Michael O'Hara may refer to:
Athletes Michael O'Hara (athlete) (born 1996), Jamaican sprinter Michael O'Hara (volleyball) (1932–2018), American Olympic volleyball player
Writers Mike O'Hara (reporter), (born 1946) American reporter Michael O'Hara (writer), American screenwriter
Other Michael D. O'Hara (1910–1978), American jurist Michael John O'Hara, (1933—2014) British geologist Michael M. O'Hara (born 1959), American educator, author, and historian of theatre