| 11654 | Abbey Theatre Archive | BoxH/D | 1946-1955 | Logbook of plays received, 9 September 1946-7 April ... | |
| 16252 | Armagh Diocesan Archive (RC) | | 1955 | Rescript Number 702/55 of the Sacred Congregation of... | Cardinal John D'Alton Archive |
| 16281 | Armagh Diocesan Archive (RC) | | 1955 | Material on emigration, includes:Letter of Most Reve... | Cardinal John D'Alton Archive |
| 16308 | Armagh Diocesan Archive (RC) | | 1955 | Material relating to the Irish Centre, London, inclu... | Cardinal John D'Alton Archive |
| 6952 | Belfast Central Library | | 1953-1955 | A large collection of BBC radio scripts, 282 scripts... | BBC Scripts |
| 23970 | Brother Allen Archive | Box 184 | 1955 | Letter from Bob to Florrie, 3 January 1955. | Brother Allen Archival Collection |
| 23971 | Brother Allen Archive | Box 184 | 1955 | Letter from Bob to Florrie, 30 January 1955. | Brother Allen Archival Collection |
| 24422 | Brother Allen Archive | Box 198 - File A | 1955 | Envelope containing letter from Mary Collins to Brot... | Brother Allen Archival Collection |
| 16788 | Cashel, Ferns and Ossory Diocesan Archive (CoI) | | 1877-1949
1955-1959 | Cashel Clerical Union Minute Books:1877-18821882-190... | Bolton Library Archive |
| 16848 | Cashel, Ferns and Ossory Diocesan Archive (CoI) | | 1875-1955
1958-1997 | Ballintemple Register of Marriages: 1875-1955 1958-1... | Bolton Library Archive |
| 15103 | Catholic Girl Guides of Ireland | | 1955-1961 | Cash Book, 1955-1961. | |
| 15142 | Catholic Girl Guides of Ireland | | 1955 | 1 envelope, Receipts and material relating to the Nu... | |
| 15163 | Catholic Girl Guides of Ireland | | 1955-1958
1967 | Black leather holder: Account with the Hibernian, Ba... | |
| 14410 | Cavan County Archives | BH | 1921-1955 | Collection includes, among other items, Minutes, Acc... | Cavan Board of Health and Public Assistance |
| 6142 | Clare County Archives | | 1902-1955 | Agriculture Instruction Committee Accounts, 1902 - 1... | Clare County Council |
| 6152 | Clare County Archives | | 1955-1956 | Register of Salaries and Pensions, 1955-1956. | Clare County Council |
| 6160 | Clare County Archives | | 1955-1956 | Health Services Expenditure Book, 1955-1956. | Clare County Council |
| 6164 | Clare County Archives | | 1955-1962 | County Hospital Requirement Book, 1955-1962. | Clare County Council |
| 6173 | Clare County Archives | | 1955 | Clare County Council Minute Book, 1955. | Clare County Council |
| 20705 | Clare County Archives | | 1947-1955 | Public Park Account Book, 1947 - 1955, 1 volume. | Kilkee Town Commissioners |
| 23230 | Cork City and County Archives | U395 | 1955 | Copy of a letter from W. Thornhill to Mrs W.H. Harty... | Harty Papers |
| 19927 | Erasmus Smith Schools Archives | | 1955-1996 | Contemporary material relating to the running of the... | Erasmus Smith Archives |
| 23209 | Good Shepherd Sisters | | 1955-1991 | Closed Convents:Dunboyne 1955 to 1991 i) administrat... | |
| 20014 | Grand Lodge of Freemasons of Ireland | | 1795-1955 | Masonic Order in Ireland, Committee of Charity and I... | Masonic Female Orphan School |
| 59 | Irish Dominican Congregation Archives | I 2 | 1639-1955 | Lisbon Collection includes:List of some Irish nuns o... | Dominican Archives, Cabra |
| 20854 | Kildare Local Studies, Genealogy and Archives Department | | 1941-1955 | County Home, Athy: Daily Diet Scale Issue Book:... | Kildare Board of Health Records |
| 20864 | Kildare Local Studies, Genealogy and Archives Department | | 1938-1955 | County Home, Athy:Storekeepers’ Receipts &... | Kildare Board of Health Records |
| 21183 | King's Hospital School | 237-257A | 1955-1957 | 252 Fees Book, 1955 - 1957. | Morgan's School |
| 21188 | King's Hospital School | 254-281 | 1928-1955 | 257 Pupils' Address Book, 1928 - 1955. | King's Hospital Records |
| 21613 | Laois Local Studies | B/ | 1955-1956 | 71. Consolidated Account Itemised, 1955-1956. | Laois County Council |
| 22322 | Leitrim Local Studies Department | | 1925-1955 | Misc. 22. Cavan Circuit Court, Sessions Book, 3 Febr... | Miscellaneous Records, Leitrim |
| 22332 | Leitrim Local Studies Department | | 1937-1955 | Misc. 32. Mohill Sessions Book, 12 November 1937 - 1... | Miscellaneous Records, Leitrim |
| 12691 | Limerick Museum | AQNO(1996.1461.26) | 1955 | Bank Statement, printed with type additions; Munster... | |
| 14546 | Mayo Local History Department | | 1925-1955 | General Ledgers recording details of revenue and loa... | Ballina Urban District Council |
| 5998 | Meath Hospital, incorporating The National Children's Hospital | MH/MR/02 | 1904-1955 | Meath Hospital: Registers of Operations, 1904 - 1955... | |
| 6008 | Meath Hospital, incorporating The National Children's Hospital | MH/PC/03 | 1949-1955 | Meath Hospital: Urological department photographs, 1... | |
| 5791 | Meath Local Studies and Family History Department | DC/I/D/ | 1937-1955 | Treasurer and Banking Records.:Treasurer's corre... | Navan Urban District Council |
| 5813 | Meath Local Studies and Family History Department | UDC/I/G/ | 1938-1955 | Repairs to Artizan Dwellings, Correspondence: 75 48... | Navan Urban District Council |
| 20263 | Meath Local Studies and Family History Department | FJC | 1955-1957 | Account Book, May 1955 - April 1957. | F. and J. Clayton Company Records |
| 20267 | Meath Local Studies and Family History Department | FJC | 1955 | Stockbook 1955. | F. and J. Clayton Company Records |
| 20912 | Meath Local Studies and Family History Department | | 1931-1955 | Rate Abstracts, Combined Abstracts:77 1931-193278 19... | Navan Urban District Council |
| 21279 | Meath Local Studies and Family History Department | UDC/I/J/ | 1955
1956 | Sewerage, Expansion of System: 39 February 1956. Cir... | Navan Urban District Council |
| 21282 | Meath Local Studies and Family History Department | UDC/I/J/ | 1954
1955 | Sewerage, Expansion of System: 36 April 1954 - March... | Navan Urban District Council |
| 21505 | Monaghan County Museum | | 1900-1905
1912-1926
1937-1954
1955-1960 | County Committee of Agriculture Minutes1991:I0B - 19... | County Monaghan Local Authority Records |
| 592 | National Archives of Ireland | BG/137/ | 1948-1955 | Treasurer's Receipt and Payment Book:CE1 March 1... | Rathdown Poor Law Union and Rural District Council |
| 616 | National Archives of Ireland | BG/137/ | 1911-1955 | Indoor Relief Registers:G36 1911 - 1913G37 1913 - 19... | Rathdown Poor Law Union and Rural District Council |
| 694 | National Archives of Ireland | BG/40/BDA1 | 1952-1955 | Balrothery Board of Assistance Record of Executive, ... | Balrothery Poor Law Union and Rural District Council |
| 699 | National Archives of Ireland | BG/40/G1 | 1941-1955 | Indoor Registers: January 1941-December 1952, May 19... | Balrothery Poor Law Union and Rural District Council |
| 4655 | National Archives of Ireland | 304/11/17 | 1955 | Miss Margaret Kempfer, an American school teacher an... | Department of Foreign Affairs |
| 4688 | National Archives of Ireland | A/1/5 | 1955 | The Hague. Departure of Mrs MacNeill, March-June 195... | Department of Foreign Affairs |
| 4727 | National Archives of Ireland | 97/19/7 | 1955-1962 | National School Records, Cormeen, County Monaghan, R... | Department of Education |
| 4732 | National Archives of Ireland | BM113/1 | 1955-1959 | Milk for mothers and children, 1955-1959. | Department of Health |
| 4777 | National Archives of Ireland | 34/54 | 1952-1955 | Social Welfare Act 1952, Unemployment 1954/1955, Ben... | Department of Social Welfare |
| 4779 | National Archives of Ireland | 4110/55 | 1955-1956 | Rate of contributions payable in respect of female d... | Department of Social Welfare |
| 5588 | National Archives of Ireland | 999/311 | 1955-1959 | Western Region Department of Lands Branch: Minute Bo... | |
| 8866 | National Archives of Ireland | 1045/4/710 | 1926-1955 | Pay sheets for orphans who remain with their mothers... | Protestant Orphan Society |
| 8872 | National Archives of Ireland | 1045/5/4 | 1842-1955 | Unregistered Forms of Application for the Election o... | Protestant Orphan Society |
| 11290 | National Archives of Ireland | 362/37/3 | 1955 | File on television interview between Mrs de Valera a... | Department of Foreign Affairs |
| 11294 | National Archives of Ireland | 366/65/81 | 1955 | Proposed invitation to the Canadian Women's Press Cl... | Department of Foreign Affairs |
| 11325 | National Archives of Ireland | 324/250 | 1955 | Agnes Christina Doherty, grants to enable her to fin... | Department of Foreign Affairs |
| 11332 | National Archives of Ireland | 338/572 | 1955 | Proposal to award prize to the poetess, Marianne Moo... | Department of Foreign Affairs |
| 11333 | National Archives of Ireland | 338/574 | 1955-1956 | Visit of Siobhan McKenna to New York, August 1955- S... | Department of Foreign Affairs |
| 11334 | National Archives of Ireland | 338/595 | 1955-1956 | Harriet Cohen. International Music Award, December 1... | Department of Foreign Affairs |
| 11389 | National Archives of Ireland | 19126/Box408 | 1928-1955 | Rose Donnellan, special educational qualifications, ... | Department of Education |
| 11394 | National Archives of Ireland | 28428/Box652 | 1931-1955 | Winifred Staunton, probation case, rule 78, 1931-195... | Department of Education |
| 11400 | National Archives of Ireland | A1/20 | 1946-1955 | Carlow: Returns of Children in Foster Homes, Boarded... | Department of Health |
| 11429 | National Archives of Ireland | S687 | 1953-1955 | Emigration of young Irish girls to Britain, 1953-195... | Department of Environment |
| 11178 | National Gallery of Ireland Library | AB69 | 1899
1955 | Routine correspondence relating to Evie Hone's death... | |
| 1988 | National Library of Ireland | Ms7326 | 1919-1920, 1955 | Miscellaneous papers about the submission of a case ... | |
| 2504 | National Library of Ireland | Ms11001 | c1895-1955 | Letters to R I Best, c1895-1955. Correspondents incl... | R.I. Best Papers |
| 2689 | National Library of Ireland | Ms11004 | c1895-1955 | Letters to R I Best, c1895-1955. Correspondents incl... | R.I. Best Papers |
| 9061 | National Library of Ireland | Ms13970 | 1917-1955 | Letters and papers relating to the Irish Women Worke... | William O'Brien Papers |
| 9200 | National Library of Ireland | Ms15342 | c1955 | Letters to and by Liam Price, c1955, mostly concerni... | |
| 10843 | National Library of Ireland | Ms21208 | 1913-1955 | Correspondence relating to the activities of Kathlee... | Frank Gallagher Papers |
| 10847 | National Library of Ireland | Ms21231 | c.1954-1955 | Six letters to Frank Gallagher from Mary Hughes, Bro... | Frank Gallagher Papers |
| 281 | National Maternity Hospital | NMH/39 | 1955-1957 | Correspondence regarding the purchase of lease on no... | |
| 282 | National Maternity Hospital | NMH/38 | 1955-1958 | Correspondence file regarding building work on numbe... | |
| 404 | National Maternity Hospital | NMH/23 | 1955-1958 | Medical Council Minute Book, Minutes of the first mo... | |
| 458 | National Maternity Hospital | NMH/47 | 1953-1955 | File concerning the cost and specifics of updating t... | |
| 494 | National Maternity Hospital | CR/6 | 1953-1955 | National Maternity Hospital Medical and Clinical Rep... | |
| 1752 | National Maternity Hospital | M/3 | 1948-1955 | Master's Report, April 1948-December 1955. Hand-writ... | |
| 18892 | Offaly Archives | OH OHS12 | 1919-1955 | Audited statements of accounts, bank books and stock... | Records of North Offaly Co-operative Agricultural Society |
| 6278 | Public Record Office of Northern Ireland | BG/12/ | 1842-1955 | All board of guardian records are closed for 100 yea... | Downpatrick Board of Guardian Records |
| 6382 | Public Record Office of Northern Ireland | T/1797 | c1838-c1955 | Photographs and genealogical notes regarding the Han... | |
| 6508 | Public Record Office of Northern Ireland | D/1327/ | 1912-1955 | Access to the Ulster Unionist Council papers is limi... | Ulster Unionist Council Papers |
| 6546 | Public Record Office of Northern Ireland | D/1512 | c.1940-c.1955 | General notes on the Bullick family, c.1656-c.1955 a... | |
| 6660 | Public Record Office of Northern Ireland | D/1851 | 1879-1955 | c.32 volumes of records of Jennymount Mills, includi... | |
| 6824 | Public Record Office of Northern Ireland | D/2424 | 1905-1955 | The records of Glendinning, McLeish and Company, lin... | |
| 6998 | Public Record Office of Northern Ireland | D/2487/9 | 1955-1974 | Minute book of Banbridge Mixed Voice Choir, County D... | |
| 7926 | Public Record Office of Northern Ireland | T/1237/1-2 | 1777-1955 | Copy of family tree of the Flack family of County Ar... | |
| 7055 | Public Record Office of Northern Ireland | D/2658 | c.1830s-1955 | The papers of J.B. and R.H. Twigg Solicitors, Cookst... | |
| 7121 | Public Record Office of Northern Ireland | D/2838 | 1808-1955 | The papers of the Best family of County Antrim, incl... | |
| 7511 | Public Record Office of Northern Ireland | D/623/ | 1738-1955 | The Abercorn estate papers comprise of c.2,500 docum... | Abercorn Papers |
| 8131 | Public Record Office of Northern Ireland | T/1876/1-6 | c1750-1955 | Copies of emigrant letters, pedigree and genealogica... | |
| 8288 | Public Record Office of Northern Ireland | T/2307/ | 1933-1955 | T/2307/3-4 Copies of 2 letters from Joseph Devlin, M... | |
| 8509 | Public Record Office of Northern Ireland | T/2907/1 | 1955-1958 | Copy of a geographical survey and history of Gortin ... | |
| 3574 | Religious Society of Friends in Ireland Historical Library | LGM/5/9B/Reels 30-31 | 1894-1955 | Removal Certificate Book, Lurgan Monthly Meeting, 18... | |
| 5181 | Representative Church Body Library | D4/10-D4/13 | 1825-1955 | D4 Elphin and Ardagh Diocesan Papers, 1724-1975. Ard... | Elphin and Ardagh Diocesan Papers, 1724-1975 |
| 23717 | Representative Church Body Library | | 1850-1955 | Loose material in cardboard box.Typescript history o... | Young Women's Christian Association (YWCA) |
| 23748 | Representative Church Body Library | Ms 89 | 1925-1955 | Minute book 1925-1955: 'The Committee received with ... | Irish Guild of Witness |
| 22403 | Royal College of Physicians of Ireland | | 1980-1983
1955
1978 | Minutes of the Kathleen Lynn Memorial CommitteeRepor... | Saint Ultan's Hospital |
| 24973 | Royal Irish Academy of Music | 1120/16 | 1949-1955 | 5: 24 October 1949 - 5 January 1955, attendance book... | |
| 22663 | Services Industrial Professional Technical Union (SIPTU) | | 1955-1960 | Dublin District Council Files, 1955-1960. | Irish Transport and General Workers Union |
| 22671 | Services Industrial Professional Technical Union (SIPTU) | | 1955-1959 | Thurles Branch:Collectors Books, 1958-1959Members Pa... | Irish Transport and General Workers Union |
| 22735 | Tower Museum, Derry-Londonderry | | 1955-1969 | Irish Transport and General Workers' Union: Memb... | |
| 22742 | Tower Museum, Derry-Londonderry | | 1955-1967 | Photographs, including those of women members, of th... | |
| 22784 | Tower Museum, Derry-Londonderry | | 1955 | 9 enlarged black and white photographs which include... | |
| 9972 | UCC College Archives | SecO/Boxes79-85 | 1944-1955 | Files relating to Governing Body Meetings, 21 March ... | Secretary's Office |
| 3640 | UCC Special Collections & Archives | UC/DC 39 | 1953-1955 | Four letters from Mairin Chevasse to Corkery in Engl... | The Papers of Daniel Corkery |
| 3663 | UCC Special Collections & Archives | UC/DC752 | 1955 | Letter in Irish from Rita Ní Dhubhshlaine of ... | The Papers of Daniel Corkery |
| 3708 | UCC Special Collections & Archives | UC/DC715 | 1955 | Letter from Patricia [Griucin] relating to the lack ... | The Papers of Daniel Corkery |
| 9795 | UCC Special Collections & Archives | BL/EP/G/506 | 1950-1955 | Files relating to Estate administration kept by Majo... | Grehan Estate Collection |
| 21967 | UCC Special Collections & Archives | U175 | 1911-1915
1955-1959 | Box 17 contains two Cash Books, of Dr Bernard Dooly ... | |
| 4538 | Waterford City Archives | | 1953-1955 | Minute Book of Waterford City and County Infirmary, ... | Waterford City and County Infirmary |
| 4539 | Waterford City Archives | | 1955-1958 | Minute Book of Waterford City and County Infirmary, ... | Waterford City and County Infirmary |
| 4577 | Waterford City Archives | | 1948-1955 | Accidents Books, 8 July 1948-18 April 1955. | Waterford City and County Infirmary |
| 4578 | Waterford City Archives | | 1955-1960 | Accidents Books, 18 April 1955-15 August 1960. | Waterford City and County Infirmary |
| 4595 | Waterford City Archives | | 1955-1957 | X-Ray Book, 1955-1957. | Waterford City and County Infirmary |
| 4601 | Waterford City Archives | | 1938-1955 | Register of Dental Patients, 28 May 1938-8 October 1... | Waterford City and County Infirmary |
| 4603 | Waterford City Archives | 29/A | 1955-1968 | Register of Dental Patients (Mr T Carroll), 26 Octob... | Waterford City and County Infirmary |
| 4614 | Waterford City Archives | 35/1 | 1955-1960 | Patients' Register (Waterford Clinic), 23 March 1955... | Waterford City and County Infirmary |
| 23310 | Waterford City Archives | P30/ | 1950-1955 | 17: Fuel allowance report book, containing records o... | Michael Walsh Asylum |
| 23313 | Waterford City Archives | P30/ | 1950-1955 | 20: Electricity Supply Board payments book noting co... | Michael Walsh Asylum |
| 19200 | Westmeath County Archives Department | | 1935-1955 | Medical Assistance and Relief Registers: including n... | Westmeath County Council |
| 19214 | Westmeath County Archives Department | | 1944-1955 | Service Record of Officers, Westmeath County Council... | Westmeath County Council |
| 19230 | Westmeath County Archives Department | | 1955-1972 | Record Book of Refund of Rates:1955-1972 | Westmeath County Council |
| 19267 | Westmeath County Archives Department | | 1955-1975 | Day Book, Westmeath County Council:April 1955-April ... | Westmeath County Council |
| 19376 | Westmeath County Archives Department | | 1955-1959 | Athlone Urban District Council General Accounts Book... | Athlone Local Authority Records |
| 19394 | Westmeath County Archives Department | | 1942-1955 | Athlone Urban District Council Surveyor's Depart... | Athlone Local Authority Records |