Last name O'Hare (O'Hare 
) , all around the world, is quite a common cognomen. The cognomen O'Hare is habitual in 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, it is commonest in the United Kingdom, the United States, and Ireland.
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| O'Hare | Canada, Australia, United States, United Kingdom, Ireland |
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j. frank o'hare politician in Massachusetts, US, US (b. 1874) |
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kate richards o'hare American activist (1876-1948), US (b. 1876) |
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| patrick o'hare British politician (b. 1849) |
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edward o'hare United States Navy Medal of Honor recipient, US (b. 1914) |
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| william christopher o'hare American composer, orchestra leader, arranger, and music teacher, US (b. 1867) |
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| william f. o'hare Catholic bishop (1870-1926), US (b. 1870) |
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| william h. o'hare American lawyer and politician, US (b. 1878) |
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| john o'hare American union organizer, US (b. 1881) |
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| frank p. o'hare (b. 1877) |
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| husk o'hare American musician and bandleader, US (b. 1890) |
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| edward j. o'hare American lawyer, US (b. 1893) |
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| john o'hare Scottish footballer (b. 1905) |
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denis o'hare American actor, US (b. 1962) |
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john o'hare Australian actor, AU (b. 1962) |
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kevin o'hare British ballet dancer, GB (b. 1965) |
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