| Postal/ZIP Codes in Byeokjin-myeon, Seongju (벽진면) |
40000, 40001, 40002, 40003, 40004, … |
| Postal/ZIP Codes in Chojeon-myeon, Seongju (초전면) |
40006, 40007, 40008, 40009, 40010, … |
| Postal/ZIP Codes in Daega-myeon, Seongju (대가면) |
40004, 40034, 40054, 40055, 40056, … |
| Postal/ZIP Codes in Gacheon-myeon, Seongju (가천면) |
40060, 40061, 40062 |
| Postal/ZIP Codes in Geumsu-myeon, Seongju (금수면) |
40058, 40059, 40060 |
| Postal/ZIP Codes in Seongju-eup, Seongju (성주읍) |
40017, 40018, 40020, 40021, 40022, … |
| Postal/ZIP Codes in Seonnam-myeon, Seongju (선남면) |
40032, 40040, 40041, 40042, 40043, … |
| Postal/ZIP Codes in Suryun-myeon, Seongju (수륜면) |
40063, 40064, 40065, 40066 |
| Postal/ZIP Codes in Wolhang-myeon, Seongju (월항면) |
40031, 40035, 40036, 40037, 40038, … |
| Postal/ZIP Codes in Yongam-myeon, Seongju (용암면) |
40049, 40050, 40051, 40052, 40053 |