O'Hanlon is an Irish surname associated with the Ó hAnluain sept. As with other similar names, the added prefix "O'" means "son of" (Hanlon).

Notable people with that surname include:

• Ardal O'Hanlon (born 1965), Irish comedian
• Evan O'Hanlon (born 1988), Australian Paralympian
• Fergal O'Hanlon (1936–1957, Irish Republican Army member
• Fran O'Hanlon (born 1948), Lafayette Leopards men's basketball head coach
• George O'Hanlon (1912–1989), American actor
• John O'Hanlon (chess player) (1876–1960), Irish chess master
• John O'Hanlon (Lackaghmore) (1889–1920), Sinn Féin member shot during the Irish War of Independence
• John O'Hanlon (politician) (1872–1956), Irish politician and journalist
• John O'Hanlon (writer) (1821–1905), Irish priest and writer
• Killian O'Hanlon (born 1993), Gaelic footballer
• Michael E. O'Hanlon (born 1961), American policy consultant
• Michael F. O'Hanlon (1890–1967), Irish politician
• Paddy O'Hanlon (1944–2009), Irish politician
• Pat O'Hanlon, (born 1991), Australian Rugby League player
• Redmond O'Hanlon, British writer
• Redmond O'Hanlon (outlaw), 17th-century Irish rapparee
• Rory O'Hanlon, Irish politician
• Rory O'Hanlon (Irish judge), Irish High Court judge
• Siobhán O'Hanlon, Sinn Féin politician
• Virginia O'Hanlon, catalyst for "Yes, Virginia, there is a Santa Claus"

See also

• All pages with titles containing O'Hanlon
• Hanlon

References

• The O'Hanlons of Orior 1558–1691:Part II, Joseph Canning, Seanchas Ard Mhacha, pp. 111–192, 2002.