Surname Cahalan (Cahalan 
) , around the globe, is quite a rare family name. The last name Cahalan is characteristic of Ireland, where it is quite a rare surname, Australia, where it is a rare surname, and the United States.
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| Cahalan | United Kingdom, Australia, Ireland, United States, Canada |
| cissie cahalan Irish trade unionist, feminist, and suffragette, IE (b. 1876) |
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| arthur b. cahalan American politician, US (b. 1883) |
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susannah cahalan American journalist and writer, US (b. 1985) |
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| robert cahalan researcher (b. 1946) |
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| adrienne cahalan Australian sailor, AU (b. 1964) |
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| kathleen a. cahalan Academic |
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| michael d cahalan researcher |
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| joe cahalan college basketball player (1961–1961) Iowa |
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| stephen d cahalan researcher |
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| francis cahalan Peerage person ID=309205 |
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| ryan cahalan researcher |
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| roisin cahalan researcher |
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| sinéad cahalan Camogie player, IE |
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| cahalan ó corcrán Irish abbot |
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| joe cahalan college basketball player (1963–1963) Drake |
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