| Io | |
| Native Name: | Ίο |
| Native Name Lang: | el |
| Coordinates: | 34.9489°N 26.1275°W |
| Archipelago: | Cretan Islands |
| Country: | Greece |
| Country Admin Divisions Title: | Region |
| Country Admin Divisions: | Crete |
| Country Admin Divisions Title 1: | Regional unit |
| Country Admin Divisions 1: | Lasithi |
| Country Admin Divisions Title 2: | Municipality |
| Population: | 0 |
| Population As Of: | 2001 |
Io (Greek, Modern (1453-);: Ίο), is an uninhabited Greek islet, close to the coast of Lasithi, eastern Crete, and in the Libyan Sea. It is part of the Lefki municipality.