Geography

Strait of Hormuz

Also: Hormuz Strait, Hormuz

Definition
The Strait of Hormuz is the narrow sea passage between Iran to the north and the Musandam peninsula of Oman to the south, linking the Persian Gulf with the Gulf of Oman and the Arabian Sea, and one of the world's most important routes for oil and gas exports.
Summary card: Strait of Hormuz. Links the Persian Gulf with the Gulf of Oman. Between Iran and Oman's Musandam peninsula. About 33 km wide at its narrowest point. Roughly a fifth of global oil use passes through it. Chabahar port lies outside the strait in south-east Iran
Summary card © UPSCPrep.in

Background and evolution

The Persian Gulf is a shallow sea surrounded by some of the world's largest oil and gas producers: Saudi Arabia, Iraq, Kuwait, the United Arab Emirates, Qatar, Bahrain and Iran. Its only sea outlet is the Strait of Hormuz, which curves around the Musandam peninsula, an exclave of Oman. Shipping lanes in the strait are narrow, with inbound and outbound lanes separated by a buffer zone under a traffic separation scheme. Islands such as Qeshm, Hormuz, Larak, and the disputed Abu Musa and the Tunbs lie in or near the strait.

The strait has been important for trade since ancient times. The medieval island port of Hormuz was a hub for trade between Persia, India and Arabia, and the Portuguese captured it in 1515 before an Anglo-Persian force drove them out in 1622. In the modern era, its significance comes from energy. During the Iran–Iraq war of the 1980s, attacks on tankers in the "Tanker War" led navies to escort ships. In recent years, seizures of tankers, attacks on ships and threats by Iran to close the strait during crises have kept it at the centre of global energy security concerns.

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Last reviewed: 23 October 2026 · Original UPSCPrep.in content.