| Karaiskaki Georgiou Street (intersects with Oropou Street) | 19015 | Rest of Attica | Attica |
| Karaiskaki Street | 19014 | Rest of Attica | Attica |
| Karakitsou Ch. Street | 19014 | Rest of Attica | Attica |
| Karakitsou G. Street | 19014 | Rest of Attica | Attica |
| Karakoulia Street | 19500 | Rest of Attica | Attica |
| Karamanou Street | 19500 | Rest of Attica | Attica |
| Karamolegkou Street | 19500 | Rest of Attica | Attica |
| Karantanou Street | 19014 | Rest of Attica | Attica |
| Karaoli Michalaki Street | 19600 | Rest of Attica | Attica |
| Karaoli Michalaki Street | 19200 | Rest of Attica | Attica |
| Karatasou Tasou Street | 13343 | Rest of Attica | Attica |
| Karatza Panagioti Street | 13343 | Rest of Attica | Attica |
| Karavia Vas. Street | 13343 | Rest of Attica | Attica |
| Karavostamou Street | 19300 | Rest of Attica | Attica |
| Kardamylion Street | 19015 | Rest of Attica | Attica |
| Karditsas Street | 19006 | Rest of Attica | Attica |
| Karezi Tzenis Street | 13342 | Rest of Attica | Attica |
| Karitsas Street | 19014 | Rest of Attica | Attica |
| Karkavitsa Andrea Street | 13342 | Rest of Attica | Attica |
| Karnas Street | 13343 | Rest of Attica | Attica |
| Karpathou Street | 19014 | Rest of Attica | Attica |
| Karpenisioti Athanasiou Street | 13343 | Rest of Attica | Attica |
| Karpenisiou Street | 19015 | Rest of Attica | Attica |
| Karpenisiou Street | 19006 | Rest of Attica | Attica |
| Karpenisiou Street | 19500 | Rest of Attica | Attica |
| Karpenisiou Street | 13342 | Rest of Attica | Attica |
| Karra I. Street | 19008 | Rest of Attica | Attica |
| Karyas Street | 13341 | Rest of Attica | Attica |
| Karyatidon Street | 19001 | Rest of Attica | Attica |
| Karydias Street | 13343 | Rest of Attica | Attica |
| Karyotaki Kosta Street | 13342 | Rest of Attica | Attica |
| Karyotaki Kosta Street | 19300 | Rest of Attica | Attica |
| Karystou Street | 13341 | Rest of Attica | Attica |
| Kasomouli Nikolaou Street | 13343 | Rest of Attica | Attica |
| Kasomouli Nikolaou Street | 13461 | Rest of Attica | Attica |
| Kasou Street | 13341 | Rest of Attica | Attica |
| Kassandras Street | 19014 | Rest of Attica | Attica |
| Kassandras Street | 13343 | Rest of Attica | Attica |
| Kassianis Street | 13342 | Rest of Attica | Attica |
| Kastani-Liantrou G. Street | 19100 | Rest of Attica | Attica |