Katonisi (Greek: Κατονήσι, "lower island") is an uninhabited islet close to the southern coast of Crete in the Libyan Sea. It is administered from the municipality of Sfakia, in Chania regional unit.
Native name: Κατονήσι | |
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| Geography | |
| Coordinates | 35°10′40″N 24°14′07″E / 35.17778°N 24.23528°E |
| Archipelago | Cretan Islands |
| Administration | |
Greece | |
| Region | Crete |
| Regional unit | Chania |
| Demographics | |
| Population | 0 (2001) |