Eastern Thailand is a region of Thailand bordering Cambodia on the east and central Thailand on the west.
Eastern Thailand lies between the Sankamphaeng Range, which forms a natural border with the Khorat Plateau to the north and the Gulf of Thailand to the south. The geography of the region is characterised by short mountain ranges alternating with small basins of short rivers which drain into the Gulf of Thailand.
Fruit is a major component of agriculture in the area, and tourism plays a strong part in the economy. The region's coastal location has helped promote eastern seaboard industrial development, a major factor in the economy of the region.
Islands off Eastern Thailand's coast include Ko Sichang, Ko Lan, Ko Samet, and Ko Chang.
According to the six geographical regions established by the National Research Council of Thailand, the eastern region includes the following provinces:
Coordinates: 13°27′N 101°36′E / 13.450°N 101.600°E