Sebuku (also spelled Seboekoe or Sebeekee) is an island in the Sunda Strait between Java and Sumatra.

[4] In 1999, a sunken Japanese ship was found near Sebuku by divers preparing for an underwater photography contest.

[8] The substrate on the northern side of the island consists of fossilised coral, mud and sand, while on the eastern side of the island, the substrate consists of mud, sand, gravel, and both live and fossilised coral.

[9] Sebuku and Sebesi have been noted as a "stepping stone" for butterfly migration between Sumatra and Krakatoa.

[9] Sebuku is a popular destination for snorkelling and diving, with tourists generally arriving by boat from Candi village on Sumatra.