| Place | Post Code |
|---|---|
| Komasamudram, Ulundurpettai | 605751 |
| Kondasamudram, Ulundurpettai | 607209 |
| Koo-kallakurichi, Ulundurpettai | 606115 |
| Koo. Thangal, Ulundurpettai | 607201 |
| Kookangadu, Ulundurpettai | 606102 |
| Koondalur, Ulundurpettai | 606305 |
| Kooranur, Ulundurpettai | 607203 |
| Koothanur, Ulundurpettai | 607201 |
| Korattur, Ulundurpettai | 606102 |
| Kottaiyampalayam, Ulundurpettai | 606102 |
| Krishnareddipalayam, Ulundurpettai | 607204 |
| Ku. Kallakurichi, Ulundurpettai | 606115 |
| Kuchipalayam, Ulundurpettai | 606102, 607204 |
| Kunamangalam, Ulundurpettai | 606107 |
| Kunjaram, Ulundurpettai | 607201 |
| Kunjaram Colony, Ulundurpettai | 607201 |
| Kuthanur, Ulundurpettai | 607209 |
| Kuttadi, Ulundurpettai | 606115 |
| Kuvadu, Ulundurpettai | 607201 |
| Kuvagam, Ulundurpettai | 606102 |
| Kuyilapalayam, Ulundurpettai | 607204 |
| Ma-kunnathur, Ulundurpettai | 606102 |
| Madampattu, Ulundurpettai | 607204 |
| Madapattu, Ulundurpettai | 607204 |
| Madiyanur, Ulundurpettai | 606107 |
| Mailankuppam, Ulundurpettai | 607204 |