Duyun is the capital of Qiannan Buyei and Miao Autonomous Prefecture in Guizhou province, China.

Qiannan Buyei and Miao Autonomous Prefecture is an autonomous prefecture of Guizhou province, People's Republic of China, bordering Guangxi to the south. The prefecture's seat is Duyun, while its area is 26,192 km2 (10,113 sq mi). The name "黔南" derives from the prefecture's south-central location in the province; "黔" is the official abbreviation for Guizhou, while "南" means "south".