木岛(法罗语：Viðoy)是法罗群岛最北端的岛屿。该岛虽名为“木岛”，但岛上并没有树木。“木岛”一名与来自西伯利亚与北美的漂流木有关。该岛面积41 km²(居第7位)，总人口617 (2002)。该岛最高点841m。岛上共有11座山峰。

Viðoy (Danish:Viderø) is the northern-most island in the Faroe Islands, located east of Borðoy to which it is linked via a causeway. The name means wood island, despite the fact that no trees grow on the island: the name relates to the driftwood that floats in from Siberia and North America.