The Kra Isthmus ( th, คอคอดกระ, ) in Thailand is the narrowest part of the
Malay Peninsula The Malay Peninsula (Malay language, Malay: ''Semenanjung Tanah Melayu'') is a peninsula in Southeast Asia. The land mass runs approximately north–south and, at its terminus, is the southernmost point of the Asian mainland. The area contains Pe ...
. The western part of the isthmus belongs to Ranong Province and the eastern part to Chumphon Province, both in Southern Thailand. The isthmus is bordered to the west by the Andaman Sea and to the east by the Gulf of Thailand. The Kra Isthmus marks the boundary between two sections of the mountain chain which runs from
Tibet Tibet (; ; ) is a region in East Asia covering much of the Tibetan Plateau spanning about . It is the traditional homeland of the Tibetan people as well as some other ethnic groups such as Monpa people, Monpa, Tamang, Qiang people, Qiang, S ...
through the Malay peninsula. The southern part is the Phuket Range, which is a continuation of the Tenasserim Hills, extending further northwards for over beyond the Three Pagodas Pass. The Kra Isthmus is in the Tenasserim-South Thailand semi-evergreen rain forests ecoregion. Dipterocarps are the dominant trees in the ecoregion.

Pacific War

On 8 December 1941 local time, the Imperial Japanese army landed in Songkhla, Japanese Invasion of Thailand, invading Thailand. Because of the International Date Line, this actually occurred hours before the 7 December (Hawaii time) attack on Pearl Harbor, making it the first major action of the Pacific War. The Japanese forces then moved south towards Perlis and Penang as part of the Battle of Malaya, Malayan campaign, which culminated in the Battle of Singapore, capture of Singapore.

Kra Canal

The Thai Canal is a proposal to join the Gulf of Thailand with the Andaman Sea. It was originally envisioned as crossing the isthmus.


{{Authority control Kra Isthmus, Isthmuses of Asia Landforms of Thailand Malay Peninsula Andaman Sea Gulf of Thailand Southern Thailand Tanintharyi Region Landforms of Myanmar