Bang Rak Yai (Thai: บางรักใหญ่, pronounced [bāːŋ rák jàj]) is one of the eight subdistricts (tambon) of Bang Bua Thong District, in Nonthaburi Province, Thailand. The subdistrict is bounded by (clockwise from north) Bang Rak Phatthana, Bang Rak Noi, Bang Len and Sao Thong Hin subdistricts. In 2020 it had a total population of 9,547 people.