Family name Postans (Postans 
) , in the entire world, is a rare cognomen. The family name Postans is habitual in Australia, where it is a rare surname, the United Kingdom, and Canada, where it is a very rare surname. Measured by absolute frequency, this name is the most popular in the United Kingdom, Australia, and the United States.
| VARIANT | COUNTRY |
|---|---|
| Postans | Canada, United Kingdom, United States, South Africa, Australia |
| thomas postans British Colonial officer (b. 1808) |
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| john postans Olympic sport shooter, GB (b. 1869) |
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| arthur thomas postans British entomologist and hairdresser, GB (b. 1892) |
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| mark postans researcher (ORCID 0000-0002-8803-7259) |
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