| Post Office | Pin Code |
| Akkaraivattam BO Pin Code | 609604 |
| Ambagarathur SO Pin Code | 609601 |
| Dharmapuram BO Pin Code | 609602 |
| Karaikal Bazaar SO Pin Code | 609602 |
| Karaikal SO Pin Code | 609602 |
| Karaikal South SO Pin Code | 609602 |
| Karaikalmedu BO Pin Code | 609605 |
| Karaikoilpathu BO Pin Code | 609605 |
| Karukkangudi BO Pin Code | 609607 |
| Kottuchery SO Pin Code | 609609 |
| Kurumbagaram BO Pin Code | 609603 |
| Madagadi BO Pin Code | 609602 |
| Melakasakudi BO Pin Code | 609603 |
| Nallambal BO Pin Code | 609601 |
| Nallathur BO Pin Code | 609603 |
| Nedungadu SO Pin Code | 609603 |
| Neravy SO Pin Code | 609604 |
| Seithur BO Pin Code | 609601 |
| Sellur BO Pin Code | 609607 |
| Surakudi BO Pin Code | 609607 |
| Thalatheru SO Pin Code | 609605 |
| Tirumalairayanpattinam SO Pin Code | 609606 |
| Tirunallar SO Pin Code | 609607 |
| Tiruvettakudi BO Pin Code | 609609 |
| TRPattinam South BO Pin Code | 609606 |
| Varichikudi BO Pin Code | 609609 |
| Vizhithiyur BO Pin Code | 609607 |
