Huàyīn is a county-level city in Shaanxi Province, China, located at the northeastern base of Mount Hua (Huà Shān), one of China’s Five Great Mountains and a renowned Taoist sacred site. The name literally means 'north side of Mount Hua'—in traditional Chinese geography, 'yīn' refers to the north or shaded side of a mountain (or south side of a river), while 'huá' is the abbreviated name for Mount Hua. Though 'huá' can also mean 'magnificent' or refer to Chinese civilization (as in Zhōnghuá), here it specifically denotes the mountain.

Huàyīn is historically significant as the gateway to Mount Hua’s hiking trails and cable car routes, and it hosts cultural landmarks such as the Western Yue Temple. It is not a major urban center but functions primarily as a tourism and transportation hub for pilgrims and climbers. Locals and travelers alike use the name Huàyīn when referring to the city itself, its administrative area, or its role as the access point to the mountain.