Tri-Mountain National Scenic Area (Chinese: 參山國家風景區; pinyin: Sānshān Guójiā Fēngjǐngqū) is a national scenic area located within central Taiwan, spanning Hsinchu County, Miaoli County, Taichung City, Changhua County, and Nantou County. The area is composed of three non-contiguous scenic areas (Baguashan, Shitoushan, and Lishan), which are all named after mountains, hence the name.

The three scenic areas were formerly distinct and designated as province-level scenic areas. With the deprecation of the Taiwan Provincial Government, the areas were merged into one for easier management on 16 March 2001. The management office is located outside of the scenic area in Wufeng District, Taichung.