Nauo (also recorded as Nhawu, Nawo, Njao, and other variations) is an extinct and little-recorded Australian Aboriginal language that was spoken by the Nauo people on the southern part of the Eyre Peninsula, South Australia. Tindale in 1974 considered the language extinct by the time of linguistic investigations done to determine Nauo's status in the 1930s.
The Nauo language may have been related to the languages of its regional neighbours on the Eyre Peninsula, such as Barngarla or Wirangu.
- Hercus, Luise; Simpson, Jane (2001). "The tragedy of Nauo". Forty years on: Ken Hale and Australian languages. Canberra: Pacific Linguistics. pp. 263–290.