| Street | Postal Code | City | Prefecture |
|---|---|---|---|
| Xanthou Street | 84100 | Syros | Cyclades |
| Xenofanous Street | 84100 | Syros | Cyclades |
| Xenofontos Street | 84100 | Syros | Cyclades |
| Xenopoulou Street | 84100 | Syros | Cyclades |
| Xirokampou Street | 84100 | Syros | Cyclades |
| Xochaki Evang. Street | 84100 | Syros | Cyclades |
| Xouthou Street | 84100 | Syros | Cyclades |
| Ydras Street | 84100 | Syros | Cyclades |
| Ypsilantou Street | 84100 | Syros | Cyclades |
| Zalongou Street | 84100 | Syros | Cyclades |