The Sermata Islands or Sematang Islands (formerly called Mdona Hyera), is a small group of islands within the Southwest Maluku Regency, part of Maluku (province) in Indonesia. The group is located south of the Damer Islands, east of the Letti Islands and west of the Babar Islands.
They originally formed the Mdona Hyera District (Kecamatan Mdona Hyera) within the regency, but by 2023 were renamed "Luang Sermata" District. They consist of the main island of Pulau Sermatang and the much smaller island of Pulau Luang to its west, together with smaller islands situated between the two - notably Kelapa, Kepury and Tiara Islands. Other small and generally unpopulated islands form part of the district, including Liakra and Matumara Islands off Luang, Letutun and Lailawan to the west of the main group, Amoertaun and Meatiaram even further to the west, and Metimarang to the southwest.
Sermata Island had 3,640 inhabitants in mid 2021[1] resident in nine villages - Elo, Rumkisar, Lelang, Romdara, Mahaleta, Rotnama, Batugajah, Pupliora and Regoha. Luang Island consisted of two main parts, together with a number of islets of the coast; the main sections are Luang Timur with 1,163 inhabitants, and Luang Barat with 831 inhabitants in 2021. The whole district had 6,365 inhabitants in mid 2023.[2]