| Place | Post Code |
|---|---|
| Porunthavakkam, Chengalpattu | 603003, 603108 |
| Pudupakkam, Chengalpattu | 603103 |
| Pulipakkam, Chengalpattu | 603002 |
| Puthur, Chengalpattu | 603301 |
| Rajakulipettai, Chengalpattu | 603002 |
| Ram Nagar, Chengalpattu | 600091 |
| Ramapuram, Chengalpattu | 603201, 600089 |
| Rayamangalam, Chengalpattu | 603105 |
| Reddikuppam, Chengalpattu | 603108 |
| Reddipalayam, Chengalpattu | 603101 |
| Royalpattu, Chengalpattu | 603108 |
| Salavankuppam, Chengalpattu | 603104 |
| Santhanampattu, Chengalpattu | 603105 |
| Sasthirambakkam, Chengalpattu | 603204 |
| Sathankuppam, Chengalpattu | 603108 |
| Sembakkam, Chengalpattu | 603108 |
| Semencheri, Chengalpattu | 603112 |
| Sengadu, Chengalpattu | 603110 |
| Sengundram, Chengalpattu | 603204 |
| Senneri, Chengalpattu | 603108 |
| Senthamangalam, Chengalpattu | 603204 |
| Singaperumalkoil, Chengalpattu | 603204 |
| Sirudavur, Chengalpattu | 603105 |
| Sirukundram Rf, Chengalpattu | 603108 |
| Sirunkundram, Chengalpattu | 603108 |
| Siruseri, Chengalpattu | 600130 |