I
| Ancient name | Location | Modern name | Also known as |
| Ialysos | Rhodes | ||
| Iasus | Caria, south-west Turkey | abandoned | Iassus (Iασoς, Iασσoς), Askem, Asýn Kalessi |
| Idalium | Cyprus | Dali | Idalion (Ιδάλιον) |
| Imbros | Greek island in northern Aegean Sea | Gökçeada | İmroz, Imvros (Ίμβρος) |
| Iolcus | Thessaly, eastern Greece | Iolkos (Ιωλκός) | |
| Itanos | North-eastern Crete | Erimopolis | |
| Ithaca | island in the Ionian Sea | Ithaka, Ithaki, (Ιθάκη) |
Read more about this topic: List Of Ancient Greek Cities