Yunlong County () is under the administration of the Dali Bai Autonomous Prefecture in the northwest of Yunnan Province, China; it is the westernmost county-level division of Dali Prefecture.
Yunlong borders Eryuan County and Yangbi County to the east, Yongping County and Longyang District to the south, Lushui to the west, and Jianchuan County and Lanping County to the north.
Yunlong County has 4 towns, 5 townships and 2 ethnic townships.
There are 2,448 Achang in Yunlong County, most of whom reside in Renshan Village ä»Âå±±æÂÂ, Caojian Town æ¼Âæ¶§é (Dali Ethnic Gazetteer 2009:216).