Thái Nguyên is a province in the Northeast region of Vietnam. It is a mountainous, midland province with a natural land area of 3,521.96 km2 (1,359.84 sq mi) and a population of 1,350,345 as of 2023. Its multi-ethnic society is composed of eight ethnic groups.

Đông Bắc is the region to the north of the Red River Delta in Vietnam, bordering China. It is called Northeast to distinguish it from the Tây Bắc or "Northwest", but it is actually in the north and northeast of Hanoi, wider than Việt Bắc or "Northern Vietnam". The Northeast is one of three sub-regions of Northern Vietnam. Sometimes the Northeast includes the Red River Delta.