Hulunbuir is a region that is governed as a prefecture-level city in northeastern Inner Mongolia, in the People's Republic of China. Its administrative center is located at Hailar District, its largest urban area. Major scenic features are the high steppes of the Hulun Buir grasslands, the Hulun and Buir lakes (the latter partially in Mongolia), and the Khingan range.
Hulun Buir borders Russia, Mongolia, Heilongjiang province and Hinggan League. Hulunbuir is a linguistically diverse area: next to Mandarin Chinese, Mongolian dialects such as Khorchin and Buryat, the Mongolic language Dagur and some Tungusic languages are spoken there.