Devan Nair, Malaysian-Singaporean union leader and politician, 3rd President of Singapore (d. 2005)
Devan Nair Chengara Veetil (Malayalam: ദേവൻ നായർ ചെങ്ങറ വീട്ടിൽ; 5 August 1923 – 6 December 2005), also known as C. V. Devan Nair, was a Malaysian-born Singaporean politician who served as the third President of Singapore between 1981 and 1985.

He was elected by the Parliament to replace Benjamin Sheares as the President of Singapore after Sheares' death in office. Nair was sworn in as president on 23 October 1981. On 28 March 1985, Nair resigned in unclear circumstances.Nair was a Member of Parliament (MP) for Anson between 1979 and 1981, and Bungsar, Selangor between 1964 and 1969. He was the Secretary-General of the Malaysian People's Action Party in 1965 and first secretary-general of the Democratic Action Pary between 1965 and 1967 before being elected as the President of Singapore by the Parliament of Singapore.

Nair died on 6 December 2005 at Hamilton, Ontario, Canada.