Domenico Gnoli (6 February 1838 – 12 April 1915) was an Italian author, librarian and art historian.
He attracted public attention by his volume of poems published under the pseudonym of Dario Gaddi, and a collection of critical essays, Odi Tiberine.
He was a professor of Italian literature at Turin, and in 1893 was made prefect of the Library Vittorio Emanuele at Rome.
He collaborated on the Nuova Antologia, and co-founded and co-edited the magazine Archivio Storico dell'Arte.
His translations include the Römische Elegien of Goethe, and various other German classics.