| Korytsas Street | 13461 | Rest of Attica | Attica |
| Korytsas Street | 19600 | Rest of Attica | Attica |
| Kosma Aitolou Street | 13343 | Rest of Attica | Attica |
| Kosmou Leonida Street | 19011 | Rest of Attica | Attica |
| Kotidou Vas. Street | 19015 | Rest of Attica | Attica |
| Kotopouli Marikas Street | 13342 | Rest of Attica | Attica |
| Koufonision Street | 13341 | Rest of Attica | Attica |
| Kougioumtzoglou Street | 19200 | Rest of Attica | Attica |
| Kougkiou Street | 13461 | Rest of Attica | Attica |
| Kougkiou Street | 13343 | Rest of Attica | Attica |
| Koukouli Ioan. Street | 19100 | Rest of Attica | Attica |
| Koukounarias Street | 13343 | Rest of Attica | Attica |
| Koukoura Marias Street | 19015 | Rest of Attica | Attica |
| Koukouzeli Ioanni Street | 13342 | Rest of Attica | Attica |
| Kouloufakou Street | 19011 | Rest of Attica | Attica |
| Kouma Konstantinou Street | 13343 | Rest of Attica | Attica |
| Koumarianou Street | 19006 | Rest of Attica | Attica |
| Koumarias Street | 13343 | Rest of Attica | Attica |
| Koun Karolou Street | 13342 | Rest of Attica | Attica |
| Koundourou Manousou Street | 13343 | Rest of Attica | Attica |
| Kountourioti Street | 19015 | Rest of Attica | Attica |
| Kountourioti Street | 19006 | Rest of Attica | Attica |
| Kountourioti Street | 19018 | Rest of Attica | Attica |
| Kountourioti Street | 19500 | Rest of Attica | Attica |
| Kountouriotou Street | 19200 | Rest of Attica | Attica |
| Kourkota Street | 13342 | Rest of Attica | Attica |
| Kourmouli Dimitriou Street | 13343 | Rest of Attica | Attica |
| Kourou-Rinioti Street | 19200 | Rest of Attica | Attica |
| Kourtesi A. Street | 19011 | Rest of Attica | Attica |
| Koutalieri Mar. Street | 19200 | Rest of Attica | Attica |
| Koutsonika Lamprou Street | 13461 | Rest of Attica | Attica |
| Koutsonika Lamprou Street | 13343 | Rest of Attica | Attica |
| Koutsoukou D. Street | 19014 | Rest of Attica | Attica |
| Koutsoukou Ioan. Street | 19015 | Rest of Attica | Attica |
| Kouvidi G. Street | 19200 | Rest of Attica | Attica |
| Kozanis Street | 19006 | Rest of Attica | Attica |
| Kozanis Street | 13343 | Rest of Attica | Attica |
| Kozanis Street | 19300 | Rest of Attica | Attica |
| Kozoni Street | 13343 | Rest of Attica | Attica |
| Krassa Street | 19001 | Rest of Attica | Attica |