Thailand
Capital: Bangkok · South-Eastern Asia
Thailand, officially the Kingdom of Thailand, and formerly known as Siam, is a country located in Mainland Southeast Asia.
Photo: Diego Delso, CC BY-SA 3.0 · source
Boy under waterfall in Phu Sang National Park, Thailand
Photo: Khunkay, CC BY-SA 3.0 · source
Morning at Tham Sa Koen National Park. This is in Phayao province and Nan province of Northern Thailand.
Photo: BerryJ, CC BY-SA 4.0 · source
Small wooden rowing boat chained to a mooring post on the shores of Phayao Lake (Kwan Phayao, Thai: กว๊านพะเยา) close to Wat Si Khom Kham, around 1km northwest of Phayao…
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Archaeological evidence indicates that humans have inhabited the area for at least 40,000 years. Indigenous ethnic groups include the Mon, Khmer, and Malay people. The Tai people are believed to have originated from the Điện Biên Phủ region since the 5th century and began migrating into the territory of modern Thailand between the 8th and 10th centuries. During the classical historical period, major kingdoms such as Sukhothai, Lan Na, and Ayutthaya were established.
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Long-tail boat cruising in Raylay Bay. The beach on background is Tonsai beach.
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The Mekong River on Thai-Lao border, about 2 kilometers downstream from Fourth Thai–Lao Friendship Bridge
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Etymology
Before 1939, Thailand was known internationally as Siam. The word Thai (ไทย) is traditionally interpreted to mean 'free man' in the Thai language, distinguishing the Thai from serfs in historical society. However, other scholars suggest the term originally meant simply 'people' or 'human being', noting its historical use in rural areas.
Thais typically refer to their country using the polite form prathet Thai (Thai: ประเทศไทย) or the more colloquial mueang Thai (Thai: เมืองไทย). The word mueang, which archaically referred to a city-state, is commonly used to denote a city or region.
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The head of a sandstone Buddha statue nestled in the tree roots beside the minor chapels of Wat Maha That, Phra Nakhon Si Ayutthaya Province , Thailand . The temple is…
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Chiang Mai, Thailand: Buddhist Manuscript Library and Museum
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Image of Lepadid (Gooseneck Barnacles Lepas anatifera ) in Bophut, Koh Samui, Thailand.
Photo: Tom Page , Aurevilly, Public domain · source
History
Continuous human habitation in present-day Thailand dates back at least 20,000 years. Agriculture emerged with rice cultivation around 2000 BCE, alongside participation in the Maritime Jade Road, a trading network connecting Southeast Asia from 2000 BCE to 1000 CE. The Ban Chiang site in northeast Thailand is the earliest known centre of copper and bronze production in Southeast Asia, dating between 2000 and 1000 BCE. Iron working appeared around 500 BCE.
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Wat Chai Watthanaram , Ayutthaya Historical Park , central Thailand .
Photo: Evilarry, Public domain · source
Smith’s Snorkel Cyclophorus; diameter 2.8 cm; Originating from Thailand; Shell of own collection, therefore not geocoded.
Photo: H. Zell, CC BY-SA 3.0 · source
Geography
Totalling 513,120 square kilometres (198,120 sq mi), Thailand is the 50th-largest country by total area. Thailand comprises several distinct geographic regions, partly corresponding to the provincial groups. The north of the country is the mountainous area of the Thai highlands, with the highest point being Doi Inthanon in the Thanon Thong Chai Range at 2,565 metres (8,415 ft) above sea level. The northeast, Isan, consists of the Khorat Plateau, bordered to the east by the Mekong River.
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Tree-lined walkway leading to the north facade of the city pillar ( lak mueang ) shrine in the city centre of Phayao, northern Thailand.
Photo: BigDom, CC BY-SA 4.0 · source
Politics and government
Prior to 1932, Thai kings were feudal or absolute monarchs. During the Sukhothai Kingdom, the king was seen as a dharmaraja, or a 'king who rules in accordance with dharma'. The system of government was a network of tributaries ruled by local lords. Modern absolute monarchy and statehood were established by King Chulalongkorn when he transformed the decentralised protectorate system into a unitary state. On 24 June 1932, the Khana Ratsadon (People's Party) carried out a bloodless revolution that marked the beginning of a constitutional monarchy.
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Phi Phi Lay Island, Thailand
Photo: Diego Delso, CC BY-SA 3.0 · source
This is a photo of a monument in Thailand identified by the ID
Photo: Khunkay, CC BY-SA 4.0 · source
Foggy morning at Thung Salaeng Luang National Park
Photo: BerryJ, CC BY-SA 4.0 · source
Economy
The economy of Thailand is heavily export-dependent, with exports accounting for more than two-thirds of gross domestic product (GDP). Thailand exports over US$105 billion worth of goods and services annually. Major exports include cars, computers, electrical appliances, rice, textiles and footwear, fishery products, rubber, and jewellery.
Thailand is an emerging economy and is considered a newly industrialised country. Thailand had a 2026 GDP of US$1.964 trillion (on a purchasing power parity basis). It is the second-largest economy in Southeast Asia after Indonesia, and ranks midway in the region's wealth spread as the fourth-richest nation by GDP per capita.
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Hat Noppharat Thara beach in Ao Nang, Krabi, Thailand.
Photo: kallerna, CC BY-SA 3.0 · source
Ko Tapu (Tapu Island) is a 20 m tall islet in front of the Khao Phing Kan islands, in the Phang Nga Bay , in Thailand. The island belongs to the Phang Nga National Park…
Photo: Diego Delso, CC BY-SA 3.0 · source
Infrastructure
The State Railway of Thailand (SRT) operates all national rail lines. Krung Thep Aphiwat Central Terminal and Bangkok (Hua Lamphong) are the main termini for intercity routes, while Phahonyothin and the Lat Krabang Inland Container Depot (ICD) are the primary freight terminals. As of 2025, the SRT had 4,507 km (2,801 mi) of track, all of it metre gauge. Nearly all of it is single-track (2,702.1 km (1,679.0 mi)), although key sections around Bangkok are double-tracked (1,234.9 km (767.3 mi)) or triple-tracked (107 km (66 mi)), with expansion plans underway.
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This is a photo of a monument in Thailand identified by the ID
Photo: BerryJ, CC BY-SA 4.0 · source
A long-tail boat in Chicken Island (Ko Kai), Krabi, Thailand.
Photo: kallerna, CC BY-SA 3.0 · source
Demographics
Thailand had a population of 65.95 million in 2025. There were 64,953,661 Thai nationals and 997,549 non-Thai residents. Thailand's first census in 1909 found the population to be 8.2 million. The population is largely rural, concentrated in the rice-growing areas of the central, northeastern, and northern regions. About 44.2% of the population lived in urban areas as of 2010, a gradual increase from 29.4% in the 1990 census and 31.1% in the 2000 census.
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Culture
Thai culture and traditions incorporate influences from India, China, Cambodia, and the rest of Southeast Asia. Thailand's national religion, Theravada Buddhism, is central to modern Thai identity. Thai Buddhism has evolved over millennia from the Mon kingdom of Dvaravati, and today incorporates regional beliefs rooted in Hinduism, animism, and ancestor worship. The official calendar is based on the Eastern version of the Buddhist Era (BE).
The ancient Thai identity originates from Tai-speaking groups who migrated from southern China to Southeast Asia between the 6th and 11th centuries.
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