Michael O'Reilly may refer to: Michael O'Reilly (hunger striker), Irish revolutionary and one of the longest hunger strikers in history Michael O'Reilly (boxer) (born 1993), Irish boxer Michael O'Reilly (prelate) (died 1758), Irish bishop of Derry Mikey O'Reilly (born 2002), Irish cricketer Michael O'Reilly (runner), English long-distance runner and winner of the 1992 Japan Marathon Championships Michael O'Reilly (voice actor), Canadian voice actor in Young Robin Hood and other animated series Michael O'Rielly, U.S. Federal Communications Commissioner