The economy of Macau is a highly developed market economy. Macau's economy has remained one of the most open in the world since its handover to China in 1999. Apparel exports and gambling-related tourism are mainstays of the economy. Since Macau has little arable land and few natural resources, it depends on mainland China for most of its food, fresh water, and energy imports. Japan and Hong Kong are the main suppliers of raw materials and capital goods. Although Macau was hit hard by the 1997–98 Asian financial crisis and the early 2000s recession, its economy grew approximately 13.1% annually on average between 2001 and 2006. Macau is a full Member of the World Trade Organization. Public security has greatly improved after handover to the People's Republic of China. With the tax revenue from the profitable gambling industry, the Macau government is able to introduce the social welfare program of 15 years of free education to all Macau citizens. In 2015, Macau's economy saw a sharp decrease due to the reduced spending by visitors from Mainland China since the Anti-corruption campaign under Xi Jinping.

The handover of Macau from the Portuguese Republic to the People's Republic of China was at midnight on 20 December 1999. This event ended 442 years of Portuguese rule in the former settlement, which began in 1557.