Family name Killoran (Killoran 
) , throughout the world, is quite a rare cognomen. The last name Killoran is habitual in Ireland, where it is quite a rare surname, Canada, where it is a rare surname, and the United Kingdom. Not in comparison with a country's population, it is the most numerous in the United States, the United Kingdom, and Canada.
| VARIANT | COUNTRY |
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| Killoran | Australia, Canada, United Kingdom, United States, Ireland |
| paddy killoran Irish musician, IE (b. 1904) |
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| patrick killoran AU (b. 1922) |
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| theresa mary killoran Peerage person ID=658836 |
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| beth killoran American information technology executive and civil servant, US |
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| amanda killoran doctoral candidate at the London School of Economics and Political Science |
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| michael p killoran researcher |
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| patrick m killoran researcher |
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| john killoran US (b. 1977) |
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| jennifer davisson killoran |
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