| Kanavou Street | 62125 | Serres | Serres |
| Kapetan Agra Street | 62122 | Serres | Serres |
| Kapetan Mitrousi Street | 62125 | Serres | Serres |
| Kapodistria Ioanni Street | 62121 | Serres | Serres |
| Karaiskaki Georgiou Street | 62121 | Serres | Serres |
| Karaoli Michalaki Street | 62123 | Serres | Serres |
| Karatasou Tasou Street | 62125 | Serres | Serres |
| Karkavitsa Andrea Street | 62122 | Serres | Serres |
| Karyotaki Kosta Street | 62122 | Serres | Serres |
| Kasomouli Nikolaou Street | 62123 | Serres | Serres |
| Kastellorizou Street | 62124 | Serres | Serres |
| Kathigiti Christomanou Anastasiou Street | 62121 | Serres | Serres |
| Kathigiti Ioakeimidi Savva Street | 62122 | Serres | Serres |
| Katsimidi A. Street | 62122 | Serres | Serres |
| Kavafi Konstantinou Street | 62123 | Serres | Serres |
| Keas Street | 62125 | Serres | Serres |
| Kechagia Panagioti Street | 62122 | Serres | Serres |
| Kefallinias Street | 62125 | Serres | Serres |
| Kerasountos Street | 62123 | Serres | Serres |
| Kerkyras Street | 62123 | Serres | Serres |
| Kilkis Street | 62125 | Serres | Serres |
| Kiou Street | 62124 | Serres | Serres |
| Kiousi Lazarou Street | 62122 | Serres | Serres |
| Kioutacheias Street | 62125 | Serres | Serres |
| Kissavou Street | 62125 | Serres | Serres |
| Kithaironos Street | 62125 | Serres | Serres |
| Kolokotroni Theodorou Street | 62125 | Serres | Serres |
| Komninon Street | 62123, 62125 | Serres | Serres |
| Komninou Alexiou Street | 62123 | Serres | Serres |
| Komninou Theodorou Angelou Street | 62122 | Serres | Serres |
| Konstantinoupoleos Street | 62122 | Serres | Serres |
| Konstantopoulou Arist. Street | 62500 | Serres | Serres |
| Kontodimou Kosta Street | 62124 | Serres | Serres |
| Korai Adamantiou Street | 62121 | Serres | Serres |
| Korinthou Street | 62122 | Serres | Serres |
| Kosti Street | 62125 | Serres | Serres |
| Kostopoulou Peristeri Street | 62123 | Serres | Serres |
| Koula Naki Street | 62121 | Serres | Serres |
| Kountouriotou Street | 62122 | Serres | Serres |
| Koureos Stergiou Street | 62122 | Serres | Serres |