Brunei is divided into districts, which are subdivided into mukims. The mukims are further subdivided into kampong (villages). Here is a
list of the mukims in each district, with the first two letters of the postal code for each mukim.
| Name | HASC | Post |
| Amo | BN.TE.AM | PD |
| Bandar Seri Begawan | BN.BM.BB | BS |
| Bangar | BN.TE.BN | PA |
| Batu Apoi | BN.TE.BA | PC |
| Berakas | BN.BM.BE | BB, BC |
| Bokok | BN.TE.BO | PE |
| Bukit Sawat | BN.BE.BS | KF |
| Burong Pinggai Ayer | BN.BM.BP | BM |
| Gadong | BN.BM.GA | BE |
| Keriam | BN.TU.KE | TB |
| Kianggeh | BN.BM.KG | BA |
| Kilanas | BN.BM.KL | BF |
| Kiudang | BN.TU.KI | TE |
| Kota Batu | BN.BM.KB | BD |
| Kuala Balai | BN.BE.BA | KD |
| Kuala Belait | BN.BE.BT | KA |
| Labi | BN.BE.LA | KE |
| Labu | BN.TE.LA | PB |
| Lamunin | BN.TU.LA | TG |
| Liang | BN.BE.LI | KC |
| Lumapas | BN.BM.LU | BJ |
| Melilas | BN.BE.ME | KH |
| Mentiri | BN.BM.ME | BU |
| Pekan Tutong | BN.TU.PT | TA |
| Pengkalan Batu | BN.BM.PB | BH |
| Peramu | BN.BM.PE | BP |
| Rambai | BN.TU.RA | TH |
| Saba | BN.BM.SA | BR |
| Sengkurong | BN.BM.SN | BG |
| Serasa | BN.BM.SR | BT |
| Seria | BN.BE.SE | KB |
| Sukang | BN.BE.SU | KG |
| Sungai Kebun | BN.BM.KE | BK |
| Sungai Kedayan | BN.BM.KD | BN |
| Tamoi | BN.BM.TA | BL |
| Tanjong Maya | BN.TU.TM | TD |
| Telisai | BN.TU.TE | TC |
| Ukong | BN.TU.UK | TF |
|