Group of islands in southeast Asia, between the Indian and Pacific oceans
- Brunei - Territory in the island of Borneo in southeast Asia, ruled since 1984 by the Negara Brunei Darussalam
- Indonesia - Territory in southeast Asia, ruled since 1959 by the Republik Indonesia
- Malaysia - Territory in southeast Asia, ruled since 1963 by the Yang di-Pertuan Agong and the Prime Minister of Malaysia
- Papua New Guinea - Territory in the island of New Guinea in the Pacific Ocean, ruled since 1975 by the Independent State of Papua New Guinea
- Philippines - Archipelago in the western Pacific Ocean, ruled since 1946 by the Republika ng Pilipinas
- Singapore - Islands in southeast Asia, ruled since 1965 by the Xīnjiāpō Gònghéguó/Republic of Singapore
- Timor, East - Territory in islands in southeast Asia, ruled since 2002 by the Repúblika Demokrátika Timór-Leste