Cao Bang is a province of northeastern Vietnam. The province has borders with Hà Giang, Tuyên Quang, Bắc Kạn, and Lạng Sơn provinces within Vietnam. It also has common international border with Guangxi province of the People’s Republic of China. The province covers an area of 6724.6 square kilometres and as of 2008 it had a population of 528,100 people.

It has a rich history traced to the Bronze Age of the Tay Au Kingdom in Vietnam. The dynasties that ruled the area were Tay lords, Be Khac Thieu and Nag Dac Thai.

The province is in the region where the Vietnamese people lived thousands of years ago before their southwards expansion. Thus, Cao Bằng has several points of historical interest as well as many natural features such as the Pac Bo (at the mouth of the confluence of two rivers namely Bang Giang and Hien rivers) where Ho Chi Minh in January 1941 established a revolutionary force at a cave (Coc Bo Cave), the Mạc King's Temple, the Kỳ Sầm Temple, Coi Bin Church, the Bản Giốc waterfall area at the international border between Vietnam and China and the Thang Hen Mountain Lake.