| Locality | Postal Code |
|---|---|
| Seongsan-Dong, Seong (성산동) | 51554, 51555, 51556, 51557, 51573, … |
| Sinchon-Dong, Seong (신촌동) | 51561, 51562, 51563, 51564, 51565, … |
| Towol-Dong, Seong (토월동) | 51451, 51460 |
| Ungnam-Dong, Seong (웅남동) | 51558, 51559, 51560, 51569, 51570, … |
| Wanam-Dong, Seong (완암동) | 51572, 51577 |
| Wollim-Dong, Seong (월림동) | 51568 |
| Yanggok-Dong, Seong (양곡동) | 51563, 51565, 51566, 51567, 51568, … |