Dong Nai Province is in the Saigon/Ho Chi Minh City part of Vietnam, bordered by Lam Dong Province to its north, Binh Thuan Province to the east, and Ba Ria-Vung Tau Province on the south. On its western side are Binh Duong, Binh Phuoc Provinces and Saigon/Ho Chi Minh City in the west.
Its capital is Bien Hoa, which was a major airbase during the Vietnam War. Within Bien Hoa city is the Long Binh ward, a wartime logistics center containing the "LBJ" or Long Binh Jail military prison, is in the province. The ward is now the Agtex Long Binh Industrial Zone.