Cognomen Sungchang (Sungchang 
) , globally, is a very rare last name. The last name Sungchang is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname. More prevalently, Sungchang is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sungchang | South Korea, Thailand, United States |