| Siokou Byway | 18233 | Athens - Piraeus | Attica |
| Sipylou Street | 12351 | Athens - Piraeus | Attica |
| Sipylou Street | 17237 | Athens - Piraeus | Attica |
| Sipylou Street | 17122 | Athens - Piraeus | Attica |
| Sipylou Street | 16233 | Athens - Piraeus | Attica |
| Sirangiou Street | 18534 | Athens - Piraeus | Attica |
| Sisini Georgiou Street | 13343 | Athens - Piraeus | Attica |
| Sisini Georgiou Street | 12131 | Athens - Piraeus | Attica |
| Sisini Georgiou Street | 11528 | Athens - Piraeus | Attica |
| Sismani Konstantinou Street | 11743 | Athens - Piraeus | Attica |
| Sismanogleiou Street | 15126 | Athens - Piraeus | Attica |
| Sismanogleiou Street | 15235 | Athens - Piraeus | Attica |
| Sismanogleiou Street | 15127 | Athens - Piraeus | Attica |
| Sismanoglou Konstantinou Street | 15452 | Athens - Piraeus | Attica |
| Sistou 2 Byway | 18450 | Athens - Piraeus | Attica |
| Sistou Street | 18757, 18758 | Athens - Piraeus | Attica |
| Sistou Street | 10445 | Athens - Piraeus | Attica |
| Sistou Street | 18450, 18454 | Athens - Piraeus | Attica |
| Sisyfou Street | 12135 | Athens - Piraeus | Attica |
| Sitakis Street | 11141, 11142 | Athens - Piraeus | Attica |
| Siteias Street | 15238 | Athens - Piraeus | Attica |
| Siteias Street | 14451 | Athens - Piraeus | Attica |
| Siteias Street | 13122 | Athens - Piraeus | Attica |
| Siteias Street | 13561 | Athens - Piraeus | Attica |
| Siteias Street | 12351 | Athens - Piraeus | Attica |
| Siteias Street | 11523 | Athens - Piraeus | Attica |
| Siteias Street | 16672 | Athens - Piraeus | Attica |
| Sithonias Street | 13343 | Athens - Piraeus | Attica |
| Sithonias Street | 11522 | Athens - Piraeus | Attica |
| Sivitanidi Vasileiou Street | 12137 | Athens - Piraeus | Attica |
| Sivitanidi Vasileiou Street | 17675, 17676 | Athens - Piraeus | Attica |
| Sivoron Street | 11142 | Athens - Piraeus | Attica |
| Sivyllis Street | 14671 | Athens - Piraeus | Attica |
| Skalidi Anagnosti Street | 11525 | Athens - Piraeus | Attica |
| Skalistiri Dimitriou Street | 11253 | Athens - Piraeus | Attica |
| Skalkota Nikou Street | 15126 | Athens - Piraeus | Attica |
| Skalkota Nikou Street | 15235 | Athens - Piraeus | Attica |
| Skalkota Nikou Street | 13342 | Athens - Piraeus | Attica |
| Skalkota Nikou Street | 12462 | Athens - Piraeus | Attica |
| Skalkota Nikou Street | 11525 | Athens - Piraeus | Attica |