Postal codes in Thailand are five digit numbers. The first two digits of the postal code denote the province or special administrative area (e.g., 43120 Phon Phisai, Nong Khai), while the last 3 digits represent the post office within the province.[1] There are exceptions, for example, Bangkok and Samut Prakan province shared the first two digits 10xxx. It's typical to use postal code ended with zero 0 because they are assigned to post office that are responsible for delivering mail to the district (amphoe or khet).[2] For example, mails to Dusit district destinations uses postal code 10300 except within Chitralada Palace where postal code 10303 is used.[3] 10300 is postal code of Dusit Post Office which handles the delivery throughout Dusit district while 10303 is postal code of Chitralada Palace Post Office which does not deliver mails outside the palace.[4] Other post offices in Dusit district exist, such as Bang Krabu Post Office with postal code 10301, the code used for mails to be delivered to P.O. Box in the post office.

Postal code of a given location can be found on the side of Thai postal box there. In the picture, this is 82220.

Postcodes in Thailand were introduced in February 1982.[2] They are issued by the Ministry of Digital Economy and Society (MDES).

More information Postcode ...
Postcode
Province (Changwat) District (Amphoe)
XX XXX
Not in the postcode in Thailand
Subdistrict
(Tambon)
Village
(Muban)
Road
(Thanon)
Plot/house
888/26
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Postal zones in Thailand

Postal zone is the first digit of postal code. It is numbered from 1 to 9. Nong Bua Lamphu province and Bueng Kan province have to use postal zone 3 despite its location because at the time of their establishment, postal zone 4 was fully used.[2]

More information Postcode, Zone ...
Postal zones
Postcode Zone
10xxx - 18xxx 1: Central zone
20xxx - 27xxx 2: Eastern zone
30xxx - 39xxx 3: Northeastern part 1
40xxx - 49xxx 4: Northeastern part 2
50xxx - 58xxx 5: Upper Northern zone
60xxx - 67xxx 6: Lower Northern zone
70xxx - 77xxx 7: Lower Central zone
80xxx - 86xxx 8: Southern zone
90xxx - 96xxx 9: Southern border zone
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Province and special administrative area

Listed below are the first 2 digits of codes assigned to each province or special administrative area.[5]

Special Governed Districts (Khet Phiset)

Province codes

More information Province, Postcode ...
1: Central zone
Province Postcode
Bangkok10xxx
Samut Prakan10xxx
Nonthaburi11xxx
Pathum Thani12xxx
Ayutthaya13xxx
Ang Thong14xxx
Lopburi15xxx
Sing Buri16xxx
Chai Nat17xxx
Saraburi18xxx
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More information Province, Postcode ...
2: Eastern zone
Province Postcode
Chonburi20xxx
Rayong21xxx
Chanthaburi22xxx
Trat23xxx
Chachoengsao24xxx
Prachinburi25xxx
Nakhon Nayok26xxx
Sa Kaeo27xxx
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More information Province, Postcode ...
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More information Province, Postcode ...
4: Northeastern part 2
Province Postcode
Khon Kaen40xxx
Udon Thani41xxx
Loei42xxx
Nong Khai43xxx
Maha Sarakham44xxx
Roi Et45xxx
Kalasin46xxx
Sakon Nakhon47xxx
Nakhon Phanom48xxx
Mukdahan49xxx
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More information Province, Postcode ...
5: Upper Northern zone
Province Postcode
Chiang Mai50xxx
Lamphun51xxx
Lampang52xxx
Uttaradit53xxx
Phrae54xxx
Nan55xxx
Phayao56xxx
Chiang Rai57xxx
Mae Hong Son58xxx
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More information Province, Postcode ...
6: Lower Northern zone
Province Postcode
Nakhon Sawan60xxx
Uthai Thani61xxx
Kamphaeng Phet62xxx
Tak63xxx
Sukhothai64xxx
Phitsanulok65xxx
Phichit66xxx
Phetchabun67xxx
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More information Province, Postcode ...
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More information Province, Postcode ...
8: Southern zone
Province Postcode
Nakhon Si Thammarat80xxx
Krabi81xxx
Phang Nga82xxx
Phuket83xxx
Surat Thani84xxx
Ranong85xxx
Chumphon86xxx
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More information Province, Postcode ...
9: Southern border zone
Province Postcode
Songkhla90xxx
Satun91xxx
Trang92xxx
Phatthalung93xxx
Pattani94xxx
Yala95xxx
Narathiwat96xxx
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Numbering within the province

The third and fourth digit is used to distinguish different area within the province while the last digit is zero for the main post office handling the mail delivery while other post offices in the area have other numbers.

Outside of Bangkok and Samut Prakan, the postal code xx000 is the postal code for the main post office of Amphoe mueang of each province.[2] The remaining area number runs in the sequence xx110, xx120, xx130, ..., xx190, xx210, ...

Bangkok number system replaces the previous mail addressing system of Bangkok 1, Bangkok 2, etc. Bangkok 1 area becomes 10100, Bangkok 2 becomes 10200, etc. There is special case that Bangkok 10 becomes 10310, while Bangkok 11, 12, etc. becomes 10110, 10120, etc. There is no postal area 10000 while the number is assigned to Bangkok Mail Center.[6]

Mail facilities

In 2018 Thailand Post allocated 10 billion baht to construct two new "automated sorting" centers, one in Chonburi Province and the other in Wang Noi District, Ayutthaya Province. Its goal is to fully automate postal and delivery operations as well back office procedures in 2021.[7]

References

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