- The General Register Office An tSeirbhís um Chlárú Sibhialta
- The central civil repository for records relating to Births, Deaths and Marriages in the Republic of Ireland. It is concerned with civil registration matters only, and does not engage in Genealogical/Family History research.
- National Archives of Ireland An Chartlann Náisiúnta Éire
- The National Archives holds the records of the modern Irish state which document its historical evolution and the creation of its national identity