Peninsular Malaysia (Malay: Semenanjung Malaysia), also known as West Malaysia (formerly Malaya), is the part of Malaysia which lies on the Malay Peninsula and surrounding islands. Its area is 131,598 square kilometres (50,810 sq mi). It shares a land border with Thailand in the north. To the south is the island of Singapore.
Across the Strait of Malacca to the west lies the island of Sumatra (Indonesia). East Malaysia (on the island of Borneo) is to the east across the South China Sea. As of 2012, its population is roughly 23.5 million, Peninsular Malaysia accounts for the majority (roughly 80%) of Malaysia's population and economy.
Peninsular Malaysia consists of the following 11 states and two federal territories (starting from the North going to the South):
The name "Malaya" is derived from the name of a river of a similar name found in Sumatra.citation needed In 1963, the name Malaysia was adopted by the new federation uniting the Federation of Malaya, North Borneo, Sarawak and Singapore.citation needed At the time, the Philippines had also contemplated adopting the name.citation needed
Peninsular Malaysia is also known as West Malaysia (Malaysia Barat) or Malaya (Tanah Melayu). The term "Peninsular Malaysia" is used more often than "West Malaysia" to avoid the idea that West and East Malaysia are separate countries, and as "Malaya" obsolete due to its connotations of the British colonial era.citation needed
Nonetheless, all three terms are correct, and the older term "Malaya" can still be found in many institutional titles, e.g. the High Court of Malaya, the University of Malaya, Malayan Railway, etc., as well as in legal contexts in the phrase the "States of Malaya" (Negeri-negeri Tanah Melayu), which should not be confused with the Malay states.citation needed In current everyday usage the word Malaya is almost always used jocularly, e.g. "Gempar satu Malaya!" which roughly means "(This news) shakes the whole of Malaya!"citation needed
Until 1946, and for some time afterwards, the term Malaya included Singapore. In Singaporean law, the term "Malaya" includes Singapore, but the term "States of Malaya" does not.
The term East Coast is particularly used in Malaysia to describe the following states in Peninsular Malaysia facing the South China Sea:
The term West Coast refers informally to a collection of states in Peninsular Malaysia situated towards the western coast generally facing the Strait of Malacca, as opposed to the East Coast. Unlike the East Coast, the West Coast is partitioned further into three regions (as seen in #States and territories), including:
- The Northern Region: Perlis, Kedah, Penang and Perak.
- The Central Region: Selangor and the federal territories of Kuala Lumpur and Putrajaya.
- The Southern Region: Negeri Sembilan, Malacca and Johor.
Even though Johor has a coastline facing the South China Sea, it is not generally regarded as an East Coast state.
The distinction between West and East Malaysia (Sabah and Sarawak) is significant beyond the sphere of geography, because as well as they were separate countries when forming The Federation of Malaysia, thus having a different court structure, and the eastern states have more autonomy than the original States of Malaya, for example, maintaining restrictions on immigration from the peninsula. These rights were granted as part of Sarawak's 18-point agreement and Sabah's 20-point agreement with Federation of Malaya in forming The Federation of Malaysia.
- Peninsular Malaysia travel guide from Wikivoyage