| 19174 | Adelaide Hospital | TCD MS 11270/2/1-8 | 1838-1999 | 2/ Executive General Committee/Managing Committee/Bo... | Adelaide Hospital Archive |
| 19177 | Adelaide Hospital | TCD MS 11270/5/1-7 | c.1900-1999 | 5 - Medical Patient registers Patient deaths Case fi... | Adelaide Hospital Archive |
| 19180 | Adelaide Hospital | TCD MS 11270/9 | 1987-1999 | 9/ Audio-visual material Recording of nurses' pr... | Adelaide Hospital Archive |
| 19183 | Adelaide Hospital | TCD MS 11270/12/1-7 | c.1870-1999 | 12/ Scrapbooks/newspaper clippings Volume entitled &... | Adelaide Hospital Archive |
| 14286 | Alexandra College | | 1900-1999 | 1 book, list of subscriptions promised to the buildi... | |
| 8753 | Ballymena Central Library | U/A(LAR)352 | 1968-1999 | Larne Borough Council Minutes:1968 (with the excepti... | Larne Borough Council Records |
| 6245 | Belfast Central Library | | 1898-1999 | Belfast City Council Minutes: July-December 1898 189... | Local Authority Records |
| 6212 | British Broadcasting Corporation, Northern Ireland (BBC NI) | | 1930-1999 | c. 2000 reel films with recordings of the British Br... | |
| 14381 | Clare County Archives | | 1970-1999 | Ennis Committee for Travelling People Collection:Inc... | Clare County Library Photographic Archive |
| 14383 | Clare County Archives | | 1990-1999 | Laban Traditional Music Collection:Images of people ... | Laban Traditional Music Collection |
| 14387 | Clare County Archives | | 1900-1999 | Miscellaneous Collections:Miscellaneous photos depic... | Clare County Library Photographic Archive |
| 14389 | Clare County Archives | | 1900-1999 | Old Ennistymon Society Collection:Photographs of lif... | Clare County Library Photographic Archive |
| 19857 | Derry Central Library | | c.1980-c.1999 | Collection of local history files comprising of pres... | |
| 21213 | Dublin City Library and Archive | DCSA/13/1 | 1898-1999 | Irish Hockey Union Minute Books:Scope and Content: C... | Irish Hockey Association Archive |
| 83 | Dublin Writers Museum (Closed) | | 1900-1999 | Portrait of Edna O'Brien by Peter Fitzgerald. | |
| 198 | Irish Film Archive | McCabe Collection: Reel 1 | 1900-1999 | McCabe Collection: Reel 10 Amateur 8 mm film which ... | |
| 199 | Irish Film Archive | McCabe Collection: Reel 1 | 1900-1999 | McCabe Collection: Reel 14 Amateur 8mm film which i... | |
| 200 | Irish Film Archive | McCabe Collection: Reel 1 | 1900-1999 | McCabe Collection: Reel 16 Amateur 8 mm film includ... | |
| 201 | Irish Film Archive | McCabe Collection: Reel 1 | 1900-1999 | McCabe Collection: Reel 19 - Visitors, Priests and N... | |
| 202 | Irish Film Archive | McCabe Collection: Reel 2 | 1900-1999 | McCabe Collection: Reel 23 Amateur 8mm film which i... | |
| 212 | Irish Film Archive | Centenary celebrations of | 1900-1999 | Centenary celebrations of a missionary convent: A f... | |
| 218 | Irish Film Archive | Filmbase 3 | 1900-1999 | 'Filmbase 3': Production Company: Filmbase This i... | |
| 222 | Irish Film Archive | McCabe Collection: Reel 7 | 1900-1999 | McCabe Collection: Reel 7 - 'Maureen in Uniform,... | |
| 223 | Irish Film Archive | McCabe Collection: Reel 9 | 1900-1999 | McCabe Collection: Reel 9 - 'Baby and Swimming&#... | |
| 225 | Irish Film Archive | Return to Kerry | 1900-1999 | 'Return to Kerry': Production Company: Triumph Mot... | |
| 224 | Irish Film Archive | McCabe Collection: Reel 8 | 1900-1999 | McCabe Collection: Reel 8- Waterville, Eskdale, Fr S... | |
| 238 | Irish Film Archive | Murphy's Stout commercial | 1950-1999 | 'Murphy's Stout commercial / It's a diff... | |
| 239 | Irish Film Archive | Twirl Commercial/ You can | 1950-1999 | 'Twirl Commercial/ You can't stop the taste': Comme... | |
| 2241 | Irish Theatre Archive | ITA/75 | 1800-1899
1900-1999 | Press cuttings, Queen's Theatre, Dublin, 19th to... | Press cuttings, Queen's Theatre, Dublin |
| 12332 | Irish Traditional Music Archive/ Taisce Ceoil Dúchais Éireann | | 1950-1999 | There are a number of special collections within thi... | |
| 14481 | Laois Local Studies | | 1970-1999 | Includes photos of people, events, infrastructural d... | Laois County Council Photographic Collection |
| 6210 | Linen Hall Library | | 1995-1999 | File of press releases of the Northern Ireland Women... | Northern Ireland Women's Coalition |
| 6218 | Linen Hall Library | | 1984-1999 | Copies of 'Women's News: Ireland's Femin... | |
| 6955 | Linen Hall Library | | c.1980-c.1999 | There are two archival boxes with material specifica... | Ephemera |
| 6957 | Linen Hall Library | | c.1970-c.1999 | The are c.170 items relating to women and politics i... | |
| 12131 | Mary Immaculate College, Limerick | | 1902-1999 | Archives include, among other documents:Corresponden... | |
| 14525 | Mayo Local History Department | | 1942-1999 | Manager's Orders, 1942-1999 | Castlebar Urban District Council |
| 14557 | Mayo Local History Department | | 1950 | The collection covers several aspects of life in Cou... | Lyons Photographic Collection |
| 11973 | Medical Missionaries of Mary Archive | Album 72 | 1946-1999 | The image archive of the Medical Missionaries of Mar... | Image Archive |
| 22821 | Methodist Historical Society of Ireland | | 1878-1999 | Soft bound volumes of yearly reports and agenda for ... | |
| 16477 | National Irish Visual Arts Library (NIVAL) | NIVAL FNCI | 1900-1999 | Arrangement:Annual ReportsArtifactsCyril McKeon'... | Friends of the National Collections |
| 974 | National Library of Ireland | Ms11426 | 1900-1999 | Copy of the Recollections of Miss Stopford, sometime... | |
| 2669 | National Library of Ireland | Ms8149 | 1800-1899
1900-1999 | Collection of letters to Sarah Purser, including 13 ... | |
| 12789 | National Library of Ireland | | 1900-1950
1997-1999
1980
1996 | The Sheehy Skeffington Collection is a vast collecti... | Sheehy-Skeffington Papers |
| 6205 | Omagh Library | | 1841-1999 | Microfilmed copy of the census of population for Cou... | Local Studies Collection |
| 13207 | Presbyterian Women | | 1875-1999 | The office contains the following annual reports: Fe... | |
| 8727 | Public Record Office of Northern Ireland | T/950/1 | 1100-1999 | Copy pedigree of the Montgomery family, Ireland, Sco... | |
| 1003 | Sisters of the Irish Ursuline Union | | 1769-1999 | Annals of the Ursuline Convent, Blackrock, Cork in 8... | Ursuline Convent Cork |
| 7629 | South Eastern Education and Library Board Local History Collection | IR324 | 1977-1999 | Bound registers of electors for the areas of Ards, L... | Local Studies Collection |
| 22686 | South Eastern Education and Library Board Local History Collection | | 1973-1999 | South Eastern Education and Library Board Minutes:19... | Local Studies Collection |
| 10320 | Trinity College Dublin, Manuscripts and Archives Department | TCDMs4508 | 1900-1999 | Accounts relating to an [?art exhibition], [?for the... | O'Sullivan/Solomons Collection |
| 24154 | Union Theological College | | 1988-1999 | Copies of Wider World, the successor of Women's Work... | |
| 24155 | Union Theological College | | 1840-1999 | General Assembly of the Presbyterian Church of Irel... | |
| 18369 | University of Galway Archives | A16a | 1999 | Letter from Hilary Rodham Clinton, First Lady of the... | Letter from Hilary Rodham Clinton |
| 18406 | University of Galway Archives | LE23 | 1999 | A compendium of family history on the Dalys of Castl... | The Daly Chronicle |
| 18590 | University of Limerick Special Collections and Archives | P27 | 1782-1999 | A. Historical Records (1782-1999)I. Relating to... | The Allott Collection |
| 18591 | University of Limerick Special Collections and Archives | P6 | 1662-1999 | 133 boxes, 2 outsize items (2522 files). The materia... | The Armstrong Papers |
| 6215 | UTV Archive | | c.1910-1999 | The majority of Ulster Television [UTV] programmes f... | |
| 12127 | Wicklow Library and Archives | | 1899-1999 | Wicklow Urban District Council Minute Books: 15 June... | Wicklow Urban District Council |