Surname ສມພງ (ສມພງ 
) , in the entire world, is a very rare family name. The family name ສມພງ is habitual in South-eastern Asia, particularly Laos, where it is a rare surname. Much more prevalently, ສມພງ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| ສມພງ | Laos |