Michael Letterlough (born 26 September 1984) is a Caymanian track and field athlete competing in the hammer throw.

After graduating from John Gray High School on Grand Cayman, Letterlough attended Florida International University in Miami and currently trains under the guidance of Anatoliy Bondarchuk in Kamloops, British Columbia.

[1] During the course of his athletic career at Florida International, Letterlough won the 2006 Sun Belt Conference championship,[2] set school records in the hammer throw and weight throw[3] and was named Sun Belt Conference athlete of the week.

Letterlough then moved north at the end of 2007 to join Bondarchuk's training group in Canada.

He most recently improved the record of 62.54m on 5 June 2011 in Kamloops, British Columbia, Canada.