Ireland Reaching Out has developed a list of the best genealogical sources and repositories when carrying out your Irish family history research. Their guide  details the records held by each site and includes applicable links. On the IrelandXO list: OFFICIAL STATE SOURCES National Library of Ireland General Registry Office of Ireland National Archives of Ireland, Genealogy Land Registry Valuation Office Police Service of Northern Ireland Military Archives Public Record Office of Northern Ireland Public Libraries of Northern Ireland General Registry Office of Northern Ireland National Archives of the United Kingdom General Register Office UK National Records of Scotland INTERNATIONAL ORGANISATIONS British Isles Family History Center of Greater Ottawa The Ontario Genealogical Society The Boston Pilot Statue of Liberty, Ellis Island Foundation Inc. Irish American Heritage Centre - Chicago The American Ireland Fund Ancient Order of Hibernians Irish Centre of Southern California Maine Irish Heritage Centre Boston Irish Tourism Association Coalition of Irish Immigration Centres in the USA Immigration Museum in Buenos Aires ADDITIONAL USEFUL RESOURCES Family Search Co. Waterford Library Death Registers Ancestry Find My Past Roots Ireland Irish Ancestry Irish Newspaper Archive Crestleaf Note: I think they're missing another good source, IGSI's Irish Collection. See blog posting: