| Place | Post Code |
|---|---|
| Madurapakkam, Chengalpattu | 600127 |
| Mahindra World City, Chengalpattu | 603004 |
| Mailai, Chengalpattu | 603108 |
| Mambakkam Rf, Chengalpattu | 603106 |
| Manambathi, Chengalpattu | 603105 |
| Manapakkam, Chengalpattu | 603111, 600125 |
| Mannivakkam, Chengalpattu | 603211, 600048 |
| Maraimalai Nagar, Chengalpattu | 603209 |
| Maruderi, Chengalpattu | 603108 |
| Melaiyur, Chengalpattu | 603108 |
| Melakkottaiyur, Chengalpattu | 600127 |
| Melkanagampattu, Chengalpattu | 603109 |
| Melmanapakkam, Chengalpattu | 603101 |
| Melrosapuram, Chengalpattu | 603204 |
| Moolacheri, Chengalpattu | 600127 |
| Mullipakkam, Chengalpattu | 603105 |
| Murugamangalam, Chengalpattu | 600127 |
| Muttukadu, Chengalpattu | 603112 |
| Nallambakkam, Chengalpattu | 600127 |
| Navalur, Chengalpattu | 600130 |
| Nedungundram, Chengalpattu | 600127 |
| Nellikuppam, Chengalpattu | 603108 |
| Nemmeli Rf, Chengalpattu | 603104 |
| Ninnakarai, Chengalpattu | 603203 |
| Oragadam Rf, Chengalpattu | 603109 |
| Orathur, Chengalpattu | 603105 |