The Royal Society of Antiquaries of Ireland is a learned society based in Ireland, whose aims are "to preserve, examine and illustrate all ancient monuments and memorials of the arts, manners and customs of the past, as connected with the antiquities, language, literature and history of Ireland". Founded in 1849, it has a countrywide membership from all four provinces of Ireland. Anyone subscribing to the aims of the Society, subject to approval by Council, may be elected to membership. Current and past members have included historians, archaeologists and linguists, but the Society firmly believes in the importance of encouraging an informed general public, and many members are non-professionals.
After the Society's move to Dublin in the 1890s, it came eventually to occupy the premises on Merrion Square, where it is still to be found. It now fulfills its original aims through the maintenance of its library and provision of lectures and excursions, as well as the continued publication of its Journal, which is one of the most respected publications in the field of Irish archaeology and history.