- Language: Thao
- Alternate names: Sau, Sao, Shao, Chuihwan, Chui-Huan, Suihwan, Vulung, Sprache von Formosa, 邵語
- Language code: ssf
- Language family: Austronesian, Western Plains Austronesian
- Number of speakers: 4
- Vulnerability: Endangered
- Script: Latin script.
Cooperation with the Bunun (See: [[Bunun]]), intermarriage with Bunun women, loanwords from Bunun.
Thao is spoken in Taiwan, East Asia.