Surname O'Hanlon (O'Hanlon 
) , all over the world, is quite a rare family name. The cognomen O'Hanlon is characteristic of Ireland, where it is quite a common surname, Isle of Man, and Australia, where it is quite a rare surname. Not in comparison with a country's population, the name is most common in Ireland, the United Kingdom, and Australia.
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| O'Hanlon | Australia, New Zealand, United Kingdom, United States, Ireland |
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john o'hanlon Irish cleric and poet (1821-1905), IE (b. 1821) |
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john o'hanlon Irish chess master (1876-1960), GB (b. 1876) |
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| thomas o'hanlon British politician (b. 1837) |
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laura virginia o'hanlon American teacher (1889-1971), US (b. 1889) |
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george o'hanlon American actor (1912-1989), US (b. 1912) |
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| william o'hanlon cricketer (1863-1940), AU (b. 1863) |
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| john o'hanlon Irish politician (b. 1872) |
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| john o'hanlon Irish republican (b. 1889) |
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| michael o'hanlon Irish politician, farmer, journalist and company director (1890-1967), IE (b. 1890) |
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| richard e. o'hanlon artist, US (b. 1906) |
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| ann rice o'hanlon American painter, US (b. 1908) |
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| james o'hanlon screenwriter (b. 1910) |
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michael o'hanlon American defense and foreign policy expert, GB (b. 1961) |
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| mick o'hanlon Irish hurler and Gaelic footballer (b. 1920) |
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| bertie o'hanlon rugby union player (1924-2016), IE (b. 1924) |
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