Thailand’s 77 provinces — a guide to the regions

Thailand is divided into 77 provinces — or changwat (จังหวัด) — each with its own governor, capital city, and administrative structure. Together they cover 513,120 square kilometres of mainland Southeast Asia, from the forested highlands of the far north to the coral-fringed islands of the Malay Peninsula. No two provinces are alike: one might be a landlocked agricultural plain, the next a marine national park. Understanding how they’re arranged — and what distinguishes each region — is the fastest way to plan a trip that goes beyond the obvious itinerary.

A short history of Thailand’s provincial system

Thailand’s provinces did not always look as they do today. For much of the kingdom’s history, regional power was held by semi-autonomous local rulers who paid tribute to the capital but governed largely on their own terms. The modern provincial system emerged from sweeping administrative reforms introduced by King Chulalongkorn — Rama V — in the late 19th century. Faced with colonial pressure from Britain to the west and France to the east, Chulalongkorn recognised that a unified, centrally administered state was the only way to preserve Thai sovereignty. Between 1892 and 1910 he restructured the entire country into a hierarchy of monthon (regional circles), provinces, districts, sub-districts, and villages — a framework that survives, largely intact, to this day.

The monthon layer was eventually dissolved in 1933 following a revolution that transformed Thailand from an absolute to a constitutional monarchy. What remained was the province as the primary administrative unit below the national government. Bangkok is the one exception: established as a special administrative area in 1972, it operates under its own governance structure rather than the standard provincial model, though it is almost universally counted as Thailand’s 77th province for statistical and geographic purposes.

Over the decades the number of provinces has shifted as population growth, strategic importance, and political pressure prompted the central government to carve new units from existing ones. Bueng Kan, on the Mekong River in the northeast, is the most recent addition — elevated to full provincial status in 2011, split from Nong Khai. The province count has stood at 77 ever since.

How the provinces are organised into regions

Thailand’s official statistics agency groups its 77 provinces into six geographic regions. These regions are not administrative units — no regional governor, no regional budget — but they reflect genuine cultural, climatic, and ethnic distinctions that matter on the ground. A traveller moving between regions will notice the shift in landscape, dialect, food, and architecture more clearly than any map boundary.

Northern Thailand — 9 provinces

The north is defined by mountains, river valleys, and a cooler climate that sets it apart from the rest of the country. It was the heartland of the Lanna Kingdom, an independent state that remained outside Bangkok’s direct control until the late 19th century — and its cultural distinctiveness remains. The nine provinces are Chiang Mai, Chiang Rai, Lampang, Lamphun, Mae Hong Son, Nan, Phayao, Phrae, and Uttaradit. Chiang Mai is the undisputed hub: Thailand’s second city, a base for trekking and temple visits, and a city with enough food culture, creative scene, and surrounding landscape to justify a dedicated trip. Mae Hong Son, pressed against the Myanmar border, is the most remote and the most visually striking — a small town set in a valley of morning mist, ringed by forested ridges. Nan and Phrae remain largely off the tourist map despite their remarkable temples and traditional teak architecture.

Northeastern Thailand (Isan) — 20 provinces

Isan is the largest region by area and population, occupying the vast Khorat Plateau that stretches from the Mekong River in the north and east to the Dongrak mountain range along the Cambodian border in the south. Its 20 provinces are Amnat Charoen, Bueng Kan, Buri Ram, Chaiyaphum, Kalasin, Khon Kaen, Loei, Maha Sarakham, Mukdahan, Nakhon Phanom, Nakhon Ratchasima, Nong Bua Lam Phu, Nong Khai, Roi Et, Sakon Nakhon, Si Sa Ket, Surin, Ubon Ratchathani, Udon Thani, and Yasothon. The region has its own dialect — closer to Lao than Central Thai — and a cuisine built around sticky rice, fermented fish sauce (pla ra), and grilled meats that is arguably Thailand’s most distinctive regional food tradition. It is also one of the least-visited parts of the country by international tourists, which makes it one of the most rewarding. Nakhon Ratchasima (Korat) is the regional gateway; Nong Khai and Udon Thani are the main crossings into Laos; Buri Ram is home to the Phimai Historical Park, one of the finest Khmer temple complexes outside Cambodia.

Central Thailand — 22 provinces

The central region is the political, commercial, and agricultural heart of the country. It encompasses the Chao Phraya basin — one of the most fertile river plains in Asia — as well as Bangkok and the dense ring of suburbs and satellite cities that have grown up around it. The 22 provinces include Ang Thong, Ayutthaya, Chainat, Kamphaeng Phet, Kanchanaburi, Lop Buri, Nakhon Nayok, Nakhon Pathom, Nakhon Sawan, Nonthaburi, Pathum Thani, Phetchaburi, Phichit, Phitsanulok, Prachuap Khiri Khan, Ratchaburi, Samut Prakan, Samut Sakhon, Samut Songkhram, Sara Buri, Sing Buri, Suphan Buri, and Uthai Thani — plus Bangkok itself. Ayutthaya, a 90-minute train ride north of the capital, was Thailand’s royal capital for four centuries before its destruction by Burmese forces in 1767; its UNESCO-listed ruins are among the most important historical sites in Southeast Asia. Kanchanaburi, to the west, is where the Death Railway meets the River Kwai and where the dense forests of the Western Forest Complex begin.

Eastern Thailand — 7 provinces

The east runs along the Gulf of Thailand from Bangkok’s doorstep to the Cambodian border — a region that contains both Thailand’s most industrialised coastline and some of its most underrated islands. The seven provinces are Chachoengsao, Chanthaburi, Chon Buri, Prachin Buri, Rayong, Sa Kaeo, and Trat. Chon Buri is home to Pattaya, the beach city that polarises opinion but draws millions regardless. Rayong’s coastline is quieter and increasingly popular with Bangkok weekenders. Chanthaburi is the gemstone capital of Southeast Asia and produces some of Thailand’s best durian and rambutan. Trat is the jumping-off point for Koh Chang, a large, forested island that still feels unhurried despite its accessibility.

Western Thailand — 5 provinces

The west is Thailand’s least-visited region — a thin strip of mountains and river valleys that runs along the Myanmar border from Tak in the north to Prachuap Khiri Khan in the south. The five provinces are Kanchanaburi, Phetchaburi, Prachuap Khiri Khan, Ratchaburi, and Tak. Kanchanaburi is the one most travellers know, for the Bridge on the River Kwai and the wartime cemeteries that draw a steady stream of visitors. Tak is the gateway to the Mae Sot border crossing and the Umphang Wildlife Sanctuary — a vast wilderness of limestone cliffs and waterfalls rarely visited by anyone. Prachuap Khiri Khan, roughly halfway down the Gulf coast, is a quiet fishing town with one of the most photographed bays in Thailand and almost none of the tourist infrastructure of the resorts to its south.

Southern Thailand — 14 provinces

The south is a long, narrow peninsula that extends 1,200 kilometres from the Gulf of Thailand shores of Chumphon to the Malaysian border at the tip. It has coastline on both sides — the Gulf to the east, the Andaman Sea to the west — and the two coasts have different sea states, different seasons, and a different character. The 14 provinces are Chumphon, Krabi, Nakhon Si Thammarat, Narathiwat, Pattani, Phang Nga, Phatthalung, Phuket, Ranong, Satun, Songkhla, Surat Thani, Trang, and Yala. Phuket is the largest and best-known island, a province unto itself connected to the mainland by a single bridge. Krabi is the base for the Railay and Ao Nang beaches and the gateway to Koh Lanta. Surat Thani is the ferry hub for the Gulf islands — Koh Samui, Koh Phangan, and Koh Tao. Phang Nga Bay, shared between Phang Nga and Phuket provinces, contains some of the most dramatic limestone karst scenery in the world. Trang and Satun, at the peninsula’s southern end, remain genuinely off the main tourist trail.

How provinces are governed

Each province is headed by a governor (phu wa ratchakan changwat) appointed by the Ministry of Interior — not elected. This appointed-governor model, inherited from Chulalongkorn’s reforms, means that provincial policy remains closely tied to Bangkok priorities rather than local political platforms. Below the province level, each changwat is divided into districts (amphoe), sub-districts (tambon), and villages (moo ban). Most provinces also have at least one municipality (thesaban) that handles urban services independently of the district structure. For travellers, the practical implication is straightforward: provincial capitals are usually the administrative and transport hub, the place where buses connect, hospitals are found, and immigration offices operate.

Planning across provinces

Thailand’s domestic transport network makes multi-province travel straightforward. Overnight trains connect Bangkok to Chiang Mai in the north, Nong Khai in the northeast, and Surat Thani in the south. Budget airlines — mostly Nok Air, Bangkok Airways, and Thai AirAsia — serve regional airports in Chiang Rai, Udon Thani, Ubon Ratchathani, Krabi, Trang, and Nakhon Si Thammarat among others. The intercity bus network is dense and affordable. Where public transport thins out — Mae Hong Son, Nan, the western border provinces, the deep south — renting a motorbike or hiring a driver becomes the practical choice.

Season matters more than province when planning a Thailand itinerary. The monsoon moves around the peninsula in a counterintuitive pattern: when the Andaman coast (Phuket, Krabi, Koh Lanta) is at its wettest, between May and October, the Gulf coast islands (Koh Samui, Koh Tao, Koh Chang) are typically at their best. The north and northeast have a distinct dry season from November to April, with the cool season peak between December and February. Understanding this pattern — rather than simply picking the most famous province — is what separates a well-timed trip from an expensive mistake.