Bang Khu Rat (, ) is one of the eight subdistricts (tambon) of Bang Bua Thong District, in Nonthaburi Province, Thailand. The subdistrict is bounded by (clockwise from north) Phimon Rat, Bang Rak Phatthana, Bang Mae Nang, Ban Mai, Nong Phrao Ngai and Thawi Watthana subdistricts. In 2020, it had a total population of 40,360 people.
The subdistrict is subdivided into 10 administrative villages (muban).
The whole area of the subdistrict is covered by Bang Khu Rat Town Municipality ().