Thailand divides its settlements (thesaban) into three categories by size: city municipalities (thesaban nakhon), towns (thesaban mueang) and townships (or subdistrict municipality) (thesaban tambon).[1] There are 33 city municipalities as of November 2024.
The national capitalBangkok and the special governed cityPattaya fall outside these divisions. They are "self-governing districts".
Due to the outdated nature of thethesaban system, any city municipality's growth subsequent to its settlement designation is not included in both area and population numbers. For this reason, the Department of Public Works and Town & Country Planning,[2] and each province'sProvincial Administrative Organization regularly revise and publish up-to-date city boundaries (Thai:เขตเมือง) to reflect population growth. These revisions are royally decreed and published in theRoyal Thai Government Gazette. The term เขตเมือง/khet mueang can also be translated to the termurban area, a widely used term to describe and designate large cities.
Most Thai cities' revised boundaries are contained in the province's capital district, known asAmphoe Mueang.Chiang Mai is the only city outsideBangkok to cover multiple districts in its urban area. Bangkok and Chiang Mai are the only cities in Thailand with a population of over one million.
Thailand has an urbanization rate of 52% (2021), translating to 36,217,020 people of the total population.[3][4] This rate is based on thethesaban system, meaning that 8,442,107 people live in city municipalities, 4,437,112 people live in town municipalities and 23,337,801 people in townships (subdistrict municipalities). According to thekhet mueang system, 21,838,418 people (31.35% of total population) live in urban areas with a population greater than 150,000.
Several agencies issue population figures. Locally registered Thai populations are compiled by theDepartment of Local Administration (DLA). These figures are labeled as "Locally Registered Thai Population" and reflect the migrant, upcountry, and seasonal nature of Thai labor flows to the capital and tourist hot spots, yet maintain upcountry registration. Figures are very different from those by theNational Statistics Office (NSO), which conducts the decennial census by attempting to count the total resident Thai population plus under 1,000 permanent resident foreigners. The result by the NSO is labeled as "Total Thai Population". Neither of the two offices release municipal level figures that include non-permanent residents, long-stay expatriates and figures for contracted foreignASEAN migrants (a significant labor segment in cities like Bangkok, Pattaya, Chiang Mai, and Phuket, totaling two to three million workers), though this inclusion is being increasingly regularized since 2014. The NSO did release projected figures including regularized ASEAN migrants, i.e., "total resident population" down to the provincial level for 2017.[5]
The table below listsDepartment of Local Administration (DLA) (local registered Thai) 2020 figures. For the NSO compiled total Thai residentdecennial census municipal countsview here..
In most cases, municipal population numbers do not represent the current size of each individual city, but only the administrative core. Geographically limited city municipalities such asKoh Samui and thesuburban city municipalities of Bangkok, namelyNonthaburi,Pak Kret,Samut Prakan,Nakhon Pathom, andSamut Sakhon, are the exception.Bangkok's suburban areas are inside theBangkok Metropolitan Region and therefore do not have their own urban or metropolitan area.
| No. | Name | Thai | District, Province | Area (km2) | Population (Dec 2020)[6] | Date, city designation |
|---|---|---|---|---|---|---|
| 1 | Krung Thep Maha Nakhon (Bangkok) | กรุงเทพมหานคร | 1,568.74 | 5,588,222 | 1972-12-14 | |
| 2 | Nonthaburi | นนทบุรี | Mueang Nonthaburi,Nonthaburi | 38.90 | 251,026 | 1995-09-23 |
| 3 | Pak Kret | ปากเกร็ด | Pak Kret,Nonthaburi | 36.04 | 189,458 | 2000-02-16 |
| 4 | Hat Yai | หาดใหญ่ | Hat Yai,Songkhla | 21.00 | 149,459 | 1995-09-23 |
| 5 | Chaophraya Surasak | เจ้าพระยาสุรศักดิ์ | Si Racha,Chonburi | 276.98 | 146,474 | 2013-05-01 |
| 6 | Surat Thani | สุราษฎร์ธานี | Mueang Surat Thani,Surat Thani | 68.97 | 131,599 | 2007-05-04 |
| 7 | Nakhon Ratchasima | นครราชสีมา | Mueang Nakhon Ratchasima,Nakhon Ratchasima | 37.50 | 122,730 | 1995-09-23 |
| 8 | Chiang Mai | เชียงใหม่ | Mueang Chiang Mai,Chiang Mai | 40.22 | 122,627 | 1936-03-28 |
| 9 | Udon Thani | อุดรธานี | Mueang Udon Thani,Udon Thani | 47.70 | 120,202 | 1995-09-23 |
| 10 | Pattaya | พัทยา | Bang Lamung,Chonburi | 53.44 | 117,606 | 1978-11-29 |
| 11 | Khon Kaen | ขอนแก่น | Mueang Khon Kaen,Khon Kaen | 46.00 | 110,615 | 1995-09-23 |
| 12 | Nakhon Si Thammarat | นครศรีธรรมราช | Mueang Nakhon Si Thammarat,Nakhon Si Thammarat | 22.56 | 100,416 | 1994-08-15 |
| 13 | Laem Chabang | แหลมฉบัง | Si Racha,Chonburi | 88.59 | 89,457 | 2010-05-24 |
| 14 | Rangsit | รังสิต | Thanyaburi,Pathum Thani | 20.80 | 84,268 | 2011-04-29 |
| 15 | Nakhon Sawan | นครสวรรค์ | Mueang Nakhon Sawan,Nakhon Sawan | 27.87 | 81,239 | 1995-09-23 |
| 16 | Phuket | ภูเก็ต | Mueang Phuket,Phuket | 12.00 | 77,778 | 2004-02-13 |
| 17 | Chiang Rai | เชียงราย | Mueang Chiang Rai,Chiang Rai | 60.85 | 77,545 | 2004-02-13 |
| 18 | Ubon Ratchathani | อุบลราชธานี | Mueang Ubon Ratchathani,Ubon Ratchathani | 29.04 | 72,855 | 1999-03-06 |
| 19 | Nakhon Pathom | นครปฐม | Mueang Nakhon Pathom,Nakhon Pathom | 19.85 | 72,753 | 1999-11-07 |
| 20 | Ko Samui | เกาะสมุย | Ko Samui district [th],Surat Thani | 252.00 | 68,994 | 2012-09-14 |
| 21 | Samut Sakhon | สมุทรสาคร | Mueang Samut Sakhon,Samut Sakhon | 10.33 | 65,409 | 1999-11-07 |
| 22 | Phitsanulok | พิษณุโลก | Mueang Phitsanulok,Phitsanulok | 18.26 | 64,068 | 1999-03-06 |
| 23 | Rayong | ระยอง | Mueang Rayong,Rayong | 16.95 | 62,384 | 1999-11-07 |
| 24 | Songkhla | สงขลา | Mueang Songkhla,Songkhla | 9.27 | 60,021 | 1999-11-07 |
| 25 | Yala | ยะลา | Mueang Yala,Yala | 19.00 | 59,983 | 1995-09-23 |
| 26 | Trang | ตรัง | Mueang Trang,Trang | 14.77 | 56,893 | 1999-11-07 |
| 27 | Om Noi | อ้อมน้อย | Krathum Baen,Samut Sakhon | 30.40 | 53,822 | 2010-11-11 |
| 28 | Sakon Nakhon | สกลนคร | Mueang Sakon Nakhon,Sakon Nakhon | 54.54 | 51,331 | 2012-03-08 |
| 29 | Lampang | ลำปาง | Mueang Lampang,Lampang | 22.17 | 50,697 | 1999-11-07 |
| 30 | Samut Prakan | สมุทรปราการ | Mueang Samut Prakan,Samut Prakan | 7.33 | 49,604 | 1999-03-23 |
| 31 | Phra Nakhon Si Ayutthaya | พระนครศรีอยุธยา | Phra Nakhon Si Ayutthaya,Phra Nakhon Si Ayutthaya | 14.84 | 49,208 | 1999-12-14 |
| 32 | Mae Sot | แม่สอด | Mae Sot,Tak | 27.20 | 41,581 | 2010-01-28 |
| 33 | Buriram | บุรีรัมย์ | Mueang Buriram,Buriram | 75.44 | 25,087 | 2024-10-31[7] |
The following table lists the 10 largest cities in Thailand by urban population, based onDepartment of Local Administration (DLA) figures. These figures represent the current size of each city, accounting for areal and population growth subsequent to each city's originalcity municipality designation.
Bangkok andChiang Mai are the only cities covering multiple districts (known asKhet for Bangkok andAmphoe for the provinces), and the only two cities with a population of over one million. AlthoughPattaya is a "self-governing district" (located inside, but not part ofBang Lamung district), it has grown into all neighboringsub-districts and accounts for the largest population percentage, making it de facto a part of the "Pattaya-Bang Lamung-Jomtien" area. Chiang Mai is the only provincial city whose city boundaries (Thai:เขตเมือง) cover districts adjacent to the Amphoe Mueang district (Capital district).[8]
| No. | Name | Thai | Province | Area (km2)[8] | Population (2021)[9] |
|---|---|---|---|---|---|
| 1 | Krung Thep Maha Nakhon (Bangkok) | กรุงเทพมหานคร | 1,568.74 | 10,539,000 | |
| 2 | Chiang Mai | เชียงใหม่ | Chiang Mai | 405 | 1,198,000 |
| 3 | Nakhon Ratchasima | นครราชสีมา | Nakhon Ratchasima | 755.6 | 466,098 |
| 4 | Khon Kaen | ขอนแก่น | Khon Kaen | 953.4 | 412,758 |
| 5 | Hat Yai | หาดใหญ่ | Songkhla | 852.796 | 404,044 |
| 6 | Udon Thani | อุดรธานี | Udon Thani | 1,094.7 | 400,581 |
| 7 | Chon Buri | ชลบุรี | Chon Buri | 228.8 | 342,959 |
| 8 | Pattaya | พัทยา | Chon Buri | 727 | 328,961 |
| 9 | Si Racha | ศรีราชา | Chon Buri | 616.4 | 327,172 |
| 10 | Phitsanulok | พิษณุโลก | Phitsanulok | 777 | 281,929 |


Department of Local Administration (DLA) figures. The towns in bold characters are capitals.
There were 2,266 township municipalities as of 20 December 2017.[11]
| Name | Thai | Province | Population (2015)[12] |
|---|---|---|---|
| Chai Prakan | ไชยปราการ | Chiang Mai | 16,044 |
| Mae Ai | แม่อาย | Chiang Mai | 8,480 |
| Mae Sai | แม่สาย | Chiang Rai | 22,778 |
| Nong Bua | หนองบัว | Chiang Mai | 13,302 |
| Phimai | พิมาย | Nakhon Ratchasima | 9,878 |
| Wiang Fang | เวียงฝาง | Chiang Mai | 7,652 |
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