Postal codes in Thailand

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

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.

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

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

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]

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

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)

• Bangkok uses codes from 10xxx (including Samut Prakan)
• Pattaya uses codes 20xxx (Chonburi province postal codes)

Province codes

1: Central zone

Province	Postcode
Bangkok	10xxx
Samut Prakan	10xxx
Nonthaburi	11xxx
Pathum Thani	12xxx
Ayutthaya	13xxx
Ang Thong	14xxx
Lopburi	15xxx
Sing Buri	16xxx
Chai Nat	17xxx
Saraburi	18xxx

2: Eastern zone

Province	Postcode
Chonburi	20xxx
Rayong	21xxx
Chanthaburi	22xxx
Trat	23xxx
Chachoengsao	24xxx
Prachinburi	25xxx
Nakhon Nayok	26xxx
Sa Kaeo	27xxx

3: Northeastern part 1

Province	Postcode
Nakhon Ratchasima	30xxx
Buriram	31xxx
Surin	32xxx
Sisaket	33xxx
Ubon Ratchathani	34xxx
Yasothon	35xxx
Chaiyaphum	36xxx
Amnat Charoen	37xxx
Bueng Kan	38xxx
Nong Bua Lamphu	39xxx

4: Northeastern part 2

Province	Postcode
Khon Kaen	40xxx
Udon Thani	41xxx
Loei	42xxx
Nong Khai	43xxx
Maha Sarakham	44xxx
Roi Et	45xxx
Kalasin	46xxx
Sakon Nakhon	47xxx
Nakhon Phanom	48xxx
Mukdahan	49xxx

5: Upper Northern zone

Province	Postcode
Chiang Mai	50xxx
Lamphun	51xxx
Lampang	52xxx
Uttaradit	53xxx
Phrae	54xxx
Nan	55xxx
Phayao	56xxx
Chiang Rai	57xxx
Mae Hong Son	58xxx

6: Lower Northern zone

Province	Postcode
Nakhon Sawan	60xxx
Uthai Thani	61xxx
Kamphaeng Phet	62xxx
Tak	63xxx
Sukhothai	64xxx
Phitsanulok	65xxx
Phichit	66xxx
Phetchabun	67xxx

7: Lower Central zone

Province	Postcode
Ratchaburi	70xxx
Kanchanaburi	71xxx
Suphan Buri	72xxx
Nakhon Pathom	73xxx
Samut Sakhon	74xxx
Samut Songkhram	75xxx
Phetchaburi	76xxx
Prachuap Khiri Khan	77xxx

8: Southern zone

Province	Postcode
Nakhon Si Thammarat	80xxx
Krabi	81xxx
Phang Nga	82xxx
Phuket	83xxx
Surat Thani	84xxx
Ranong	85xxx
Chumphon	86xxx

9: Southern border zone

Province	Postcode
Songkhla	90xxx
Satun	91xxx
Trang	92xxx
Phatthalung	93xxx
Pattani	94xxx
Yala	95xxx
Narathiwat	96xxx

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

1. "Reading postal cost". Office of the Royal Society. Retrieved 2022-02-10.
2. Kongmuang, Charatdao (2017). "ประโยชน์ของรหัสไปรษณีย์ มีมากกว่าการส่งจดหมาย" [Uses of Postcode: More than Delivering Letter]. Journal of Social Sciences, Naresuan University (in Thai). 13 (1). doi:10.14456/jssnu.2017.6. Retrieved 2022-02-23.
3. "รหัสไปรษณีย์ประเทศไทย 77 จังหวัด ครบถ้วนในที่เดียว". Thai Rath. Retrieved 2022-02-23.
4. "List of all post offices" (PDF). Thailand Post. Retrieved 2022-02-23.
5. "Postal code according to area" (PDF). Thailand Post. Retrieved 2022-02-26.
6. "Find Service Point". Thailand Post. Retrieved 2024-04-17.
7. Tortermvasana, Komsan (20 August 2018). "Thailand Post aims to upgrade sorting". Bangkok Post. Retrieved 25 August 2018.

External links

• Thailand Post