Tiga Island is a small, uninhabited volcanic island located in Kimanis Bay within the Interior Division of Sabah, Malaysia. Situated off the western coast of the Kuala Penyu District, the island covers an area of 607 hectares and features active mud volcanoes at its highest point.
The island is one of three landmasses that comprise Tiga Island Park (TIP), alongside Kalampunian Besar and Kalampunian Damit islands. The park headquarters are situated on the island, providing an office complex and accommodation for visiting scientists and park staff. The surrounding waters serve as a destination for various water sports, including scuba diving, deep diving, kayaking, and snorkelling.