Bang Muang (, ) is one of the six subdistricts (tambon) of Bang Yai District, in Nonthaburi Province, Thailand. Neighbouring subdistricts are (from north clockwise) Bang Mae Nang, Sao Thong Hin, Bang Len, Bang Khu Wiang, Plai Bang, Sala Klang and Bang Yai. In 2020, it had a total population of 19,518 people.
The subdistrict is subdivided into 15 administrative villages (muban).
The area of the subdistrict is shared by two local administrative organizations.