Yanxi may refer to:
Locations in China Fujian Yanxi, Changtai County (岩溪), a town in Changtai County Yanxi Subdistrict (燕西街道), a subdistrict in Yong'an
Hunan Yanxi, Anhua County (烟溪), a town in Anhua County Yanxi, Liuyang (沿溪), a town in Liuyang Yanxi Township, Hunan (沿溪乡), a township in Xupu County
Jiangxi Yanxi, Taihe County (沿溪), a town in Taihe County, Jiangxi Yanxi, Xiajiang County (砚溪), a town in Xiajiang County
Other provinces Yanxi, Chongqing (沿溪), a town in Shizhu Tujia Autonomous County, Chongqing Yanxi Township, Sichuan (烟溪乡), a township in Tongjiang County, Sichuan
Historical eras Yanxi (延熹, 158–167), era name by Emperor Huan of Han Yanxi (延熙, 238–257), era name by Liu Shan, emperor of Shu Han Yanxi (延熙, 334), era name by Shi Hong, emperor of Later Zhao