Cao Minh is a commune in Tràng Định District, Lang Son Province, Vietnam.
Cao Minh borders Bắc Kạn Province to the west, and the communes Doan Ket and Tan Tien to the northeast and south. It's administrative center is at Vang Can.[1]
Cao Minh has a population of 1109 (1997) in 8 villages. 64% of the population are Mieu (officially a subgroup of the Hmong) and most of the rest Yao and Tay, with a very small Nung minority.[2]