The Joe Diorio papers comprise material created and collected by Joseph Louis Diorio (August 6, 1936 - February 2, 2022), American jazz guitarist and former USC Thornton Studio Guitar program faculty member. The largest part of the collection consists of music composition notebooks with Diorio's handwritten compositions. Some of the compositions in the collection were created by or for Diorio's students as part of Diorio's teaching activities. The Joe Diorio papers also include photographs; event programs; fliers; correspondence; concert posters; video and sound recordings of Diorio's live shows and studio recordings -- including commercially produced albums on CDs and vinyl phonograph records; music contracts; teaching materials; unpublished writing drafts of chapters for a publication; and visual artworks created by Diorio, including paintings, charcoal drawings, and sketchbooks.