| Locality | Postal Code |
|---|---|
| Bijiao, Buxin (埤脚村) | 513001 |
| Buxin, Buxin (埔心村) | 513002, 513004, 513007, 513008 |
| Dahua, Buxin (大華村) | 513003 |
| Dongmen, Buxin (東門村) | 513004, 513006, 513008, 513011 |
| Erzhong, Buxin (二重村) | 513001 |
| Jingkou, Buxin (經口村) | 513005, 513006 |
| Jiuguan, Buxin (舊舘村) | 513002, 513007, 513008 |
| Luocuo, Buxin (羅厝村) | 513000 |
| Nanguan, Buxin (南舘村) | 513003 |
| Pixia, Buxin (埤霞村) | 513001 |
| Qiongjiao, Buxin (芎蕉村) | 513002 |
| Renli, Buxin (仁里村) | 513003 |
| Taiping, Buxin (太平村) | 513003, 513006 |
| Wabei, Buxin (瓦北村) | 513004 |
| Wanan, Buxin (瓦南村) | 513005 |
| Wazhong, Buxin (瓦中村) | 513004, 513005, 513007 |
| Wufeng, Buxin (梧鳳村) | 513001 |
| Xinguan, Buxin (新舘村) | 513003, 513008 |
| Yimin, Buxin (義民村) | 513011 |
| Youche, Buxin (油車村) | 513004, 513011 |