O'Hara may refer to:
Place names Cardinal O'Hara High School (Springfield, Pennsylvania), United States Lake O'Hara, a lake in Yoho National Park, British Columbia, Canada O'Hara Glacier, a glacier in Antarctica O'Hara Township, Allegheny County, Pennsylvania, United States
Other uses O'Hara (surname) O'Hara, an 1825 novel by William Hamilton Maxwell O'Hara (band), a 1960s Yugoslav rock band O'Hara, U.S. Treasury, a 1970s crime television series The People Against O'Hara, a 1951 film starring Spencer Tracy The Book of O'Hara (Leabhar Í Eadhra), a 1951 collection of poetry from the royal O'Hara family, edited by Lambert McKenna
See also Ohara (disambiguation) O'Hare (disambiguation) Justice O'Hara (disambiguation)