| Xouthou Street | 13344 | Rest of Attica | Attica |
| Xylokastrou Street | 19006 | Rest of Attica | Attica |
| Xylouri Nikou Street | 13342 | Rest of Attica | Attica |
| Yadon Street | 19015 | Rest of Attica | Attica |
| Yakinthon Street | 19014 | Rest of Attica | Attica |
| Yakinthou Street | 19015 | Rest of Attica | Attica |
| Yakinthou Street | 19100 | Rest of Attica | Attica |
| Yakinthou Street | 19012 | Rest of Attica | Attica |
| Yakinthou Street | 19001 | Rest of Attica | Attica |
| Ydras Street | 19015 | Rest of Attica | Attica |
| Ydras Street | 19014 | Rest of Attica | Attica |
| Ydras Street | 19100 | Rest of Attica | Attica |
| Ydras Street | 19008 | Rest of Attica | Attica |
| Ydras Street | 19600 | Rest of Attica | Attica |
| Ydras Street | 19001 | Rest of Attica | Attica |
| Ydras Street | 19018 | Rest of Attica | Attica |
| Ydras Street | 13461 | Rest of Attica | Attica |
| Ydras Street | 19200 | Rest of Attica | Attica |
| Ydras Street | 19300 | Rest of Attica | Attica |
| Ygeias Street | 19300 | Rest of Attica | Attica |
| Ylikis Street | 19008 | Rest of Attica | Attica |
| Ylikis Street | 13343 | Rest of Attica | Attica |
| Ymittou Street | 13461 | Rest of Attica | Attica |
| Ymittou Street | 13341 | Rest of Attica | Attica |
| Ymittou Street | 19300 | Rest of Attica | Attica |
| Ypatis Street | 19006 | Rest of Attica | Attica |
| Ypereidi Street | 13344 | Rest of Attica | Attica |
| Ypsilanti Alexandrou Street | 19600 | Rest of Attica | Attica |
| Ypsilanti Alexandrou Street | 13343 | Rest of Attica | Attica |
| Ypsilanti Alexandrou Street | 13341 | Rest of Attica | Attica |
| Ypsilanti Alexandrou Street | 19300 | Rest of Attica | Attica |
| Ypsilanti Alexandrou Street | 19200 | Rest of Attica | Attica |
| Ypsilanti Dimitriou Street | 13343 | Rest of Attica | Attica |
| Ypsilantou Alexandrou Street | 13461 | Rest of Attica | Attica |
| Ypsilantou Street | 19015 | Rest of Attica | Attica |
| Ypsilantou Street | 19015 | Rest of Attica | Attica |
| Ypsilantou Street | 19015 | Rest of Attica | Attica |
| Ypsilantou Street | 19008 | Rest of Attica | Attica |
| Ypsilantou Street | 19006 | Rest of Attica | Attica |
| Ypsilantou Street | 19018 | Rest of Attica | Attica |