Malaysia (Malaysian pronunciation: [məlejsiə]) is a federal constitutional monarchy located in Southeast Asia. It consists of thirteen states and three federal territories and has a total landmass of 329,847 square kilometres (127,350 sq mi) separated by the South China Sea into two similarly sized regions, Peninsular Malaysia and East Malaysia (Malaysian Borneo). Peninsular Malaysia shares a land and maritime border with Thailand and maritime borders with Singapore, Vietnam, and Indonesia. East Malaysia shares land and maritime borders with Brunei and Indonesia and a maritime border with the Philippines. The capital city is Kuala Lumpur, while Putrajaya is the seat of the federal government. By 2015, with a population of over 30 million, Malaysia became the 43rd most populous country in the world. The southernmost point of continental Eurasia, Tanjung Piai, is in Malaysia, located in the tropics. It is one of 17 megadiverse countries on earth, with large numbers of endemic species.
Malaysia has its origins in the Malay kingdoms present in the area which, from the 18th century, became subject to the British Empire. The first British territories were known as the Straits Settlements, whose establishment was followed by the Malay kingdoms becoming British protectorates. The territories on Peninsular Malaysia were first unified as the Malayan Union in 1946. Malaya was restructured as the Federation of Malaya in 1948, and achieved independence on 31 August 1957. Malaya united with North Borneo, Sarawak, and Singapore on 16 September 1963. Less than two years later in 1965, Singapore was expelled from the federation.
The country is multi-ethnic and multi-cultural, which plays a large role in politics. The constitution declares Islam the state religion while allowing freedom of religion for non-Muslims. The government system is closely modelled on the Westminster parliamentary system and the legal system is based on common law. The head of state is the king, known as the Yang di-Pertuan Agong. He is an elected monarch chosen from the hereditary rulers of the nine Malay states every five years. The head of government is the prime minister.