•
Michael Ryan (printer) (1784-1830), Canadian publisher and editor of the Barbados Globe. •
Michael Ryan (physician) (1800–1840), British physician and author •
Michael Clarkson Ryan (1820–1861), American attorney who was one of eight founders of Beta Theta Pi •
Michael Kennedy Ryan (1868–1925), Irish Catholic priest, teacher and supporter of the Gaelic Athletic Association •
Michael P. Ryan (USMC) (1916–2005), US Marine Corps general •
Michael E. Ryan (born 1941), former Chief of Staff of the US Air Force •
Michael D. Ryan (1945–2012), associate justice of the Arizona Supreme Court •
Michael W. Ryan (1948–2015), death row inmate in Nebraska •
Michael Ryan (chef) (born 1953), Irish Michelin starred head chef of Arbutus Lodge •
Michael Ryan (mass murderer) (1960–1987), perpetrator of the Hungerford massacre •
Michael J. Ryan (doctor) (born 1965), Irish doctor and chief executive director of the WHO Health Emergencies Programme •
Michael J. Ryan (biologist), American biologist •
J. Michael Ryan, associate judge on the Superior Court of the District of Columbia •
Michael A. Ryan, US Army general ==See also==