Bunguran Island or just Bunguran is the main island of the Middle Natuna Archipelago, which is part of the Riau Islands Province in Indonesia. It is also called Great Natuna Island.

Natuna Regency is an islands regency located in the northernmost part of the Province of Riau Islands, Indonesia. It contains at least 154 islands, of which 127 of them are reported as uninhabited. This archipelago, with a land area of 1,978.31 km2 out of a total area of 264,198.37 km2 area, contains 15 districts, including the island district of Pulau Laut, Bunguran/Greater Natuna Island, the island district of Pulau Tiga, the island district of Midai, the island district of Subi, and the island district of Serasan.