Sai Mai District

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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; 100.64583Coordinates: 13°55′9″N 100°38′45″E / 13.91917°N 100.64583°E / 13.91917; 100.64583
SeatO Ngoen
District established21 November 1997
 • Total44.615 km2 (17.226 sq mi)
 • Total202,590[1]
 • Density4,540.84/km2 (11,760.7/sq mi)
Time zoneUTC+7 (ICT)
Postal code

Sai Mai District (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. As of 2014, it had the highest population of all districts in Bangkok.


Sai Mai was the name of a muban in tambon 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.[2]

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 and widen it to 38 metres and deepen it to four metres. Construction is to be completed by June 2019.[3]



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

1. Sai Mai สายไหม
2. O Ngoen ออเงิน
3. Khlong Thanon  คลองถนน


  1. ^ "Population and House Report for Year 2017 (see page 2 for data of this district)". Department of Provincial Administration, Ministry of Internal Affairs. Retrieved 2018-04-01. (Search page)
  2. ^ ประกาศกระทรวงมหาดไทย เรื่อง เปลี่ยนแปลงพื้นที่เขตบางเขน เขตลาดพร้าว เขตบึงกุ่ม เขตประเวศ และตั้งเขตสายไหม เขตคันนายาว เขตสะพานสูง (PDF). Royal Gazette (in Thai). 114 (พิเศษ 108 ง): 6. 1997-11-18.
  3. ^ Wancharoen, Supoj (2019-04-07). "Canal's redevelopment sees local hopes swell". Bangkok Post. Retrieved 2019-04-07.

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