Selaiyur SO is the primary post office registered under PIN code 600073 in Chengalpattu, Tamil Nadu. This code sits within the Southern Postal Region, with 3 offices operating under it.
| Post office | Type | Full name |
|---|---|---|
| Selaiyur SO | SO | Sub Post Office |
| Gowriwakkam SO | SO | Sub Post Office |
| Rajakilpakkam BO | BO | Branch Post Office |
