Post offices and branch post offices present in South Sikkim district of Sikkim state. There are 45 Post Offices located in the district. List of Pin code of all the places in South Sikkim is listed below.
| Post Office | Taluk | District | PIN Code |
|---|---|---|---|
| Assangthang B.O | Namchi | South Sikkim | 737126 |
| Barfung B.O | Ravangla | South Sikkim | 737139 |
| Ben B.O | Ravangla | South Sikkim | 737139 |
| Berang B.O | Ravangla | South Sikkim | 737139 |
| Damthang B.O | Namchi | South Sikkim | 737126 |
| Kerabari B.O | Melli | South Sikkim | 737128 |
| Kewzing B.O | Ravangla | South Sikkim | 737139 |
| Kitam B.O | Namchi | South Sikkim | 737126 |
| Kupup B.O | Namchi | South Sikkim | 737102 |
| Lungchuk B.O | Melli | South Sikkim | 737128 |
| Maniram B.O | Namchi | South Sikkim | 737126 |
| Manpur B.O | Melli | South Sikkim | 737128 |
| Melli Bazar S.O | Melli | South Sikkim | 737128 |
| Melli Dara B.O | Melli | South Sikkim | 737128 |
| Mic Khola B.O | Namchi | South Sikkim | 737126 |
| Namchi S.O | Namchi | South Sikkim | 737126 |
| Nandugaon B.O | Namchi | South Sikkim | 737126 |
| Okharey B.O | Jorethang | South Sikkim | 737121 |
| Pabong B.O | Namchi | South Sikkim | 737126 |
| Payiong B.O | Melli | South Sikkim | 737128 |
| Perbing B.O | Namchi | South Sikkim | 737126 |
| Phalidara B.O | Namchi | South Sikkim | 737126 |
| Phamtam B.O | Ravangla | South Sikkim | 737139 |
| Pipalay B.O | Jorethang | South Sikkim | 737121 |
| Poklok B.O | Namchi | South Sikkim | 737126 |
| Ralang B.O | Ravangla | South Sikkim | 737139 |
| Rateypani B.O | Melli | South Sikkim | 737128 |
| Ravangla S.O | Ravangla | South Sikkim | 737139 |
| Reshi B.O | Jorethang | South Sikkim | 737121 |
| Ribdi-bhareng B.O | Jorethang | South Sikkim | 737121 |
| Rong B.O | Namchi | South Sikkim | 737126 |
| Sadam B.O | Melli | South Sikkim | 737128 |
| Sanchabarey Daramdim B.O | Jorethang | South Sikkim | 737121 |
| Sanganath B.O | Jorethang | South Sikkim | 737121 |
| Sangmoo B.O | Ravangla | South Sikkim | 737139 |
| Shalghari B.O | Namchi | South Sikkim | 737126 |
| Singhithang B.O | Namchi | South Sikkim | 737126 |
| Sombaria B.O | Jorethang | South Sikkim | 737121 |
| Soreng B.O | Jorethang | South Sikkim | 737121 |
| Sorok B.O | Namchi | South Sikkim | 737126 |
| Sumbuk B.O | Melli | South Sikkim | 737128 |
| Tingmoo B.O | Ravangla | South Sikkim | 737139 |
| Tinkitam B.O | Ravangla | South Sikkim | 737139 |
| Turuk B.O | Melli | South Sikkim | 737128 |
| Wok B.O | Namchi | South Sikkim | 737126 |