Reginald Alexander Duff (17 August 1878 – 13 December 1911) was an Australian cricketer who played in 22 Tests between 1902 and 1905.

Duff made his Test debut along with Warwick Armstrong,[1] against England at Melbourne in 1901–02 and scored 104 after being held back until No.

[3] Abul Hasan of Bangladesh became the second man to score a Test century at debut at No.

Duff's career was plagued by alcoholism, and he lost his life at the age of 33 in 1911.

This biographical article related to an Australian cricket person born in the 1870s is a stub.