Cognomen Clappison (Clappison 
) , throughout the world, is a rare last name. The family name Clappison is characteristic of the United Kingdom, where it is a rare surname, Canada, and New Zealand. Measured by absolute frequency, it is the most numerous in the United Kingdom, Canada, and the United States.
| VARIANT | COUNTRY |
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| Clappison | Australia, Canada, New Zealand, United Kingdom, United States |
| henry gordon clappison Canadian flying ace, CA (b. 1898) |
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| john clappison British artist (b. 1937) |
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| james clappison British politician (born 1956), GB (b. 1956) |
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| emma clappison researcher (ORCID 0000-0003-1372-9995) |
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