|Native name: 남해도|
|Area||300 km2 (120 sq mi)|
|Highest elevation||786 m (2,579 ft)|
Namhaedo or Namhae Island is the principal island of Namhae County, on the southern coast of South Gyeongsang Province, South Korea. It is the fifth largest island in South Korea. Together with Changseon Island, it forms Namhae County.
It is joined to land by Namhae Bridge.