Last name Khamphoui (Khamphoui 
) , worldwide, is quite a rare surname. The family name Khamphoui is habitual in Laos, where it is quite a common surname, France, where it is an extremely rare surname, and the United States. Much less frequently, Khamphoui is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Khamphoui | Laos, France, United States |
|
khamphoui sisavatdy Prime Minister of Royal Lao Government in Exile (2003-present) |
|
| khamphoui keoboualapha Laotian politician and member of the Lao People's Revolutionary Party (b. 1948) |
|