| Street | Postal Code | City | Prefecture |
|---|---|---|---|
| Kerameikou Street | 18451 | Nikaia Attica | Attica |
| Kerasountos Street | 18454 | Nikaia Attica | Attica |
| Kilikias 1 Byway | 18450 | Nikaia Attica | Attica |
| Kilikias Street | 18450, 18453 | Nikaia Attica | Attica |
| Kilkis Street | 18452 | Nikaia Attica | Attica |
| Kimonos Street | 18454 | Nikaia Attica | Attica |
| Kinikiou Street | 18450 | Nikaia Attica | Attica |
| Kitiou Street | 18453 | Nikaia Attica | Attica |
| Klearchou Street | 18452 | Nikaia Attica | Attica |
| Kleopatras Street | 18450 | Nikaia Attica | Attica |
| Knosou Street | 18451 | Nikaia Attica | Attica |
| Kolchidos Street | 18454 | Nikaia Attica | Attica |
| Kolokotroni Theodorou Street | 18450 | Nikaia Attica | Attica |
| Komninon Street | 18454 | Nikaia Attica | Attica |
| Komninou Diomidi Street | 18452 | Nikaia Attica | Attica |
| Komotinis Street | 18454 | Nikaia Attica | Attica |
| Konitsis Street | 18454 | Nikaia Attica | Attica |
| Konstantinoupoleos Street | 18451 | Nikaia Attica | Attica |
| Korai Stylianou Street | 18452 | Nikaia Attica | Attica |
| Korinthou Street | 18453 | Nikaia Attica | Attica |
| Korytsas Street | 18453 | Nikaia Attica | Attica |
| Kotyoron Street | 18454 | Nikaia Attica | Attica |
| Koutaisi Street | 18451, 18452, 18453 | Nikaia Attica | Attica |
| Kresnas Street | 18450 | Nikaia Attica | Attica |
| Kriezoti Nikolaou Street | 18452 | Nikaia Attica | Attica |
| Krinis Street | 18454 | Nikaia Attica | Attica |
| Kritis Street | 18453 | Nikaia Attica | Attica |
| Kritonos Street | 18452 | Nikaia Attica | Attica |
| Kromnis Street | 18450, 18454 | Nikaia Attica | Attica |
| Kronou Street | 18452 | Nikaia Attica | Attica |
| Krystalli Kosta Street | 18452 | Nikaia Attica | Attica |
| Kyprion Agoniston Street | 18450 | Nikaia Attica | Attica |
| Kyprou Street | 18450, 18451, 18453 | Nikaia Attica | Attica |
| Kyras Ro Street | 18451 | Nikaia Attica | Attica |
| Kyzikou Street | 18451 | Nikaia Attica | Attica |
| Lakonias Street | 18450 | Nikaia Attica | Attica |
| Lampaditi Athanasiou Street | 18452 | Nikaia Attica | Attica |
| Lampraki Grigoriou Avenue | 18451, 18452, 18453, 18454 | Nikaia Attica | Attica |
| Lampsakou Street | 18450 | Nikaia Attica | Attica |
| Laodikeias Street | 18451, 18453 | Nikaia Attica | Attica |