Michael Joseph Ryan may refer to:

• Michael Joseph Ryan (biologist) (fl. 1980s–2020s), American biologist
• Michael Joseph Ryan (doctor) (born 1965), Irish trauma surgeon and epidemiologist
• Michael Joseph Ryan (footballer) or Mike Ryan (1930–2006), English footballer
• Michael Joseph Ryan (media hoaxer) or Rocky Ryan (1937–2004), British media hoaxer

• Michael Ryan (disambiguation)
• Michael J. Ryan (disambiguation)

Topics referred to by the same term

This disambiguation page lists articles about people with the same name.
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