Surname 성재 (성재 
, Seongjae 
, Sung-Jae ) , across the world, is a rare cognomen. The family name 성재 is habitual in South Korea, where it is a rare surname, China, where it is an extremely rare surname, and the United States. Much more frequently, 성재 is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| 성재 | South Korea |
| Seongjae | South Korea, United States, China, Germany, Canada |
| Seong-Jae, Sung-Jae | South Korea, United States |