Several weavers are found on islands only, in particular the fodies in the Indian Ocean islands, 2 Ploceus weavers on Madagascar, and 3 Ploceus weavers on the Gulf of Guinea islands.

Many mainland weavers also occur on oceanic islands, either as introduced species (eg Village Weaver in Mauritius) or naturally (eg Cape weavers on Robben Island, or ). Weavers often also breed on small islands in lakes and rivers (eg Orange Weaver on the Sese Islands in Lake Victoria).

Weavers endemic to Madagascar:
Nelicourvi Weaver Ploceus nelicourvi
Sakalava Weaver Ploceus sakalava
Red Fody Foudia madagascariensis - also introduced to many other islands
Forest Fody Foudia omissa

Weavers endemic to smaller Indian Ocean islands:
Aldabra Fody Foudia aldabrana - Aldabra
Mauritius Fody Foudia rubra - Mauritius
Red-headed Fody Foudia eminentissima - Comoros
Rodrigues Fody Foudia flavicans - Rodrigues
Seychelles Fody Foudia sechellarum - Seychelles

Weavers endemic to Gulf of Guinea islands:
Principe Golden Weaver Ploceus princeps - Principe
Giant Weaver Ploceus grandis - Sao Tome
Sao Tome Weaver Ploceus sanctithomae - Sao Tome