The Kingdom of Ormus is a tenth to seventeenth century kingdom located within the Persian Gulf and extending as far as the Strait of Hormuz.

The Kingdom is established by Arab princes in the tenth century who in 1262 come under the suzerainty of Persia, before becoming a client state of the Portuguese Empire.The kingdom receives its name from the fortified port city that serves as its capital.

It is one of the most important ports in the Middle East at this time as it controls seaway trading routes through the Persian Gulf to India and East Africa.

This port is probably located on Hormuz Island, which is located near the modern city of Bandar-e Abbas.The name of the port, the island, and the kingdom is Iranian and ultimately derives from that of the Zoroastrian deity, Ahura Mazda, which becomes Ohrmazd in Pahlavi, Hirmiz in Manichaean Middle Persian, and Hormoz in New-Persian.The Strait of Hormuz is a narrow, strategically important waterway between the Gulf of Oman in the southeast and the Persian Gulf in the southwest.

On the north coast is Iran and on the south coast is the United Arab Emirates and Musandam, an exclave of Oman.