Location of the Tây Bắc (Northwest) region in Vietnam
Tây Bắc (literally "Northwest") is one of the regions of Vietnam, located in the mountainous northwestern part of the country. It consists of four provinces: Điện Biên, Lai Châu, Sơn La, and Hòa Bình. The two provinces Lào Cai and Yên Bái are usually seen as part of the Northwest region. It has a population of about two and a half million.