Bang Si Thong

Bang Si Thong (บางสีทอง, ) is one of the nine subdistricts (tambon) of Bang Kruai District, in Nonthaburi Province, Thailand. The subdistrict is bounded by (clockwise from north) Bang Krang, Bang Si Mueang, Bang Phai, Bang Kruai, Wat Chalo and Bang Khanun subdistricts. In 2020, it had a total population of 11,426 people.

Central administration
The subdistrict is subdivided into 5 administrative villages (muban).

Local administration
The whole area of the subdistrict is covered by Bang Si Thong Subdistrict Municipality (เทศบาลตำบลบางสีทอง).