Across the world, 성재 (성재 
, Seongjae 
, Sung-Jae ) is quite a rare masculine forename. The first name 성재 is characteristic of Eastern Asia, particularly South Korea, where it is quite a rare masculine name. Very seldom, 성재 is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| 성재 | South Korea |
| Seongjae | Germany, South Korea, Canada, United States, China |
| Seong-Jae, Sung-Jae | South Korea, United States |
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이성재 South Korean actor, KR (b. 1970) |
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최성재 South Korean actor, KR (b. 1984) |
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배성재 KR (b. 1978) |
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| 강성재 South Korean politician, KR (b. 1939) |
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육성재 South Korean singer and actor, KR (b. 1995) |
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| 김성재 South Korean singer, rapper and dancer, KR (b. 1972) |
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| 박성재 KR (b. 1963) |
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| 이성재 South Korean Go player, KR (b. 1977) |
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| 허성재 South Korean voice actor, KR |
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| 장성재 South Korean singer, KR (b. 1984) |
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| 이성재 South Korean footballer, *1987, KR (b. 1987) |
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| 이성재 South Korean pro gamer, KR (b. 1989) |
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| 황성재 KR |
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| 김성재 South Korean baseball player (1993-), KR (b. 1993) |
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| 임성재 golfer, KR (b. 1998) |
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