The Kingdom of Thailand (IPA: /ˈtaɪlænd/, Thai: ราชอาณาจักรไทย Ratcha Anajak Thai (help·info), IPA: [râːtɕʰa-ʔaːnaːtɕɑ̀k-tʰɑj]) is an independent country which lies in the heart of Southeast Asia. The country is bordered to the north by Laos and Burma, to the east by Laos and Cambodia, to the south by the Gulf of Thailand and Malaysia, and to the west by the Andaman Sea and Burma. By the maritime boundary, the country is bordered to the southeast by Vietnam in the Gulf of Thailand, to the southwest by Indonesia and India in the Andaman Sea.

The capital and largest city of Thailand is Bangkok. It is also the country's centre of political, commercial, industrial and cultural activities. Bangkok is known in Thai as "Krung Thep Mahanakorn," or, more colloquially, "Krung Thep."

Thailand is the world's 50th-largest country in terms of total area, with a surface area of approximately 513,000 km² (198,000 sq mi), and the 20th most-populous country, with approximately 63 million people. About 80% of the population is ethnically Thais, 10% is of Chinese origin, and 3% is ethnically Malay. The rest belong to minority groups including Mons, Khmers, and various hill tribes. The country's official language is Thai.

Thailand is one of the most strongly Buddhist countries in the world. The national religion is Theravada Buddhism which is practiced by more than 95% of all Thais (2002).^[3] The cultures and traditions in Thailand are significantly influenced by those of India, China, Cambodia, as well as various countries in Southeast Asia. As a result, seniority plays an important role in the country's cultures. Respect for the elders is essential to Thai's spiritual practices as well as daily lifestyles. Thais are also well-known for their friendliness and hospitality, leading to the country's so called reputation as the "Land of Smiles."

Thailand is a constitutional monarchy with His Majesty King Rama IX Bhumibol Adulyadej, the ninth king of the Chakri Dynasty, as the present king. The King has reigned for more than half a century, making him the longest reigning Thai monarch. The King is recognised as the Head of State, the Head of the Armed Forces, the Upholder of the Buddhist religion, and the Upholder of all religions. Thailand is the only country in Southeast Asia that has never been ruled by a European power.