Oman, officially the Sultanate of Oman, is a country in the southeastern Arabian Peninsula in West Asia. It shares land borders with Saudi Arabia, the United Arab Emirates, and Yemen, and maritime borders with Iran and Pakistan. Its coastline extends along the Arabian Sea to the southeast and the Gulf of Oman to the northeast. The exclaves of Madha and Musandam are surrounded by the United Arab Emirates on their land borders, while Musandam's coastal boundaries are formed by the Strait of Hormuz and the Gulf of Oman. With an area of 315,331 km2 (121,750 sq mi) and a population of approximately 5.46 million, Oman is the third-largest country on the Arabian Peninsula. Muscat is the capital and largest city, Islam is the state religion, and Arabic is the official language.
Oman is the oldest independent state in the Arab world, and has been continuously ruled by the Al Bu Said dynasty since 1744. Beginning in the 17th century, Oman emerged as a major regional power, expelling the Portuguese from its coastal possessions and establishing an empire that competed with the British and Portuguese for influence in the Persian Gulf and the Indian Ocean. At its peak in the 19th century, Omani influence and control extended across the Strait of Hormuz to what later became Iran and Pakistan, and as far south as Zanzibar. In the 20th century, Oman came under the influence of the British Empire while de jure remaining sovereign.
Oman's oil reserves are ranked as the 22nd largest globally. In 2010, the United Nations Development Programme recognised Oman as the most improved country in the world in terms of development during the preceding 40 years. A portion of Oman's economy involves tourism, and trade of fish, dates and other agricultural produce. The World Bank classifies Oman as a high-income economy. As of 2024, Oman ranks as the 42nd most peaceful country in the world in the Global Peace Index and the third-most peaceful country in the Middle East and North Africa.
Oman is an absolute monarchy ruled by a sultan, who serves as both head of state and head of government. Executive authority is exercised through the Council of Ministers, while the bicameral Council of Oman consists of the appointed Council of State and the elected Consultative Assembly.
Qaboos bin Said served as sultan from 1970 until his death in 2020. His nearly five-decade reign marked the beginning of a period of rapid modernization now known as the Omani Renaissance, which saw a rise in the country's living standards, the abolition of slavery, the end of the Dhofar Rebellion, and the promulgation of Oman's constitution. In 2020, Haitham bin Tariq succeeded Qaboos as the Sultan of Oman. Oman is a member of the United Nations, the Arab League, the Gulf Cooperation Council, the Non-Aligned Movement, and the Organisation of Islamic Cooperation.
The oldest known written mention of "Oman" is found on a tomb in the Mleiha Archeological Center in the United Arab Emirates, dated to around 220 BCE, where it is written as 𐩲𐩣𐩬 in Ancient South Arabian and 𐡏𐡌𐡍 in Aramaic.
The name "Oman" is believed to predate Pliny the Elder's reference to "Omana" and Ptolemy's reference to "Omanon". (Ὄμανον ἐμπόριον in Greek).
Beginning in the 19th century, most writers localised Omana with Sohar. This changed, however, with the advent of archaeology.
The city or region is commonly etymologised in Arabic as deriving from ʿāmin or ʿamūn, meaning 'settled' people, in contrast to the nomadic Bedouins. While some theories propose an eponymous founder—such as Oman bin Ibrahim al-Khalil, Oman bin Siba' bin Yaghthan bin Ibrahim, and Oman bin Qahtan—others suggest that "Oman" originates from a valley in Ma'rib, Yemen. This valley is presumed to be the ancestral homeland of the Azd, an ancient Bedouin tribe mentioned in pre-Islamic inscriptions, particularly in Sabaic inscriptions from the reign of Sha'r Awtar (210–230 CE).
Oman has been known by other names. The ancient Sumerians and the Mesopotamians called it "Magan", a reference to the Magan civilisation, while the Persians called it Mazun, derived from the word "Muzn", meaning clouds and abundant flowing water, which explains the establishment and prosperity of agriculture in Oman since ancient times and the stability and civilisation that accompanied it. The name "Oman" is mentioned in Arabic sources as an independent region. Al-Istakhri and Ibn Hawqal referred to this in their sayings: "Oman is a region with independent regions with spacious people". Ibn Khaldun was more explicit in his definition of Oman. He mentioned it among the Arab regions that emerged as independent states in the Arabian Peninsula, namely Yemen, the Hijaz, Hadhramaut, Ash Shihr, and Oman. He described its system of government, saying that it was a "sole sultanic region."
Al Aybut Al Awal, in the Dhofar Governorate of Oman, a site was discovered in 2011 containing more than 100 surface scatters of stone tools, belonging to a regionally specific African lithic industry—the late Nubian Complex—known previously only from the northeast and Horn of Africa. Two optically stimulated luminescence age estimates place the Arabian Nubian Complex at 106,000 years old. This supports the proposition that early human populations moved from Africa into Arabia during the Late Pleistocene.
In recent years surveys have uncovered Palaeolithic and Neolithic sites on the eastern coast. Main Palaeolithic sites include Saiwan-Ghunaim in the Barr al-Hikman. Archaeological remains are particularly numerous for the Bronze Age Umm an-Nar and Wadi Suq periods. At the archaeological sites of Bat, Al-Janah, and Al-Ayn wheel-turned pottery, hand-made stone vessels, metals industry artifacts, and monumental architecture have been preserved.
Sumerian tablets referred to Oman as "Magan" and in the Akkadian language "Makan", a name that links Oman's ancient copper resources. This is a clear reference to the Magan civilisation, an ancient region in what is now modern day Oman and United Arab Emirates, which was referred to in Sumerian cuneiform texts of around 2300 BCE and existed until 550 BCE as a source of copper and diorite for Mesopotamia. There are six periods of human settlement with distinctive behaviours in Northern Oman before Islam, which include the Hafit period from 3,200 to 2,600 BCE, the Umm Al Nar culture from 2,600 to 2,000 BCE, and the Wadi Suq culture from 2,000 to 1,300 BCE.
Iron Age to pre-Islamic period
During the 8th century BCE, it is believed that the Yaarub, the descendant of Qahtan, ruled the entire region of Yemen, including Oman. Wathil bin Himyar bin Abd-Shams (Saba) bin Yashjub (Yaman) bin Yarub bin Qahtan later ruled Oman. It is thus believed that the Yaarubah were the first settlers in Oman from Yemen.
In the 1970s and 1980s, scholars like John C. Wilkinson believed by virtue of oral history that in the 6th century BCE, the Achaemenids exerted control over the Omani peninsula, most likely ruling from a coastal centre such as Suhar. The northern half of Oman was presumably part of the Maka satrapy of the Persian Achaemenid Empire. By the time of the conquests of Alexander the Great, the satrapy may have existed in some form.
Central Oman has its own indigenous Samad Late Iron Age cultural assemblage named eponymously from Samad al-Shan. In the northern part of the Oman Peninsula the Recent Pre-Islamic Period begins in the 3rd century BCE and extends into the 3rd century CE. Whether or not Persians brought south-eastern Arabia under their control is a moot point, since the lack of Persian archaeological finds speak against this belief. Armand-Pierre Caussin de Perceval suggests that Shammir bin Wathil bin Himyar recognised the authority of Cyrus the Great over Oman in 536 BCE.
The Omani Kingdom was subdued by the Sasanian Empire's forces under Vahrez during the Aksumite–Persian wars. The 4,000-strong Sasanian garrison was headquartered at Jamsetjerd/Jamshedgird (modern Jebel Gharabeh, also known as Felej al-Sook)