| Knidou Street | 10440 | Athens | Attica |
| Knosou Street | 11253 | Athens | Attica |
| Ko Street | 11257 | Athens | Attica |
| Kodratou Street | 10436, 10437 | Athens | Attica |
| Kodrigktonos Street | 10434, 11251, 11257, 11362 | Athens | Attica |
| Kodrika Panagioti Street | 10554 | Athens | Attica |
| Kodrou Street | 10558 | Athens | Attica |
| Koilis Street | 11852 | Athens | Attica |
| Kokkali Petrou Street | 11521 | Athens | Attica |
| Kokkerel Tsarls Street | 11364 | Athens | Attica |
| Kokkinaki Konstantinou Street | 11143 | Athens | Attica |
| Kokkini Michail Street | 11743 | Athens | Attica |
| Kokkinopoulou Street | 11141, 11255, 15669 | Athens | Attica |
| Kokkinou Nikolaou Street | 11141, 11142 | Athens | Attica |
| Kokkou Dimitriou Street | 11255 | Athens | Attica |
| Kolchidos Street | 11522 | Athens | Attica |
| Koletti Ioanni Street | 10677, 10681, 10682 | Athens | Attica |
| Koliatsou Square | 11254 | Athens | Attica |
| Kolofonos Street | 10446 | Athens | Attica |
| Kolokasi Kyriakou Street | 11476 | Athens | Attica |
| Kolokotroni Gennaiou Street | 11741, 11852 | Athens | Attica |
| Kolokotroni Theodorou Street | 10560, 10561, 10562 | Athens | Attica |
| Kolokotroni Theodorou Street | 11744 | Athens | Attica |
| Kolokynthous Street | 10436 | Athens | Attica |
| Kolonou Square | 10444 | Athens | Attica |
| Kolonou Street | 10436, 10437 | Athens | Attica |
| Komanon Street | 11142 | Athens | Attica |
| Komanou Street | 11363 | Athens | Attica |
| Kommenou Artis Street | 11364 | Athens | Attica |
| Komninon Street | 11472, 11473 | Athens | Attica |
| Komotinis Street | 11526 | Athens | Attica |
| Kondaki Andrea Street | 11476 | Athens | Attica |
| Kondylaki Ioanni Street | 11141 | Athens | Attica |
| Konemenou Nikolaou Street | 11525 | Athens | Attica |
| Koniari Byway | 11521 | Athens | Attica |
| Koniari Ioanni Street | 11471, 11521 | Athens | Attica |
| Konitsis Street | 10445 | Athens | Attica |
| Kononos Street | 11633, 11634 | Athens | Attica |
| Konopisopoulou Georgiou Street | 11524 | Athens | Attica |
| Konstanta Grigoriou Street | 11143 | Athens | Attica |