The Ersuic languages (, Ersu; also called Duoxu or Erhsu) are a Qiangic language cluster of the Sino-Tibetan language family. Ersu languages are spoken by about 20,000 people in China as reported by . Muya (alternatively Menia or Menya) is reported to be related, but it is not known how it fits in.

Ersuic speakers live in the western part of China's Sichuan