Cognomen Phoumin (Phoumin 
) , worldwide, is a rare last name. The cognomen Phoumin is habitual in Laos, where it is quite a rare surname, Cambodia, where it is a very rare surname, and Australia. In absolute terms, it is the most numerous in Laos, the United States, and Cambodia. Very seldom, Phoumin is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Phoumin | Laos, Australia, Cambodia, Thailand, United States |