| Irakleous Street | 84100 | Syros | Cyclades |
| Irodotou Street | 84100 | Syros | Cyclades |
| Iroon Polytechneiou Street | 84100 | Syros | Cyclades |
| Iroon Square | 84100 | Syros | Cyclades |
| Iroon Street | 84100 | Syros | Cyclades |
| Isidorou N. Street | 84100 | Syros | Cyclades |
| Kadmou Street | 84100 | Syros | Cyclades |
| Kairi Evanthias Street | 84100 | Syros | Cyclades |
| Kalavryton Street | 84100 | Syros | Cyclades |
| Kalomenopoulou K. Street | 84100 | Syros | Cyclades |
| Kalypsous Street | 84100 | Syros | Cyclades |
| Kampani Street | 84100 | Syros | Cyclades |
| Kampani Zanni Street | 84100 | Syros | Cyclades |
| Kanaki A. Street | 84100 | Syros | Cyclades |
| Kanari Konstantinou Street | 84100 | Syros | Cyclades |
| Kanari Square | 84100 | Syros | Cyclades |
| Kapodistria Ioanni Street | 84100 | Syros | Cyclades |
| Kapodistria Ioanni Street | 84100 | Syros | Cyclades |
| Karagatsi M. Street | 84100 | Syros | Cyclades |
| Karagiannaki Street | 84100 | Syros | Cyclades |
| Karagianni Lelas Street | 84100 | Syros | Cyclades |
| Karagianni Lelas Street (intersects with Vafeiadaki Street) | 84100 | Syros | Cyclades |
| Karagiorga Saki Street | 84100 | Syros | Cyclades |
| Karaiskaki Georgiou Street | 84100 | Syros | Cyclades |
| Karaiskaki Georgiou Street | 84100 | Syros | Cyclades |
| Karamanli Konstantinou Street | 84100 | Syros | Cyclades |
| Karaoli & Dimitriou Street | 84100 | Syros | Cyclades |
| Karezi Tzenis Street | 84100 | Syros | Cyclades |
| Karga Andrea Street | 84100 | Syros | Cyclades |
| Karga Andrea Street | 84100 | Syros | Cyclades |
| Karkavitsa Andrea Street | 84100 | Syros | Cyclades |
| Kasou Street | 84100 | Syros | Cyclades |
| Kassandras Street | 84100 | Syros | Cyclades |
| Katadromikou Elli Coast | 84100 | Syros | Cyclades |
| Katraki Manou Street | 84100 | Syros | Cyclades |
| Katramadou Street | 84100 | Syros | Cyclades |
| Katsoni Lamprou Street | 84100 | Syros | Cyclades |
| Kavvadia Street | 84100 | Syros | Cyclades |
| Kazantzaki G. Street | 84100 | Syros | Cyclades |
| Keas Street | 84100 | Syros | Cyclades |