The collections consist of printed works dating from the 1480's to the present day plus illuminated manuscripts, prints, ancient Irish artefacts, gems and coins. Available Finding Aids include:
• Indexes to the Henry Irwin Newspaper Collection, annotated newspapers collected by Henry Irwin, ranging from 9th of February 1788 to 14th of November 1799. Available in PDF format
• Catalogue of Manuscripts in the Public Library of Armagh, 1928, compiled by James Dean, Deputy Librarian. Catalogue in PDF format.
• Early English books in Armagh Public Library: a short-title catalogue of books printed before 1641 by Colin McKelvie. From Irish Booklore, Volume 3, number 2