Cognomen Phongsack (Phongsack 
) , all over the world, is a rare family name. The surname Phongsack is characteristic of Laos, where it is quite a rare surname, Australia, where it is a very rare surname, and France, where it is an extremely rare surname. Much less frequently, Phongsack is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Phongsack | Australia, Canada, United States, Laos, France |