| Post Office | Pin Code |
| Ahoo Busty BO Pin Code | 737135 |
| Amba BO Pin Code | 737133 |
| Aritar BO Pin Code | 737133 |
| Assam Lingzey BO Pin Code | 737135 |
| Bardang BO Pin Code | 737134 |
| Bering BO Pin Code | 737106 |
| Bermiok BO Pin Code | 737113 |
| Bermiok BO Pin Code | 737134 |
| Beyong BO Pin Code | 737134 |
| Bhusuk BO Pin Code | 737103 |
| Bojoghari BO Pin Code | 737103 |
| Changayshanti BO Pin Code | 737106 |
| Chongey BO Pin Code | 737103 |
| Chujachen BO Pin Code | 737131 |
| Dalapchand BO Pin Code | 737131 |
| Deorali SO Pin Code | 737102 |
| Dhajey BO Pin Code | 737102 |
| Dikchu SO Pin Code | 737107 |
| Dipudara Nhpc Complex BO Pin Code | 737134 |
| Duga BO Pin Code | 737132 |
| East Pendam BO Pin Code | 737132 |
| Gangkha Busty BO Pin Code | 737134 |
| Gangtok Bazar SO Pin Code | 737101 |
| Gangtok HO Pin Code | 737101 |
| Gnathang BO Pin Code | 737102 |
| Gor BO Pin Code | 737107 |
| Karthok BO Pin Code | 737106 |
| Kateng Bokrang BO Pin Code | 737132 |
| Khamdong BO Pin Code | 737134 |
| Kokalay BO Pin Code | 737134 |
| Kyanglasha BO Pin Code | 737102 |
| Latuk BO Pin Code | 737131 |
| Lingdok BO Pin Code | 737103 |
| Lingdum BO Pin Code | 737102 |
| Lingee BO Pin Code | 737134 |
| Lingmoo BO Pin Code | 737134 |
| Lingtam BO Pin Code | 737131 |
| Lingzey BO Pin Code | 737134 |
| Linkey BO Pin Code | 737106 |
| Luing BO Pin Code | 737103 |
| Lumlingthyang BO Pin Code | 737107 |
| Lunsing BO Pin Code | 737134 |
| Majitar SO Pin Code | 737136 |
| Makha SO Pin Code | 737138 |
| Mamring BO Pin Code | 737132 |
| Maney Dara BO Pin Code | 737132 |
| Middle Camp BO Pin Code | 737135 |
| Namcheybong BO Pin Code | 737106 |
| Namphing BO Pin Code | 737134 |
| Namthang BO Pin Code | 737132 |
| Nandok BO Pin Code | 737135 |
| Nazitam BO Pin Code | 737134 |
| Neya BO Pin Code | 737134 |
| North Regu BO Pin Code | 737131 |
| Pabyiok BO Pin Code | 737102 |
| Pacheykhani BO Pin Code | 737106 |
| Pakyong SO Pin Code | 737106 |
| Parkha BO Pin Code | 737131 |
| Penlong BO Pin Code | 737103 |
| Phadamchen BO Pin Code | 737131 |
| Rajbhawan SO (East Sikkim) Pin Code | 737103 |
| Rakdong BO Pin Code | 737107 |
| Raley Khesey BO Pin Code | 737107 |
| Rangli Bazar SO Pin Code | 737131 |
| Rangpo SO Pin Code | 737132 |
| Ranipool SO Pin Code | 737135 |
| Rautey-rumtek BO Pin Code | 737135 |
| Ray-mindu BO Pin Code | 737135 |
| Rhenock SO Pin Code | 737133 |
| Rolep BO Pin Code | 737131 |
| Rorathang BO Pin Code | 737133 |
| Rumtek BO Pin Code | 737135 |
| Sakhu Busty BO Pin Code | 737134 |
| Samdong BO Pin Code | 737107 |
| Samdur BO Pin Code | 737102 |
| Samlick-marchak BO Pin Code | 737135 |
| Sangkhola BO Pin Code | 737134 |
| Sherathang BO Pin Code | 737102 |
| Shivalaya Mandir Lingsey BO Pin Code | 737133 |
| Sichey Gaon SO Pin Code | 737101 |
| Sinchuthang BO Pin Code | 737134 |
| Singtam SO Pin Code | 737134 |
| SMU(Sikkim Manipal University) Pin Code | 737102 |
| Song BO Pin Code | 737134 |
| South Regu BO Pin Code | 737131 |
| Sudunglakha BO Pin Code | 737133 |
| Sumin BO Pin Code | 737134 |
| Tadong SO Pin Code | 737102 |
| Tarku BO Pin Code | 737134 |
| Tashiling SO Pin Code | 737103 |
| Taza BO Pin Code | 737133 |
| Temi Tarku BO Pin Code | 737134 |
| Tshalamthang BO Pin Code | 737106 |
| Tumin BO Pin Code | 737134 |
| Turung BO Pin Code | 737132 |
| Upper Dalapchand BO Pin Code | 737133 |
| Upper Khamdong BO Pin Code | 737133 |
| Upper Martam BO Pin Code | 737135 |
| Upper Pendam BO Pin Code | 737132 |
| West Pendam BO Pin Code | 737134 |
| Yangyang BO Pin Code | 737134 |
