826; he was tried in Hobart and convicted of various of his crimes. Jeffrey was executed by hanging at Hobart in May 1826.