Bang Khun Thian (Thai: บางขุนเทียน, pronounced [bāːŋ kʰǔn tʰīa̯n]) is a khwaeng (sub-district) of Chom Thong district, Bangkok.

It is also proposed that the name comes from the name of a nobleman Khun Thian (ขุนเทียน), who played a role in overseeing the area and vicinity.

[3] Wat Sai floating market used to be in the area of Wat Sai rim Klong Dan or Khlong Sanam Chai used to be a very popular and famous floating market in the 1960s, when it was promoted as a tourist destination by Field Marshal Sarit Thanarat government, but has now closed completely.

[4] Bang Khun Thian is regarded as the northwest part of the district, with a total area of 5.789 km2 (2.235 mi2).

Bang Khun Thian can also be reached by train via the Maeklong Railway that passes through the area.