Post offices and branch post offices present in North Sikkim district of Sikkim state. There are 22 Post Offices located in the district. List of Pin code of all the places in North Sikkim is listed below.
| Post Office | Taluk | District | PIN Code |
|---|---|---|---|
| Chungthang S.O | Chungthang | North Sikkim | 737120 |
| Kabi S.O | Mangan | North Sikkim | 737117 |
| Lachen B.O | Chungthang | North Sikkim | 737120 |
| Lachung B.O | Chungthang | North Sikkim | 737120 |
| Lingdem B.O | Mangan | North Sikkim | 737116 |
| Lingthem B.O | Mangan | North Sikkim | 737116 |
| Lower Dzongu B.O | Mangan | North Sikkim | 737116 |
| Mangan S.O | Mangan | North Sikkim | 737116 |
| Manul B.O | Mangan | North Sikkim | 737116 |
| Men Rong Rong B.O | Mangan | North Sikkim | 737116 |
| Naga B.O | Chungthang | North Sikkim | 737120 |
| Namok B.O | Mangan | North Sikkim | 737116 |
| Phamtam B.O | Mangan | North Sikkim | 737116 |
| Phensong S.O | Mangan | North Sikkim | 737118 |
| Phudong S.O | Mangan | North Sikkim | 737119 |
| Ramthang B.O | Mangan | North Sikkim | 737116 |
| Rangrang B.O | Mangan | North Sikkim | 737116 |
| Sangkalan B.O | Mangan | North Sikkim | 737116 |
| Shipgyare B.O | Chungthang | North Sikkim | 737120 |
| Singhik B.O | Mangan | North Sikkim | 737116 |
| Tingchim B.O | Mangan | North Sikkim | 737116 |
| Tingvong B.O | Mangan | North Sikkim | 737116 |