According to the economic zoning employed by the government of Vietnam, Trung Bộ borders the provinces Ninh Bình, Hòa Bình and Sơn La of Northern Vietnam to the north, provinces of Bình Phước, Đồng Nai and Bà Rịa–Vũng Tàu of Southern Vietnam to the south. To the east it borders the South China Sea (Biển Đông), to the west it borders Cambodia and Laos.