Michael J. Ryan

Michael J. Ryan may refer to:

• Michael J. Ryan (athlete) (1889–1971), winner of the 1912 Boston Marathon
• Michael J. Ryan (biologist) (), American biologist
• Michael J. Ryan (doctor) (born 1965), Irish epidemiologist, surgeon, and chief executive director of the WHO Health Emergencies Programme
• Michael J. Ryan (Irish politician) (died 1952), Irish barrister, professor and politician
• Michael J. Ryan (Philadelphia politician) (1862–1943), president of the United Irish League of America
• Michael James Ryan or Mike Ryan (1941–2020), American baseball player
• Michael Joseph Ryan (footballer) or Mike Ryan (1930–2006), English footballer
• Michael Joseph Ryan (media hoaxer) or Rocky Ryan (1937–2004), British media hoaxer

See also

• J. Michael Ryan (born 1957), American judge
• Michael Ryan (disambiguation)
• Michael Joseph Ryan (disambiguation)