| Prasonisi | |
| Native Name: | Πρασονήσι |
| Native Name Lang: | el |
| Coordinates: | 34.8728°N 24.075°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: | Chania |
| Country Admin Divisions Title 2: | Municipality |
| Population: | 0 |
| Population As Of: | 2001 |
Prasonisi (Greek, Modern (1453-);: Πρασονήσι, "leek island"), is a small islet off the southern coast of Crete, close to the northern coast of the island of Gavdos and between Gavdos and the islet of Gavdopoula, in the Libyan Sea. Administratively, it is located within the municipality of Gavdos, in Chania regional unit.