Sumbawa is an Indonesian island in the middle of the Lesser Sunda Islands chain. It has Lombok to the west, Flores to the east, and Sumba farther to the southeast. It is in the province of West Nusa Tenggara.
Sumbawa is 15,448 km² (three times the size of Lombok). About 1.5 million people live there. It marks the boundary between the islands to the west, which were influenced by religion and culture spreading from India, and the region to the east that was not so influenced.