Nusa Lembongan is an island located southeast of Bali, Indonesia. It is part of a group of three islands that make up the Nusa Penida District in Klungkung Regency, of which it is the most famous of the three islands of Nusa Penida, Nusa Lembongan, and Nusa Ceningan - known together as the "Nusa Islands". This island group, in turn, is part of the Lesser Sunda Islands.