| Adelfoi Islets | |
| Native Name: | Αδελφοί |
| Native Name Lang: | el |
| Coordinates: | 39.12°N 23.98°W |
| Map: | Greece |
| Archipelago: | Sporades |
| Total Islands: | 2 |
| Elevation M: | 50 |
| Country: | Greece |
| Country Admin Divisions Title: | Region |
| Country Admin Divisions: | Thessaly |
| Country Admin Divisions Title 1: | Regional unit |
| Country Admin Divisions 1: | Sporades |
| Country Admin Divisions Title 2: | Municipality |
| Population: | 11 |
| Population As Of: | 2001 |
| Postal Code: | 370 05 |
| Area Code: | 24240 |
| Registration Plate: | BO |
The Adelfoi Islets (Greek, Modern (1453-);: Αδελφοί, "brothers") are two Greek islands in the Sporades. They are located about 10km (10miles) east-southeast of the main island of Alonnisos and also administered by a municipality of the same main island name. The 2001 census reported a population of eleven inhabitants.
Its nearest islands and islets are Alonnisos and Peristera, Skantzoura to the east and Euboea further south.