The following outline is an overview of and topical guide to Thailand.
Thailand is a country at the centre of the Indochina peninsula in Southeast Asia, known as Siam until 1939. As of 2023[update] Thailand is a monarchy governed by a military junta that took power in May 2014. Although a constitutional system was established in 1932, the monarchy and military have continued to intervene periodically in politics. Thailand experienced rapid economic growth between 1985 and 1996, becoming a newly industrialized country and a major exporter. Manufacturing, agriculture, and tourism are leading sectors of the economy. Among the ten ASEAN countries, Thailand ranks second in quality of life and the country's HDI had been rated as "high". Its large population and growing economic influence have made it a middle power in the region and around the world.
Tai groups and people who speak Tai are the majority population in Thailand, with Tai-Lao speakers making up 25% of the population. The heartland of Thailand is the Chao Phraya River Valley, where the original inhabitants were Mon-speaking people. The Mon people are now a minority, and the Mon language is endangered. The valley later gained control over Eastern Thailand as well, known as the Korat Plateau. This area is not mountainous, as its name would suggest. Although the people of this area have largely adopted Thai culture, there is still a mixture of many Tai-Kadai, Khmer, and Cambodian speakers. Northern Thailand is mountainous and holds many minority groups: "hill tribes." Another mountainous region is the Malay Peninsula, where the 3rd largest population of Malay people live. Many in this area speak Mon-related languages.
Thailand is divided into 76 provinces (จังหวัด, changwat) and the metropolitan municipality Bangkok (กรุงเทพมหานคร, Krung Thep Maha Nakhon).
Map showing the 76 provinces and 1 metropolitan municipality (Bangkok) of ThailandA chedi built in Srivijaya period, Amphoe Chaiya, Surat Thani Province
Northern
Chiang Mai (เชียงใหม่)
Chiang Rai (เชียงราย)
Lampang (ลำปาง)
Lamphun (ลำพูน)
Mae Hong Son (แม่ฮ่องสอน)
Nan (น่าน)
Phayao (พะเยา)
Phrae (แพร่)
Uttaradit (อุตรดิตถ์)
West
Kanchanaburi (กาญจนบุรี)
Phetchaburi (เพชรบุรี)
Prachuap Khiri Khan (ประจวบคีรีขันธ์)
Ratchaburi (ราชบุรี)
Tak (ตาก)
Isan
Amnat Charoen (อำนาจเจริญ)
Bueng Kan (บึงกาฬ)
Buri Ram (บุรีรัมย์)
Chaiyaphum (ชัยภูมิ)
Kalasin (กาฬสินธุ์)
Khon Kaen (ขอนแก่น)
Loei (เลย)
Maha Sarakham (มหาสารคาม)
Mukdahan (มุกดาหาร)
Nakhon Phanom (นครพนม)
Nakhon Ratchasima (นครราชสีมา)
Nong Bua Lamphu (หนองบัวลำภู)
Nong Khai (หนองคาย)
Roi Et (ร้อยเอ็ด)
Sakon Nakhon (สกลนคร)
Si Sa Ket (ศรีสะเกษ)
Surin (สุรินทร์)
Ubon Ratchathani (อุบลราชธานี)
Udon Thani (อุดรธานี)
Yasothon (ยโสธร)
Central
Ang Thong (อ่างทอง)
Phra Nakhon Si Ayutthaya Province (พระนครศรีอยุธยา)
Chiang Rai city clock tower in the middle of Amphoe Meaung Chiang Rai
Altogether Thailand has 877 districts (อำเภอ; Amphoe), not including the 50 districts of Bangkok which are called khet (เขต) since the Bangkok administration reform in 1972.
Wat Chaiwatthanaram ruins from Ayutthaya periodA Leela Buddha statue in the ruins of Wat Saphan Hin in Sukhothai Historical Park, built in Sukhothai period