Lombok is an island
An island or isle is any piece of sub-continental land that is surrounded by water. Very small islands such as emergent land features on atolls can be called islets, cays or keys. An island in a river or lake may be called an eyot , or holm...

 in West Nusa Tenggara
West Nusa Tenggara
West Nusa Tenggara is a province in south-central Indonesia. The province encompasses the western portion of the Lesser Sunda Islands, except for Bali as the Wallace line running the length of the Lombok Strait forms the western boundary of the province....

 (Nusa Tenggara Barat or NTB) province, Indonesia
Indonesia , officially the Republic of Indonesia , is a country in Southeast Asia and Oceania. Indonesia is an archipelago comprising approximately 13,000 islands. It has 33 provinces with over 238 million people, and is the world's fourth most populous country. Indonesia is a republic, with an...

. It forms part of the chain of the Lesser Sunda Islands
Lesser Sunda Islands
The Lesser Sunda Islands or Nusa Tenggara are a group of islands in the southern Maritime Southeast Asia, north of Australia. Together with the Greater Sunda Islands to the west they make up the Sunda Islands...

, with the Lombok Strait
Lombok Strait
The Lombok Strait is a strait connecting the Java Sea to the Indian Ocean, located between the islands of Bali and Lombok in Indonesia. The Gili Islands are on the Lombok side....

 separating it from Bali
Bali is an Indonesian island located in the westernmost end of the Lesser Sunda Islands, lying between Java to the west and Lombok to the east...

 to the west and the Alas Strait
Alas Strait
Alas Strait separates Lombok and Sumbawa, two islands of Indonesia in West Nusa Tenggara province.The strait was bridged by land until about 14,000 years before present when sea level rose to about 75 meters below present sea level,...

 between it and Sumbawa
Sumbawa is an Indonesian island, located in the middle of the Lesser Sunda Islands chain, with Lombok to the west, Flores to the east, and Sumba further to the southeast. It is in the province of West Nusa Tenggara....

 to the east. It is roughly circular, with a "tail" (Sekotong Peninsula) to the southwest, about 70 km across and a total area of about 4,725 km² (1,825 sq mi). The provincial capital and largest city on the island is Mataram
Mataram (city)
Mataram is the capital of the Province of West Nusa Tenggara . The city is situated within Lombok Barat Regency and lies on the western side of the island of Lombok, Indonesia...