Singapore, officially the Republic of Singapore, is a Southeast Asian city-state off the southern tip of the Malay Peninsula, 137 kilometres (85 mi) north of the equator. An island country made up of 63 islands, it is separated from Malaysia by the Straits of Johor to its north and from Indonesia's Riau Islands by the Singapore Strait to its south. Singapore is highly urbanised but almost half of the country is covered by greenery. More land is being created for development through land reclamation.

Singapore had been a part of various local empires since it was first inhabited in the second century AD. Modern Singapore was founded as a trading post of the East India Company by Sir Stamford Raffles in 1819 with permission from the Sultanate of Johor. The British obtained full sovereignty over the island in 1824 and Singapore became one of the British Straits Settlements in 1826. Singapore was occupied by the Japanese in World War II and reverted to British rule after the war. It became internally self-governing in 1959. Singapore united with other former British territories to form Malaysia in 1963 and became a fully independent state two years later after separation from Malaysia. Since then it has had a massive increase in wealth, and is one of the Four Asian Tigers. The economy depends heavily on the industry and service sectors. Singapore is a world leader in several areas: It is the world's fifth-leading financial centre, the world's second-biggest casino gambling market, and the world's third-largest oil refining centre. The port of Singapore is one of the five busiest ports in the world, most notable for being the busiest transshipment port in the world. The country is home to more US dollar millionaire households per capita than any other country. The World Bank notes Singapore as the easiest place in the world to do business. The country has the world's third highest GDP PPP per capita of US$59,936, making Singapore one of the world's wealthiest countries.

Singapore is a parliamentary republic with a Westminster system of unicameral parliamentary government. The People's Action Party (PAP) has won every election since the British grant of internal self-government in 1959. The legal system of Singapore has its foundations in the English common law system, but modifications have been made to it over the years, such as the removal of trial by jury. The PAP's popular image is that of a strong, experienced and highly qualified government, backed by a skilled Civil Service and an education system with an emphasis on achievement and meritocracy; but it is perceived by some voters, opposition critics and international observers as being authoritarian and too restrictive on individual freedom.

Some 5 million people live in Singapore, of whom 2.91 million were born locally. Most are of Chinese, Malay or Indian descent. There are four official languages: English, Chinese, Malay and Tamil. One of the five founding members of the Association of South East Asian Nations, Singapore also hosts the APEC Secretariat, and is a member of the East Asia Summit, the Non-Aligned Movement, and the Commonwealth.