Yongshan County () is a county in the northeast of Yunnan Province, China, bordering Sichuan Province to the north and northwest across the Jinsha River. It is under the administration of the prefecture-level city of Zhaotong.
There are two main Yi ethnic subgroups in Yongshan County, namely Laluo (è Âç½Â) and Niesu (èÂÂèÂÂ).
Yongshan County has 8 towns, 5 townships and 2 ethnic townships.
Yongshan was a state-designated poor county, which means the average income of its people is below 530 yuan a year - that is, less than 30 US cents a day.