Last name Ballagh (Ballagh 
) , across the world, is a rare surname. The last name Ballagh is habitual in Ireland, where it is a rare surname, Australia, and Canada. Not in comparison with a country's population, it is the most numerous in the United States, Australia, and Canada.
| VARIANT | COUNTRY |
|---|---|
| Ballagh | Australia, Canada, Morocco, Ireland, United States |
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james ballagh US (b. 1832) |
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john craig ballagh American missionary, US (b. 1842) |
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| john ballagh JP (b. 1842) |
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| james curtis ballagh American historian, US (b. 1866) |
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robert ballagh Irish artist, IE (b. 1943) |
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lillie stella acer ballagh |
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| robert ballagh Peerage person ID=705647 (b. 1942) |
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| rachel ballagh IE (b. 1968) |
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| susan a. ballagh researcher |
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| aaron ballagh researcher ORCID ID = 0000-0002-8040-7788 |
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| mary ballagh Peerage person ID=292513 |
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| rob ballagh physicist in New Zealand, FRSNZ |
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