| Kerala PIN Codes – Start With O letter |
| Kerala Postal Codes PIN Codes List of Pin codes of Kerala towns and villages |
| A | B | C | D | E | U | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W |
| Othayammadam B.O | 670301 |
| Olayambadi B.O | 670306 |
| Ottathai B.O | 670571 |
| Ozhinha Valappu B.O | 671314 |
| Olavanna | 673025 |
| Onchiyam B.O | 673308 |
| Olavilam | 673313 |
| Orkatteri | 673501 |
| Omasseri B.O | 673572 |
| Oravil B.O | 673614 |
| Olavattur B.O | 673638 |
| Omanur B.O | 673640 |
| Olukkur B.O | 673642 |
| Olamathi B.O | 673642 |
| Olalakkara B.O | 676306 |
| Ozhur | 676313 |
| Omachapuzha B.O | 676320 |
| Oorakam Keezhmuri Edso | 676515 |
| Oorakam Melmuri B.O | 676519 |
| Othukungal | 676528 |
| Olavakot | 678002 |
| Olasseri B.O | 678551 |
| Olalapadi B.O | 678557 |
| Olive Mount B.O | 678702 |
| Olinkadavu B.O | 678706 |
| Ottapalam | 679101 |
| Otalur B.O | 679534 |
| Othalur West B.O | 679591 |
| Ollur | 680306 |
| Orumanayur | 680512 |
| Ollur Thaikkattusseri | 680655 |
| Ollukara | 680655 |
| Ochanathuruthu | 682508 |
| Okkal | 683550 |
| Ottalloor B.O | 685586 |
| Olassa | 686014 |
| Onamthuruthu B.O | 686602 |
| Ozhavur | 686634 |
| Ozhavur East B.O | 686634 |
| Onakkoor B.O | 686667 |
| Oliyapuram Edso | 686679 |
| Oonnukal B.O | 686693 |
| Ooramana | 686730 |
| Olavaipu B.O | 688526 |
| Othara | 689546 |
| Othara West | 689551 |
| Oonukal Quilon B.O | 689647 |
| Omallur Kla | 689647 |
| Oonakkavu B.O | 689674 |
| Ottupura B.O | 689691 |
| Olattiambalam | 690510 |
| Ochira | 690526 |
| Ottakal B.O | 691308 |
| Oyur | 691510 |
| Odanavattom | 691512 |
| Ozhukuparackal B.O | 691533 |
| Oolampara B.O | 695005 |
| Ookode B.O | 695020 |
| Oorupoika B.O | 695104 |
| Ottasekhara Mangalam | 695125 |
| Olathanni B.O | 695133 |
| Ooruttambalam | 695507 |