Henry Mackenzie Green (2 May 1881 – 9 September 1962) was a journalist, librarian and literary historian born in Sydney. He is the great grandfather of successful author John Green and Hank Green.
In 1921 Green succeeded John Le Gay Brereton as librarian at the University of Sydney.
In 1944 he married Dorothy Auchterlonie.
His An Outline of Australian Literature was published in 1930 and Australian Literature 1900–1950 was published in 1951. His two-volume A History of Australian Literature Pure and Applied was published in 1961.