The Western Xia or the Xi Xia (Chinese: 西夏; pinyin: Xī Xià; Wade–Giles: Hsi1 Hsia4), officially the Great Xia (大夏; Dà Xià; Ta4 Hsia4), also known as the Tangut Empire, and known as Mi-nyak to the Tanguts and Tibetans, was a Tangut-led Buddhist imperial dynasty of China that existed from 1038 to 1227. At its peak, the dynasty ruled over modern-day northwestern China, including parts of Ningxia, Gansu, eastern Qinghai, northern Shaanxi, northeastern Xinjiang, and southwest Inner Mongolia, and southernmost Outer Mongolia, measuring about 800,000 square kilometres (310,000 square miles).

The Tangut people were a Sino-Tibetan people who founded and inhabited the Western Xia dynasty. The group initially lived under Tuyuhun authority, but later submitted to the Tang dynasty. After the collapse of Tang dynasty, the Tanguts established the Western Xia. They spoke the Tangut language, which was previously believed to be one of the Qiangic languages or Yi languages which belong to the Tibeto-Burman family." Phylogenetic and historical linguistic accounts, however, reveal that Tangut belonged instead to the Gyalrongic branch of Tibeto-Burman. Western Xia was annihilated by the Mongol Empire in 1227, most of its written records and architecture were destroyed. Today the Tangut language and its unique script are extinct; only fragments of Tangut literature remain.