Kharg or Khark Island is a continental island of Iran in the Persian Gulf. The island is 25 km (16 mi) off the coast of Iran and 483 km (300 mi) northwest of the Strait of Hormuz. Its total area is 20 km2 (7.7 sq mi). Administered by the adjacent coastal Bushehr Province, Khark Island provides a sea port for the export of oil and extends Iranian territorial sea claims into the Persian Gulf oil fields. Located on Khark Island is Khark, the only city in the Khark District.

The Strait of Hormuz is a strait between the Persian Gulf and the Gulf of Oman. It provides the only sea passage from the Persian Gulf to the open ocean and is one of the world's most strategically important choke points. On the north coast lies Iran, and on the south coast lies the Musandam peninsula, shared by the United Arab Emirates and the Musandam Governorate, an exclave of Oman. The strait is about 90 nautical miles (167 km) long, with a width varying from about 52 nmi (96 km) to 21 nmi (39 km).