| Place | Post Code |
|---|---|
| Kollangadu Vetti, Thiruvaiyaru | 613205 |
| Komakudi, Thiruvaiyaru | 613104 |
| Konerirajapuram, Thiruvaiyaru | 613101 |
| Koovattakudi, Thiruvaiyaru | 613602 |
| Koviladi, Thiruvaiyaru | 613105 |
| Koviladi-TPL, Thiruvaiyaru | 613105 |
| Kulimathur, Thiruvaiyaru | 613101 |
| Kuthur, Thiruvaiyaru | 613104 |
| Lourdupuram, Thiruvaiyaru | 613104 |
| Mahadevapuram, Thiruvaiyaru | 613102 |
| Maikkelpatti, Thiruvaiyaru | 613104 |
| Manakkarambai, Thiruvaiyaru | 613205 |
| Manalmedu, Thiruvaiyaru | 614207 |
| Manathidal, Thiruvaiyaru | 613101 |
| Mannarsamudram, Thiruvaiyaru | 613101 |
| Maruvur, Thiruvaiyaru | 613203 |
| Meenackshipuram, Thiruvaiyaru | 613101 |
| Mekalathur, Thiruvaiyaru | 613102 |
| Melapunavasal, Thiruvaiyaru | 613204 |
| Mettukalam, Thiruvaiyaru | 613203 |
| Mohamed Bunder, Thiruvaiyaru | 613201 |
| Moonru Kumili, Thiruvaiyaru | 613105 |
| Mukasakaduveli, Thiruvaiyaru | 613203 |
| Mullakudi, Thiruvaiyaru | 613104 |
| Nadukaveri, Thiruvaiyaru | 613101 |
| Nadupadugai, Thiruvaiyaru | 613104 |