Malaysia 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. In 2010 the population was 28.33 million, with 22.6 million living in Peninsular Malaysia. 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, with si being added to give the new country the name Malaysia. 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 protecting freedom of religion. 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.

Since independence, Malaysia has had one of the best economic records in Asia, with GDP growing at an average 6.5% per annum for almost 50 years. The economy has traditionally been fueled by its natural resources, but is expanding in the sectors of science, tourism, commerce and medical tourism. Today, Malaysia has a newly industrialised market economy, ranked third largest in Southeast Asia and 29th largest in the world. It is a founding member of the Association of Southeast Asian Nations, the East Asia Summit and the Organisation of Islamic Cooperation, and a member of Asia-Pacific Economic Cooperation, the Commonwealth of Nations, and the Non-Aligned Movement.

Geography 
Malaysia is within the equatorial region, where a tropical rainforest climate is apparent all year round.Malaysia is the 67th largest country by total land area, with a land area of 329,847 km2 (127,355 sq mi). It has land borders with Thailand in West Malaysia, and Indonesia and Brunei in East Malaysia. It is linked to Singapore by a narrow causeway and a bridge. The country also has maritime boundaries with Vietnam and the Philippines. The land borders are defined in large part by geological features such as the Perlis River, the Golok River and the Pagalayan Canal, whilst some of the maritime boundaries are the subject of ongoing contention. Brunei forms what is almost an enclave in Malaysia, with the state of Sarawak dividing it into two parts. Malaysia is the only country with territory on both the Asian mainland and the Malay archipelago. Tanjung Piai, located in the southern state of Johor, is the southernmost tip of continental Asia. The Strait of Malacca, lying between Sumatra and Peninsular Malaysia, is one of the most important thoroughfares in global commerce, carrying 40 per cent of the world's trade.

The two parts of Malaysia, separated from each other by the South China Sea, share a largely similar landscape in that both Peninsular and East Malaysia feature coastal plains rising to hills and mountains. Peninsular Malaysia, containing 40 per cent of Malaysia's land area, extends 740 km (460 mi) from north to south, and its maximum width is 322 km (200 mi). It is divided between its east and west coasts by the Titiwangsa Mountains, rising to a peak elevation of 2,183 metres (7,162 ft) at Mount Korbu, part of a series of mountain ranges running down the centre of the peninsula.These mountains are heavily forested, and mainly composed of granite and other igneous rocks. Much of it has been eroded, creating a karst landscape. The range is the origin of some of Peninsular Malaysia's river systems. The coastal plains surrounding the peninsula reach a maximum width of 50 kilometres (31 mi), and the peninsula's coastline is nearly 1,931 km (1,200 mi) long, although harbours are only available on the western side.

East Malaysia, on the island of Borneo, has a coastline of 2,607 km (1,620 mi). It is divided between coastal regions, hills and valleys, and a mountainous interior. The Crocker Range extends northwards from Sarawak, dividing the state of Sabah. It is the location of the 4,095 m (13,435 ft) high Mount Kinabalu, the tallest mountain in Malaysia. Mount Kinabalu is protected as the Kinabalu National Park, a UNESCO World Heritage Site. The highest mountain ranges form the border between Malaysia and Indonesia. Sarawak contains the Mulu Caves, the largest cave system in the world.

Around these two halves of Malaysia are numerous islands, the largest of which is Banggi.The local climate is equatorial and characterised by the annual southwest (April to October) and northeast (October to February) monsoons. The temperature is moderated by the presence of the surrounding oceans. Humidity is usually high, and the average annual rainfall is 250 cm (98 in). The climates of the Peninsula and the East differ, as the climate on the peninsula is directly affected by wind from the mainland, as opposed to the more maritime weather of the East. Local climates can be divided into three regions, highland, lowland, and coastal. Climate change is likely to affect sea levels and rainfall, increasing flood risks and leading to droughts.

Demographics
The percentage distribution of Malaysian population by ethnic group based on 2010 census. As of the 2010 census, the population of Malaysia was 28,334,135, making it the 42nd most populated country. The population of Malaysia consists of many ethnic groups. In 2010, Malaysian citizens, of which bumiputera were 67.4%, made up 91.8% of the population. According to constitutional definition, Malays are Muslims who practice Malay customs and culture. They play a dominant role politically. Bumiputera status is also accorded to certain non-Malay indigenous peoples, including ethnic Thais, Khmers, Chams and the natives of Sabah and Sarawak. Non-Malay bumiputera make up more than half of Sarawak's population and over two thirds of Sabah's population. There also exist aboriginal groups in much smaller numbers on the peninsula, where they are collectively known as the Orang Asli. Laws over who gets bumiputera status vary between states.