Family name อุง (Ung 
, อุง 
) , in the entire world, is a common surname. The family name อุง is habitual in Macao, where it is a common surname, Malaysia, where it is quite a common surname, and Brunei, where it is quite a rare surname. Measured by absolute frequency, it is commonest in Malaysia, the United States, and Myanmar. Very seldom, อุง is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ung | China, Myanmar, France, United States, Malaysia |
| อุง | Thailand |