Colebrooke Island is an island of the Andaman Islands. It belongs to the North and Middle Andaman administrative district, part of the Indian union territory of Andaman and Nicobar Islands. The island lies north from Port Blair. It is named after Robert Hyde Colebrooke who surveyed the region along with Archibald Blair.
The island belongs to the East Baratang Group and lies east of Baratang.
Politically, Colebrooke Island, along neighboring East Baratang Group, is part of Rangat Taluk.