Kunnathur is Taluka (Tehsil) in Kollam district of Kerala state. Kunnathur has 22 areas (postal offices).
| Pin code | Area | District | Taluka | Postal Status |
|---|---|---|---|---|
| 690520 | Ambalathumbhagom PIN Code | Kollam | Kunnathur | Branch Office |
| 690561 | Anayadi PIN Code | Kollam | Kunnathur | Branch Office |
| 690520 | Chathakulam PIN Code | Kollam | Kunnathur | Branch Office |
| 691552 | Edakkad PIN Code | Kollam | Kunnathur | Branch Office |
| 690522 | Kakkakunnu PIN Code | Kollam | Kunnathur | Branch Office |
| 690521 | Karali Jn PIN Code | Kollam | Kunnathur | Branch Office |
| 690540 | Karimthottuva PIN Code | Kollam | Kunnathur | Branch Office |
| 690540 | Kunnathur East PIN Code | Kollam | Kunnathur | Sub Office |
| 691553 | Manampuzha PIN Code | Kollam | Kunnathur | Branch Office |
| 690520 | Muthupilakkad PIN Code | Kollam | Kunnathur | Branch Office |
| 690519 | Mynagappally North PIN Code | Kollam | Kunnathur | Branch Office |
| 690521 | Pallisserickal PIN Code | Kollam | Kunnathur | Branch Office |
| 690561 | Parakadavu PIN Code | Kollam | Kunnathur | Branch Office |
| 690522 | Patharam PIN Code | Kollam | Kunnathur | Branch Office |
| 690520 | Poruvazhy PIN Code | Kollam | Kunnathur | Sub Office |
| 691553 | Puthenambalam PIN Code | Kollam | Kunnathur | Branch Office |
| 690521 | Sasthamcottah PIN Code | Kollam | Kunnathur | Sub Office |
| 690522 | Sooranad PIN Code | Kollam | Kunnathur | Sub Office |
| 690561 | Sooranad North PIN Code | Kollam | Kunnathur | Sub Office |
| 690540 | Thuruthikara PIN Code | Kollam | Kunnathur | Branch Office |
| 690521 | Venga PIN Code | Kollam | Kunnathur | Branch Office |
| 690521 | Vilanthara Jn PIN Code | Kollam | Kunnathur | Branch Office |