How many hosts have there been for the show jeopardy?

Alex Trebek is the current host of Jeopardy in the USA and has been since September 10 1984. Art Fleming hosted the original Jeopardy show from March 30 1964 until Jan 3 1975 as well as other short lived versions of Jeopardy. Derek Hobson (83-84)and Chris Donat (90-93) have been hosts in the United Kingdom. Bob Sander, Mal Walden, Graham Webb, & Andrew Harwood have been hosts in Australia (1970-1978) A link has been added below the answer information under related links for Jeopardy International that will provide a dozens of additional hosts of the international versions of Jeopardy.