Family name Portwood (Portwood 
) , in the world, is quite a rare surname. The cognomen Portwood is characteristic of the United States, where it is a rare surname, the United Kingdom, and Switzerland. Not in comparison with a country's population, it is commonest in the United States, the United Kingdom, and Australia.
| VARIANT | COUNTRY |
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| Portwood | United Kingdom, Australia, Switzerland, United States, Canada |
| cliff portwood British footballer (1937-2012), GB (b. 1937) |
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amber portwood American reality television personality, US (b. 1990) |
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| nigel portwood British executive, GB (b. 1965) |
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| george portwood British master builder |
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| john l portwood researcher |
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| laura portwood-stacer (b. 1982) |
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