The Hinggan League is a prefecture-level subdivision of the Inner Mongolia Autonomous Region of the People's Republic of China. It borders Hulun Buir to the north, the Republic of Mongolia and Xilingol League to the west, Tongliao to the south and the provinces of Jilin and Heilongjiang to the east. The name is derived from the Greater Khingan mountain range that crosses the league from the northwest to the southeast.