Macau or Macao is a special administrative region of the People's Republic of China. With a population of about 710,000 people and a land area of 32.9 km (12.7 sq mi), it is the most densely populated region in the world.

Formerly a Portuguese colony, the territory of Portuguese Macau was first leased to Portugal by the Ming dynasty as a trading post in 1557. Portugal paid an annual rent and administered the territory under Chinese sovereignty until 1887. Portugal later gained perpetual colonial rights in the Sino-Portuguese Treaty of Peking. The colony remained under Portuguese rule until the 1999 handover to China. Macau is a special administrative region of China, which maintains separate governing and economic systems from those of mainland China under the principle of "one country, two systems". The unique blend of Portuguese and Chinese architecture in the city's historic centre has resulted in its inscription on the UNESCO World Heritage List in 2005.

Originally a sparsely populated collection of coastal islands, Macau, often referred to as the "Las Vegas of the East", since the late 20th century has become a major resort city and a top destination for gambling tourism. Its gambling industry is seven times larger than that of Las Vegas. The city has one of the highest GDPs per capita and GDPs per capita by purchasing power parity in the world.

It has a very high Human Development Index of 0.925, as calculated by the Government of Macau, and the fourth-highest life expectancy in the world. The territory is highly urbanised, holding the status of the most densely populated territory on Earth; two-thirds of the total land area is built on land reclaimed from the sea.

Macau
"Macau" in Traditional (top) and Simplified (bottom) Chinese characters
Chinese name
Traditional Chinese	澳門
Simplified Chinese	澳门
Literal meaning	Bay Gate
Transcriptions Standard Mandarin Hanyu Pinyin Àomén Bopomofo ㄠˋ ㄇㄣˊ Wade–Giles Ao-men Tongyong Pinyin Ào-mén IPA [âʊ.mə̌n] other Mandarin Xiao'erjing اَوْمٍ Wu Romanization aumen Hakka Romanization Au mun Yue: Cantonese Yale Romanization Oumún Jyutping ou3 mun2 Canton Romanization Oumun IPA [ɔw˧.mun˧˥] Southern Min Hokkien POJ Ò-mn̂g Eastern Min Fuzhou BUC Ó̤-muòng
Macau Special Administrative Region
Traditional Chinese	澳門特別行政區 (or 澳門特區)
Simplified Chinese	澳门特别行政区 (or 澳门特区)
Transcriptions Standard Mandarin Hanyu Pinyin Àomén Tèbié Xíngzhèngqū (Àomén Tèqū) Bopomofo ㄠˋ ㄇㄣˊ ㄊㄜˋ ㄅㄧㄝˊ ㄒㄧㄥˊ ㄓㄥˋ ㄑㄩ (ㄠˋ ㄇㄣˊ ㄊㄜˋ ㄑㄩ) Wade–Giles Ao-men Tʻe-pieh Hsing-cheng-chʻü (Ao-men Tʻe Chʻü) Tongyong Pinyin Ào-mén Tè-bié Síng-jhèng-cyu (Ào-mén Tè-cyu) IPA [âʊ.mə̌n tʰɤ̂.pjě ɕǐŋ.ʈʂə̂ŋ.tɕʰý] ([âʊ.mə̌n tʰɤ̂.tɕʰý]) Wu Romanization aumen dehbih ghantsenchiu Hakka Romanization Aumun Tetpiet hangzinki (Aumun Tetki) Yue: Cantonese Yale Romanization Oumún Dahkbiht Hàhngjing Keūi Jyutping ou3 mun2 dak6 bit6 hang4 zing3 keoi1 Canton Romanization Oumun> Degbid Hengjing Kêu IPA [ɔw˧.mun˧˥ tɐk̚˨.pit̚ hɐŋ˩.tsɪŋ˧ kʰɵɥ˥] Southern Min Hokkien POJ Ò-mn̂g Te̍k-pia̍t Hêng-chèng-khu
Portuguese name
Portuguese	Região Administrativa Especial de Macau [ʁɨʒiˈɐ̃w ɐðminiʃtɾɐˈtivɐ ɨʃpɨsiˈal dɨ mɐˈkaw]

The first known written record of the name "Macau", rendered as "A Ma Gang" (亞/阿-媽/馬-港), is found in a letter dated 20 November 1555. The local inhabitants believed that the sea goddess Matsu (alternatively called A-Ma) had blessed and protected the harbour and referred to the waters around A-Ma Temple by her name. When Portuguese explorers first arrived in the area and asked for the place name, the locals thought they were asking about the temple and told them it was "Ma Kok" (媽閣). The earliest Portuguese spelling for this was Amaquão. Multiple variations were used until Amacão / Amacao and Macão / Macao became common during the 17th century.

The 1911 reform of Portuguese orthography standardised the spelling as Macau; however, the use of Macao persisted in English and other European languages.

The Macau Peninsula had many names in Chinese, including Jing'ao (井澳/鏡澳), Haojing (濠鏡), and Haojing'ao (濠鏡澳). The islands Taipa, Coloane, and Hengqin were collectively called Shizimen (十字門). These names would later become Ou mún (澳門), Aomen in Mandarin and translating as "bay gate" or "port gate", to refer to the whole territory.

During the Qin dynasty (221–206 BC), the region was under the jurisdiction of Panyu County, Nanhai Prefecture of the province of Guangdong. The region is first known to have been settled during the Han dynasty. It was administratively part of Dongguan Prefecture in the Jin dynasty (266–420 AD), and alternated under the control of Nanhai and Dongguan in later dynasties. In 1152, during the Song dynasty (960–1279 AD), it was under the jurisdiction of the new Xiangshan County. In 1277, approximately 50,000 refugees fleeing the Mongol conquest of China settled in the coastal area.

The first European visitor to reach China by sea was the explorer Jorge Álvares, who arrived in 1513. Merchants first established a trading post in Hong Kong waters at Tamão, present-day Tuen Mun, beginning regular trade with nearby settlements in southern China. Military clashes between the Ming and Portuguese navies followed the expulsion of the Tamão traders in 1521. Despite the trade ban, Portuguese merchants continued to attempt to settle on other parts of the Pearl River estuary, finally settling on Macau.

In their first attempts at obtaining trading posts by force, the Portuguese were defeated by the Ming Chinese at the Battle of Tunmen in Tamão (or Tuen Mun) in 1521, where the Portuguese lost two ships. They were also defeated at the Battle of Sincouwaan around Lantau Island, where the Portuguese lost two more ships. Other defeats include Shuangyu in 1548, where several Portuguese were captured, and near Dongshan County in 1549, where two Portuguese junks and Galeote Pereira were captured. During these battles the Ming Chinese captured weapons from the defeated Portuguese which they reverse engineered and mass-produced in China. These included the matchlock musket arquebuses, which they named bird guns, and breech-loading swivel guns, which they named as Folangji (Frankish) cannon because the Portuguese were known to the Chinese under the name of Franks at this time.

The Portuguese later returned to China peacefully and presented themselves under the name Portuguese instead of Franks in the Luso-Chinese agreement (1554). They rented Macau as a trading post from China by paying annual lease of hundreds of silver taels to Ming China. Luso-Canton trade relations were formally reestablished in 1554, and Portugal soon after acquired a permanent lease for Macau in 1557, agreeing to pay 500 taels of silver as annual land rent.

Macau became a stopover on the sea lane that connected Japan with the wider world. The Portuguese could avoid the Pearl River and inched towards Quanzhou and Ningbo. But as they failed to establish trading relationships with the Chinese, the Portuguese focused on trade with Japan. The Roman Catholic Diocese of Macau was created in 1576, and by 1583 the Municipal Council of Macau had been established to handle municipal affairs for the growing settlement. Macau was at the peak of its prosperity as a major warehouse during the late 16th century, providing a crucial connection in exporting Chinese silk to Japan during the Nanban trade period.

Although the Portuguese were initially prohibited from fortifying Macau or stockpiling weapons, the Fortaleza do Monte was constructed in response to frequent Dutch naval incursions. The Dutch attempted to take the city in the 1622 Battle of Macau, but were repelled successfully by the Portuguese. Macau entered a period of decline in the 1640s following a series of catastrophic events for the burgeoning colony: Portuguese access to trade routes was irreparably severed when Japan halted trade in 1639, and after the Portuguese Restoration War of 1640, Portuguese Malacca fell to the Dutch in 1641.

Maritime trade with China was banned in 1644 following the Qing conquest under the Haijin policies. It was limited only to Macau on a lesser scale while the new dynasty focused on eliminating surviving Ming loyalists. While the Kangxi Emperor lifted the prohibition in 1684, China again restricted trade decades later under the Canton System in 1757. Foreign ships were required to stop first at Macau before further proceeding to Canton. Qing authorities exercised a much greater role in governing the territory during this period; Chinese residents were subject to Qing courts and new construction had to be approved by the resident mandarin beginning in the 1740s. As the opium trade became more lucrative during the 18th century, Macau again became an important stopping point en route to China.

Following the First Opium War and the establishment of Hong Kong by the British, Macau lost its role as a major port. Firecracker and incense production, as well as tea and tobacco processing, were vital industries in the colony during this time. Portugal was able to capitalise on China's postwar weakness and assert its sovereignty; the Governor of Macau began refusing to pay China annual land rent for the colony in the 1840s, and annexed Taipa and Coloane, in 1851 and 1864, respectively. Portugal also occupied nearby Lapa and Montanha. But these were returned to China by 1887, when perpetual occupation rights over Macau were formalised in the Sino-Portuguese Treaty of Peking. This agreement also prohibited Portugal from ceding Macau without Chinese approval. Despite occasional conflict between Cantonese authorities and the colonial government, Macau's status remained unchanged through the republican revolutions of both Portugal in 1910 and China in 1911. The Kuomintang further affirmed Portuguese jurisdiction in Macau when the Treaty of Peking was renegotiated in 1928.

During the Second World War, the Empire of Japan did not occupy the colony and generally respected Portuguese neutrality in Macau. However, after Japanese troops captured a British cargo ship in Macau waters in 1943, Japan installed a group of government "advisors" as an alternative to military occupation. The territory largely avoided military action during the war except in 1945, when the United States ordered air raids on Macau after learning that the colonial government was preparing to sell aviation fuel to Japan. In 1950 the US paid Portugal more than US$20 million in compensation for the damage during the war.

Refugees from mainland China swelled the population as they fled from the Chinese Civil War. Access to a large workforce enabled Macau's economy to grow as the colony expanded its clothing and textiles manufacturing industry, developed its tourism industry, and legalised casino gaming. However, at the height of the Cultural Revolution, residents dissatisfied with the colonial administration rioted in the 1966 12-3 incident, in which 8 people were killed and more than 200 were injured. Portugal lost full control over the colony afterwards, and agreed to cooperate with the Chinese Communist Party in exchange for continued administration of Macau.

Following the 1974 Carnation Revolution, Portugal formally relinquished Macau as an overseas province and acknowledged it as a "Chinese territory under Portuguese administration". After China first concluded arrangements on Hong Kong's future with the United Kingdom, it entered negotiations with Portugal over Macau in 1986.

These concluded with the signing of the 1987 Joint Declaration on the Question of Macau, in which Portugal agreed the handover of the colony in 1999 and China guaranteed Macau's political and economic systems for 50 years after the handover. In the waning years of colonial rule, Macau rapidly urbanised and constructed large-scale infrastructure projects, including the Macau International Airport and a new container port. The handover of Macau was at midnight on 20 December 1999, after 442 years of Portuguese rule.

Following the handover, Macau liberalised its casino industry (which previously operated under a government-licensed monopoly) to allow foreign investors, starting a new period of economic development. The regional economy grew by a double-digit annual growth rate from 2002 to 2014, making Macau one of the richest economies in the world on a per capita basis. Political debates have centred on the region's jurisdictional independence and the central government's adherence of "one country, two systems". While issues such as national security legislation have been controversial, Macanese residents generally have high levels of trust in the government. Kwong and Wong explain this by comparing Macau to Hong Kong: "The case of Macau shows that the very small size of a 'microstate' helps central authorities to exercise political control, stifle political pluralism, and monopolize opinions, all of which strengthen regime persistence."

Macau is a special administrative region of China, with executive, legislative, and judicial powers devolved from the national government. The Sino-Portuguese Joint Declaration provided for economic and administrative continuity through the handover, resulting in an executive-led governing system largely inherited from the territory's history as a Portuguese colony. Under these terms and the "one country, two systems" principle, the Basic Law of Macao is the regional constitution. Because negotiations for the Joint Declaration and Basic Law began after transitional arrangements for Hong Kong were made, Macau's structure of government is very similar to Hong Kong's.

The regional government is composed of three branches:

• Executive: The Chief Executive is responsible for enforcing regional law, can force reconsideration of legislation, and appoints Executive Council members, a portion of the legislature, and principal officials. Acting with the Executive Council, the Chief Executive can propose new bills, issue subordinate legislation, and has authority to dissolve the legislature.
• Legislature: The unicameral Legislative Assembly enacts regional law, approves budgets, and has the power to impeach a sitting Chief Executive.
• Judiciary: The Court of Final Appeal and lower courts, whose judges are appointed by the Chief Executive on the advice of a recommendation commission, interpret laws and overturn those inconsistent with the Basic Law.

The Chief Executive is the head of government, and serves for a maximum of two five-year terms. The State Council (led by the Premier of China) appoints the Chief Executive after nomination by the Election Committee, which is composed of 400 business, community, and government leaders.

The Legislative Assembly has 33 members, each serving a four-year term: 14 are directly elected, 12 indirectly elected, and 7 appointed by the Chief Executive. Indirectly elected assemblymen are selected from limited electorates representing sectors of the economy or special interest groups. All directly elected members are chosen with proportional representation.

Twelve political parties had representatives elected to the Legislative Assembly in the 2017 election. These parties have aligned themselves into two ideological groups: the pro-establishment (the current government) and pro-democracy camps. Macau is represented in the National People's Congress by 12 deputies chosen through an electoral college, and 29 delegates in the Chinese People's Political Consultative Conference appointed by the central government.

Macau has generally congenial relations with China's central government.

Chinese national law does not generally apply in the region, and Macau is treated as a separate jurisdiction. Its judicial system is based on Portuguese civil law, continuing the legal tradition established during colonial rule. Interpretative and amending power over the Basic Law and jurisdiction over acts of state lie with the central authority, however, making regional courts ultimately subordinate to the mainland's socialist civil law system. Decisions made by the Standing Committee of the National People's Congress can also override territorial judicial processes. In 2021, after similar actions were taken in Hong Kong following the protests associated with the Anti-Extradition Law Amendment Bill Movement, 21 candidates running for office in the territorial elections were disqualified as a result of allegedly failing to support the Basic Law, although no specific violations were noted by the territory's electoral commission.

The territory's jurisdictional independence is most apparent in its immigration and taxation policies. The Identification Department issues passports for permanent residents which differ from those issued by the mainland or Hong Kong, and the region maintains a regulated border with the rest of the country. All travellers between Macau and China and Hong Kong must pass border controls, regardless of nationality. Chinese citizens resident in mainland China do not have the right of abode in Macau and are subject to immigration controls. Public finances are handled separately from the national government, and taxes levied in Macau do not fund the central authority.

The Macao Garrison is responsible for the region's defence. Although the Chairman of the Central Military Commission is supreme commander of the armed forces, the regional government may request assistance from the garrison. Macau residents are not required to perform military service and the law also has no provision for local enlistment, so its defence force is composed entirely of nonresidents.

The State Council and the Ministry of Foreign Affairs handle diplomatic matters, but Macau retains the ability to maintain separate economic and cultural relations with foreign nations. The territory negotiates its own trade agreements and actively participates in supranational organisations, including agencies of the World Trade Organization and United Nations. The regional government maintains trade offices in Greater China and other nations.

Public political demonstrations in Macau are generally rare.

Macau is not a member of the Community of Portuguese Language Countries, despite Portuguese being one of its official languages. This is due to it not being a sovereign nation, but a subnational division of China. In 2006, during the II Ministerial meeting between China and Portuguese Speaking Countries, the CPLP Executive Secretary and Deputy ambassador Tadeu Soares invited the Chief Executive of the Government of the Macau Special Administrative Region, Edmund Ho, to request the Associate Observer status for Macau. The Government of Macau has yet to make this request. In 2016, Murade Murargy, then executive secretary of CPLP said in an interview that Macau's membership is a complicated question, since like the Galicia region in Spain, it is not an independent country, but only a part of China. However, the Instituto Internacional de Macau (澳門國際研究所) and the University of São José are Consultative Observers of the CPLP.

The territory is divided into seven parishes. Cotai, a major area developed on reclaimed land between Taipa and Coloane, and areas of the Macau New Urban Zone do not have defined parishes. Historically, the parishes belonged to one of two municipalities (the Municipality of Macau or the Municipality of Ilhas) that were responsible for administering municipal services. The municipalities were abolished in 2001 and superseded by the Civic and Municipal Affairs Bureau in providing local services.

Parish/Area	Chinese	Area (km)
Parishes
Nossa Senhora de Fátima	花地瑪堂區	3.2
Santo António	花王堂區	1.1
São Lázaro	望德堂區	0.6
São Lourenço	風順堂區	1.0
Sé (including New District Zone B)	大堂區 (包括新城B區)	3.4
Nossa Senhora do Carmo (including New District Zone E)	嘉模堂區 (包括新城E區)	7.9
São Francisco Xavier	聖方濟各堂區	7.6
Other areas
Cotai	路氹填海區	6.0
New District Zone A	新城A區	1.4
HZMB Zhuhai-Macau Port	港珠澳大橋珠澳口岸	0.7
University of Macau (Hengqin campus)	澳門大學 (橫琴校區)	1.0

Macau is located on China's southern coast, 60 km (37 mi) west of Hong Kong, on the western side of the Pearl River estuary. It is surrounded by the South China Sea in the east and south, and neighbours the Guangdong city of Zhuhai to the west and north. The territory consists of Macau Peninsula, Taipa, and Coloane. A 1 km (0.39 sq mi) parcel of land in neighbouring Hengqin island that hosts the University of Macau also falls under the regional government's jurisdiction. The territory's highest point is Coloane Alto, 170.6 m (560 ft) above sea level.

Urban development is concentrated on peninsular Macau, where most of the population lives. The peninsula was originally a separate island with hilly terrain, which gradually became a tombolo as a connecting sandbar formed over time. Both natural sedimentation and land reclamation expanded the area enough to support urban growth. Macau has tripled its land area in the last century, increasing from 10.28 km (3.97 sq mi) in the late 19th century to 32.9 km (12.7 sq mi) in 2018.

Cotai, the area of reclaimed land connecting Taipa and Coloane, contains many of the newer casinos and resorts established after 1999. The region's jurisdiction over the surrounding sea was greatly expanded in 2015, when it was granted an additional 85 km (33 sq mi) of maritime territory by the State Council. Further reclamation is underway to develop parts of the Macau New Urban Zone. The territory also has control over part of an artificial island to maintain a border checkpoint for the Hong Kong–Zhuhai–Macau Bridge.

Despite being located south of the Tropic of Cancer, Macau has a humid subtropical climate (Köppen Cwa), characteristic of southern China. The territory is dual season dominant – summer (May to September) and winter (December to February) are the longest seasons, while spring (March and April) and autumn (October and November) are relatively brief periods. The summer monsoon brings warm and humid air from the sea, with the most frequent rainfall occurring during the season. Typhoons also occur most often then, bringing significant spikes in rainfall. During the winter, northern winds from the continent bring dry air and much less rainfall. The highest and lowest temperatures recorded at the Macao Meteorological and Geophysical Bureau are 38.9 °C (102.0 °F) on both 2 July 1930 and 6 July 1930 and −1.8 °C (28.8 °F) on 26 January 1948.