Edward Gordon Duff (16 February 1863–28 September 1924) was an English bibliographer and librarian known for his works on early English printing.Duff was born in Liverpool on 16 February 1863. He was educated at Cheltenham College and Wadham College, Oxford, where he took a degree in classics in 1887. He began work on a catalogue of incunabula in the Bodleian Library but did not finish the project. In 1893 Enriqueta Augustina Rylands appointed Duff her librarian.