Cognomen Seong (Seong 
, ซอง 
, Сеонг 
) , across the world, is a common family name. The surname Seong is characteristic of Malaysia, where it is a common surname, Macao, where it is quite a rare surname, and Taiwan. Measured by absolute frequency, it most frequently occurs in Malaysia, China, and Taiwan. Much less frequently, Seong is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Seong | Taiwan, United States, South Korea, Malaysia, China |
| ซอง | Thailand |
| Сеонг | Kazakhstan, Russia |
| سونغ | Sudan |
| seong of balhae Ruler of Balhae (b. 750) |
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| seong seok-rin (b. 1338) |
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| seong bong-jo (b. 1401) |
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| seong jun (b. 1436) |
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| seong hui-ahn Korean politician (b. 1461) |
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| seong se-chang (b. 1481) |
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| seong un Joseon Confucian scholar and poet (b. 1497) |
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| seong hon Korean Confucianist (1535-1598) (b. 1535) |
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seong moy painter (1921-2013), US (b. 1921) |
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| seong baek-in Korean academic (b. 1933) |
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| paul leong khee seong Malaysian politician, MY (b. 1939) |
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| seong nak-gun South Korean athlete, KR (b. 1962) |
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| seung-yong seong South Korean immunologist and microbiologist, KR (b. 1965) |
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| seong nam kim (b. 1965) |
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| teo kok seong politician (b. 1979) |
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