Last name Postlewaite (Postlewaite 
) , worldwide, is a rare family name. The surname Postlewaite is habitual in the United States, where it is a rare surname, Canada, where it is a very rare surname, and the United Kingdom.
| VARIANT | COUNTRY |
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| Postlewaite | Brazil, Canada, United States, United Kingdom |
| joseph w. postlewaite 19th-century composer of music in Missouri, U.S. (b. 1827) |
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| andrew postlewaite economist (University of Pennsylvania) (b. 1943) |
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| amy postlewaite Peerage person ID=253497 |
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