| Konstantinidi Georgiou Street | 10445 | Athens | Attica |
| Konstantinidou Olgas Street | 11363 | Athens | Attica |
| Konstantinoupoleos Avenue | 10435, 10436, 10441, 10443, 10444, 10445, 10447, 11854, 11855 | Athens | Attica |
| Kontogiannaion Street | 11475 | Athens | Attica |
| Kontogiannaki Ioanni Street | 11526 | Athens | Attica |
| Kontoglou Foti Street | 10443 | Athens | Attica |
| Kontogoni Konstantinou Street | 11474 | Athens | Attica |
| Kontoskaliou Street | 11363 | Athens | Attica |
| Kontou Konstantinou Street | 11141, 11255 | Athens | Attica |
| Korai Adamantiou Street | 10564 | Athens | Attica |
| Koraka Michail Street | 10445 | Athens | Attica |
| Korgialeniou Marinou Street | 11526 | Athens | Attica |
| Korinis Street | 10553 | Athens | Attica |
| Korinthias Street | 11526, 11527 | Athens | Attica |
| Korinthou Street | 10441 | Athens | Attica |
| Korizi Alexandrou Street | 11743 | Athens | Attica |
| Korma Ilia Street | 11523 | Athens | Attica |
| Kornarou Vitsentzou Street | 10563 | Athens | Attica |
| Koroivou Street | 11635 | Athens | Attica |
| Koroneias Street | 11142 | Athens | Attica |
| Koroneias Street | 11522 | Athens | Attica |
| Koronis Street | 11471 | Athens | Attica |
| Koropiou Street | 11527 | Athens | Attica |
| Korthiou Street | 11254 | Athens | Attica |
| Korydalleos Street | 11252 | Athens | Attica |
| Korytsas Street | 10447 | Athens | Attica |
| Kosma Aitolou Street | 11471 | Athens | Attica |
| Kosma Kitsou & Panou Street | 11744 | Athens | Attica |
| Kosma Melodou Street | 11471 | Athens | Attica |
| Kossou Ioanni Street | 11144 | Athens | Attica |
| Kosti Nikolaou Street | 10444 | Athens | Attica |
| Kotopouli Marikas Street | 10431, 10432 | Athens | Attica |
| Kotsika Street | 10434 | Athens | Attica |
| Kotta Konstantinou Street | 11525 | Athens | Attica |
| Kotyaiou Street | 11521 | Athens | Attica |
| Kotylaiou Street | 11364 | Athens | Attica |
| Kougkiou Byway | 11476 | Athens | Attica |
| Kougkiou Street | 11476 | Athens | Attica |
| Koukoulari Street | 11143 | Athens | Attica |
| Kouma Konstantinou Street | 11471 | Athens | Attica |