Đồng Nai is a province in the Southeast region of Vietnam, located east and northeast of Ho Chi Minh City (Saigon). The capital city and the largest city in Đồng Nai is Biên Hòa.

Đông Nam Bộ is a region in Vietnam. This region includes one municipality, Ho Chi Minh City; and five provinces: Đồng Nai, Bình Dương, Bà Rịa–Vũng Tàu province, Bình Phước and Tây Ninh. The two south central provinces Ninh Thuận and Bình Thuận are sometimes seen as part of the Southeast region. This region is the most economically developed region in Vietnam. In 2006, this region contributed 148,000 billion VND out of 251,000 billion VND to the state budget. This region is also the most highly urbanized in the country with more than 50% people living in urban areas.