Bang Bua Thong (, ) is one of the eight subdistricts (tambon) of Bang Bua Thong District, in Nonthaburi Province, Thailand. Neighbouring subdistricts are (clockwise from north) Lahan, Phimon Rat, Sano Loi, Phimon Rat and Sai Noi. In 2020, it had a total population of 62,632 people.
The subdistrict is subdivided into 14 administrative villages (muban).
The area of the subdistrict is shared by two local administrative organizations.