Mount Tangjia (Chinese: 唐家山; pinyin: Tángjiā Shān) is a mountain in Sichuan Province, China, 3.2 kilometers (2.0 mi) away from the county seat of Beichuan County.

It overlooks the Jian River and Tangjiashan Lake, a landslide dam-created lake which was formed by the 2008 Sichuan earthquake.