|Native name: Αδελφοί|
|Highest elevation||50 m (160 ft)|
|Postal code||370 05|
The Adelfoi Islets (Greek: Αδελφοί, "brothers") are two Greek islands in the Sporades. They are located about 10 kilometres (6.2 mi) 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.