| NAME | TEL CODE | TELEPHONE | CITY |
| Post Office (EL.TA) of Kithnos | 0281 | 31239 | KITHNOS |
| CITY | POSTAL CODE |
| AGIA IRINI | 840 06 |
| AGIOS DIMITRIOS | 840 06 |
| AGIOS STEFANOS | 840 06 |
| APOKRISSI | 840 06 |
| DRIOPIS | 840 06 |
| EPISKOPI | 840 06 |
| FLAMBOURIA | 840 06 |
| KALO LIVADI | 840 06 |
| KANALA | 840 06 |
| KITHNOS | 840 06 |
| LEFKES DRIOPIS | 840 06 |
| LOUTRA | 840 06 |
| MERIHAS | 840 06 |
| PANAGIA KANALA | 840 06 |
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