Liangshan, officially the Liangshan Yi Autonomous Prefecture, is an autonomous prefecture occupying much of the southern extremity of Sichuan province, People's Republic of China; its seat is Xichang. Liangshan has an area of 60,261 km² and over 4.5 million inhabitants. It is also has the largest population of ethnic Yi nationally. Liangshan Li contains a number of isolated villages high up on its cliffs, often known as "cliff villages".
Xichang has the Xichang Qingshan Airport and the Xichang Satellite Launch Center. The prefecture also features a substantial network of railways for both passengers and freight.