|Administrative region||Ionian Islands|
|Municipality||Central Corfu and Diapontian Islands|
|• Municipal unit||4.449 km2 (1.718 sq mi)|
|• Municipal unit||496|
|• Municipal unit density||110/km2 (290/sq mi)|
|Time zone||UTC+2 (EET)|
|• Summer (DST)||UTC+3 (EEST)|
Erikoussa (Greek: Ερεικούσσα, Italian: Merlera) is an island and a former community of the Ionian Islands, Greece. It is one of the Diapontian Islands; an island complex to the northwest of Corfu. Since the 2019 local government reform it is part of the municipality of Central Corfu and Diapontian Islands, of which it is a municipal unit. It is located off the northwestern coast of the island of Corfu, and is almost equidistant from Corfu to the southeast, Mathraki to the southwest, and Othonoi to the west. Its population was 496 in the 2011 census, and its land area is 3.65 square kilometres (1 sq mi). The municipal unit has an area of 4.449 km2. It has six settlements; the main one is Porto (Πόρτο), which is also where the only port is located. The island has dense vegetation and three beaches; Porto (Πόρτο), Bragini (Μπραγκίνι), and Fiki (Φύκι). The name Ereikoussa derives from the plant ereíki (ερείκη), which can be found throughout the island.