Sai_Mai_district Latitude and Longitude:

13°55′9″N 100°38′45″E / 13.91917°N 100.64583°E / 13.91917; 100.64583
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Sai Mai
Soi Phahon Yothin 54, Khlong Thanon, Sai Mai
Soi Phahon Yothin 54, Khlong Thanon, Sai Mai
Khet location in Bangkok
Khet location in Bangkok
Coordinates: 13°55′9″N 100°38′45″E / 13.91917°N 100.64583°E / 13.91917; 100.64583
Province Bangkok
Seat O Ngoen
District established21 November 1997
 • Total44.615 km2 (17.226 sq mi)
 • Total208,928 [1]
 • Density4,682.91/km2 (12,128.7/sq mi)
Time zone UTC+7 ( ICT)
Postal code

Sai Mai ( Thai: สายไหม, pronounced [sǎːj mǎj]) is one of the 50 districts (khet) of Bangkok, Thailand. It is bounded by (from north clockwise): Lam Luk Ka district of Pathum Thani province; Khlong Sam Wa, Bang Khen and Don Mueang of Bangkok.


Sai Mai was the name of a muban (village) in tambon (sub-district) Khu Khot, Lam Luk Ka District, Pathum Thani Province. It was transferred to Bang Khen district and promoted to subdistrict ( tambon) in 1940. Due to the growth of population in the area, Sai Mai was elevated to district status effective 21 November 1997 to improve service and administration. [3]

The name of the village "Sai Mai" ("late or not?") is believed to come from a story told in the past as the area was very far from the downtown. Hence, passing by people often ask, "Will it be late to get here?". It is not related to Roti sai mai in any way. [4]

The dominant feature of the district is Khlong (canal) Lat Phrao. The canal is thought to have been dug in the early period of the Rattanakosin Kingdom (1782–1932). Khlong Lat Phrao is one of nine canals in Bangkok that drains rainwater flowing into the city from northern Thailand, but it has been neglected for decades and clogged with refuse. In January 2016, 1.6 billion baht was allocated to rehabilitate the canal, widen it to 38 metres and deepen it to four metres. Construction is to be completed by June 2019. [5]


The district is divided into three sub-districts ( khwaeng).

No. Name Thai Area
Sai Mai สายไหม
O Ngoen ออเงิน
Khlong Thanon คลองถนน



There are three BTS Skytrain Sukhumvit line stations in Sai Mai: Bhumibol Adulyadej Hospital, Royal Thai Air Force Museum, and Yaek Kor Por Aor. All stations are on the Phahonyothin Road, the westside border to Don Mueang district.


  1. ^ "Population and House Report for Year 2022 (see page 2 for data of this district)". Department of Provincial Administration, Ministry of Internal Affairs. Retrieved 1 April 2023. ( Search page)
  2. ^ Administrative Strategy Division, Strategy and Evaluation Department, Bangkok Metropolitan Administration (2021). สถิติกรุงเทพมหานครประจำปี 2563 [Bangkok Statistics 2020] (PDF) (in Thai). Retrieved 27 November 2021.{{ cite web}}: CS1 maint: multiple names: authors list ( link)
  3. ^ ประกาศกระทรวงมหาดไทย เรื่อง เปลี่ยนแปลงพื้นที่เขตบางเขน เขตลาดพร้าว เขตบึงกุ่ม เขตประเวศ และตั้งเขตสายไหม เขตคันนายาว เขตสะพานสูง (PDF). Royal Gazette (in Thai). 114 (พิเศษ 108 ง): 6. 18 November 1997. Archived from the original (PDF) on 7 November 2011.
  4. ^ Naktong, Kittinan (15 December 2020). ""สายไหม" ในวันที่รถไฟฟ้าสายสีเขียวมาถึงคูคต" ["Sai Mai" on the day when the Green Line Skytrain arrived in Khu Khot]. ASTV Manager (in Thai). Retrieved 5 February 2021.
  5. ^ Wancharoen, Supoj (7 April 2019). "Canal's redevelopment sees local hopes swell". Bangkok Post. Retrieved 7 April 2019.

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