| Locality | Post Code |
|---|---|
| Chidong, Xiyu (池東村) | 881001, 881002 |
| Chima, Xiyu (赤馬村) | 881000 |
| Chixi, Xiyu (池西村) | 881001, 881002, 881002 |
| Dachi, Xiyu (大池村) | 881000 |
| Erkan, Xiyu (二崁村) | 881001 |
| Hejie, Xiyu (合界村) | 881001 |
| Hengjiao, Xiyu (橫礁村) | 881000 |
| Neian, Xiyu (內垵村) | 881002 |
| Waian, Xiyu (外垵村) | 881035 |
| Xiaomen, Xiyu (小門村) | 881001 |
| Zhuwan, Xiyu (竹灣村) | 881000 |
| Penghu Postal Codes | |
|---|---|
| Xiyu (西嶼鄉) | Wangan (望安鄉) |
| Qimei (七美鄉) | Magong (馬公市) |
| Huxi (湖西鄉) | Baisha (白沙鄉) |