In Kollam district, Kerala, PIN code 691541 is anchored by Madathara SO, a Sub Post Office. Mail addressed to this code is sorted through the Southern Postal Region, across 3 listed offices.
| Post office | Type | Full name |
|---|---|---|
| Madathara SO | SO | Sub Post Office |
| Kollayil BO | BO | Branch Post Office |
| Venkolla BO | BO | Branch Post Office |
