Bang Yai may refer to:
- Bang Yai District in Nonthaburi Province, Thailand
- Bang Yai Subdistrict, Nonthaburi, within the district
- Sao Thong Hin, a municipality and subdistrict within the district, and its current administrative centre, the area of which is commonly referred to as Bang Yai
- Sam Yaek Bang Yai MRT station, which serves the area
- Talad Bang Yai MRT station, which also serves the area