The Kingdom of Hormuz (also known as Hormoz or, archaically, Ormus; Persian: هرمز; Portuguese: Ormuz) was located in the eastern side of the Persian Gulf and extended as far as Bahrain in the west at its zenith. The Kingdom was established in the 11th century initially as a dependency of the Kerman Seljuk Sultanate, and later as an autonomous tributary of the Salghurid Turkmens and the Ilkhanates. In its last phase Hormuz became a client state of the Portuguese Empire in the East.
The island was a major economic base of economic exchanges and marine trade as an important port between the Persian Gulf and the Indian Ocean. This port was originally located on the southern coast of Iran to the east of the Strait of Hormuz, near the modern city of Minab, and was later relocated to the island of Jarun which came to be known as Hormuz Island, which is located near the modern city of Bandar-e Abbas.