Mount Adolphus Island, also called Muri or Mori in the native language, is an island of the Torres Strait Islands archipelago that is located at the very tip of Cape York Peninsula on the northern side of the Adolphus Channel, across from Albany Island and about 40 kilometres (25 mi) northeast of Bamaga in the far north region of Queensland, Australia.

It measures 6.74 square kilometres (2.60 sq mi) in area.

It is located 10.1 kilometres (6.3 mi) from the Australian mainland.

The island's highest elevation is the flat-topped Mount Adolphus (10°37′56″S 142°39′32″E / 10.6323°S 142.6589°E / -10.6323; 142.6589 (Mount Adolphus)) at the height of 178 metres (584 ft) above mean sea level.

[1] Coastal features on Mount Adolphus Island include (clockwise from north): Djagaraga (also known as Yadhaigana, Dyagaraga and Yagulleone) is of the languages from the tip of Cape York.