Badu or Badu Island (/ˈbɑːduː/; Kala Lagaw Ya: Badhu, pronounced [bad̪u]; also Mulgrave Island), is an island in the Torres Strait 60 kilometres (37 mi) north of Thursday Island, Queensland, Australia. Badu Island is also a locality in the Torres Strait Island Region, and Wakaid is the only town, located on the south-east coast. This island is one of the Torres Strait Islands. The language of Badu is Kala Lagaw Ya.
The Mura Badulgal (Torres Strait Islanders) Corporation administers land on behalf of the Badulgal people. The Badulgal people's ownership of Badu and surrounding islands in the Torres Strait was recognised in a native title determination on 1 February 2014, when the Queensland Government handed over to the Badhulgal traditional owners freehold title to 9,836 hectares (24,310 acres) of land. The Mura Badulgal (Torres Strait Islanders) Corporation (an RNTBC) administers land on behalf of the Badulgal people.