Sitra (Arabic: سترة or Arabic: سِتْرَة, also: As Sitra, Jazīrat Sitrah and Jazīrat as Sitra) is an island in the Central Governorate of Bahrain, just east of Bahrain Island in Persian Gulf. It lies south of Manama and Nabih Saleh. The island's western coast forms the boundary of Tubli Bay. Most of the inhabitants of the island live in seven historic villages: Wadyan, Al Kharijiya, Marquban, Al Garrya, Mahazza, Sufala, and Abul Aish. The population is almost entirely Bahrani Shia Muslim, however some Indians and Pakistanis also live in the island.
The island used to be covered in date palm groves and farms, watered by several freshwater springs, and the island's economy used to be based on agriculture and fishing. Mangroves used to line the western coast, however they have almost disappeared due to development. The northern section of the island has been turned into an industrial area. Bapco oil storage reservoirs are located in the south. Sitra is also the terminus of the 42-km Dhahran-Sitra natural gas pipeline, which connects it to Dahran in Saudi Arabia.[