According to South Korea’s National Statistical Office, these are the most popular Korean surnames in the Republic of Korea.
1. 김 (金; Kim, Gim)
2. 이 (李; Lee, Yi, I, Yee)
3. 박 (朴; Park, Pak, Bak)
4. 최 (崔; Choi, Choe)
5. 정 (鄭; Jeong, Chung)
6. 강 (姜; Kang, Gang)
7. 조 (曹; Cho, Jo, Joe)
8. 윤 (尹; Yoon, Youn, Yun)
9. 장 (張; Jang, Chang)
10. 신 (申; Shin, Sin)
11. 한 (韓; Han, Hahn)
12. 서 (徐; Seo,Suh)
13. 권 (權; Kwon)
14. 손 (孫; Son, Sohn)
15. 황 (黃; Hwang, Whang)
16. 송 (宋; Song,Soung)
17. 안 (安; Ahn, An)
18. 임 (林; Lim, Rim, Im)
19. 유 (柳; Yoo, Yu)
20. 홍 (洪; Hong)
In parentheses are the Chinese hanja characters and the possible English transliterations.