Location and Geography. The Kingdom of Thailand has an area of 198,114 square miles (513,115 square kilometers). The country is commonly divided into four main regions and borders Burma, Laos, Cambodia, and Malaysia. The northern region is hilly, with much of its population concentrated in upland valleys and the flood plains of rivers; the dominant geographic feature is the Khorat Plateau. The southern region is a narrow isthmus with hills running down the center.
The Thai (also known as the Central Tai) live mainly in the central region, with closely related groups of Tai-speaking peoples occupying most of the remainder of the nation. Smaller ethnic groups are scattered throughout the country, especially in the north and the northeast. Bangkok has been the capital since the late eighteenth century, when it replaced the earlier capital of Ayutthaya, which was sacked by Burmese invaders in 1767. With a population of almost 10 million, Bangkok is the most important city politically and economically. About twenty smaller regional cities have populations of two hundred to three hundred thousand.
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